prEN ISO 16119-4

• Abstract:

  This part of ISO 16119 specifies requirements and the means for their verification for the design and performance of fixed and semi-mobile sprayers, as defined in 3.1 and 3.2, with regard to minimizing the potential risk of environmental contamination during use, including misuse foreseeable by the manufacturer.; This type of spraying system is generally a combination of separate elements (main tank, pump and application unit) that can be assembled in fixed installations (fixed sprayers) or with moving parts (semi-mobile sprayers).; It does not apply to application equipment for space/spatial treatments.; It is intended to be used with ISO 16119 1, which gives general requirements common to all the sprayer types covered by ISO 16119. When requirements of this part of ISO 16119 are different from those stated in ISO 16119 1, the requirements of this part of ISO 16119 take precedence over the requirements of ISO 16119 1 for machines within the scope of this part of ISO 16119. This part of ISO 16119 does not cover safety aspects (see ISO 4254 6).; • Filling - Total tank extra volume; • Quick coupler for CTS + mandatory provision of inductor hopper or CTS; • Filters drain valve; • Digital level indicator + accuracy; • Pump requirements as per ISO 12908: 2020; • Residue concentration only one method for system rinsing

• Status: Not Published
• Publication Date: 02-Apr-2028
• ICS: 65.060.40 - Plant care equipment
• Technical Committee: CEN/TC 144 - Tractors and machinery for agriculture and forestry
• Drafting Committee: CEN/TC 144/WG 3 - Mobile machines and trailers
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 08-Oct-2026
• Completion Date: 08-Oct-2026
• Directive: 2023/1230 - Regulation (EU) 2023/1230 of the European Parliament and of the Council of 14 June 2023 on machinery and repealing Directive 2006/42/EC of the European Parliament and of the Council and Council Directive 73/361/EEC (Text with EEA relevance)
• Mandate: M/605 - COMMISSION IMPLEMENTING DECISION of 20.1.2025 on a standardisation request to the European Committee for Standardization and to the European Committee for Electrotechnical Standardization as regards machinery and related products in support of Regulation (EU) 2023/1230 of the European Parliament and of the Council
• Ref Project: oSIST prEN ISO 19119-4:2026 - Agricultural and forestry machinery - Environmental requirements for sprayers - Part 4: Fixed and semi-mobile sprayers (ISO/DIS 16119-4:2026)

• Revises: EN ISO 16119-4:2014 - Agricultural and forestry machinery - Environmental requirements for sprayers - Part 4: Fixed and semi-mobile sprayers (ISO 16119-4:2014)
• Effective Date: 25-Sep-2024

prEN ISO 16119-4 is a CEN standard for the environmental requirements of fixed and semi-mobile sprayers used in agriculture and forestry. It specifies design, performance and verification requirements that reduce the risk of environmental contamination during use, including foreseeable misuse by the manufacturer.

What does prEN ISO 16119-4 specify?

prEN ISO 16119-4 covers fixed and semi-mobile sprayers made up of separate elements such as the main tank, pump and application unit. It sets requirements for how these sprayers are built, how they perform, how they are checked, and what information the operator must receive.

The scope excludes application equipment for space or spatial treatments, including sprayers with thermal droplet production and foggers. The document is intended to be used together with ISO 16119-1, which provides the general requirements common to all sprayer types; where the two parts differ, this part takes precedence for machines within its scope. The introduction also identifies it as a type C standard, so its provisions override type A or B standards for machines designed to it.

The document is organized into:

• Clause 4 - requirements
• Clause 5 - verification
• Clause 6 - marking
• Clause 7 - operator’s manual
• Annex A - normative verification of pump pulsations
• Annex ZA - informative relationship to Regulation (EU) 2023/1230

Annex	What it covers
Annex A	Verification of pump pulsations
Annex ZA	Relationship with the essential requirements of Regulation (EU) 2023/1230

What are the key requirements of prEN ISO 16119-4?

prEN ISO 16119-4 focuses on environmental protection at the points where liquid can leak, be overfilled, be misapplied, or remain as residue. The most important requirements are concentrated in Clause 4, with Annex A providing a dedicated pump test.

Pump/tank unit requirements

Clause 4.1 requires the pump/tank unit to be free of static leaks when the tank is filled to nominal capacity. The remaining liquid after emptying is limited by tank volume, so the standard controls how much product can stay inside the system after use.

The spray tank surface finish is also controlled. Inner walls must have limited roughness, and for semi-mobile sprayers this applies to the outer walls as well. In practice, this helps cleaning and reduces the risk that product or residue will cling to rough surfaces.

Filling design is a major topic in 4.1.3. Filling arrangements must prevent return flow to the supply, avoid splashing and spillage, and use strainers with a small mesh and limited gap around the filling opening. Fixed sprayers and semi-mobile sprayers have different filling provisions, and fixed sprayers with an automatic shut-off valve need a digital tank level sensor. That matters because overfilling prevention is tied to how the tank level is measured and how filling stops.

The tank emptying device must allow complete drainage in a horizontal position, with no visible puddles after 5 minutes. Clause 4.1.3 also requires a guarded outlet so the liquid can be collected without contaminating the environment or exposing the operator.

The tank contents indicator must be readable from the filling position and accurate within stated tolerances. If an automatic shut-off valve is used to prevent overfilling, a digital tank level indicator is mandatory. The mixing requirement in 4.1.3.5 controls how evenly the mixture is kept in the tank, because uneven concentration can lead to under- or over-application.

Pump, dosing and application unit

Clause 4.1.4 requires the pump capacity to match the sprayer’s operating limits, and the pump flow rate must be measured according to ISO 12809:2020. The pump and any air chamber must not create pulsations above 5 % of working pressure, which matters because pressure swings affect dose accuracy and nozzle output. Annex A gives the test arrangement for checking those pulsations.

Clause 4.2 covers dose and volume adjustment. Pressure adjustment devices must keep working pressure stable, and after switching the application unit or sections off and on, pressure has to return close to its original value. Direct injection systems, when fitted, must prevent backflow, be cleanable where clogging can occur, and keep injection rate, drive water flow and mixing ratio within declared limits.

The application unit requirements in 4.3 include pressure indication, pressure drop control and nozzle performance. Nozzles must be fixed in predetermined positions, must not drip after shut-off, and their individual flow rates must stay close to the declared data. Horizontal booms have specific requirements for working width, boom height adjustment and spray distribution. Vertical and other non-horizontal booms must be adjustable to crop conditions, with independent shut-off and direction adjustment, and air-assisted systems must keep air flow within the declared range and reasonably symmetrical where symmetrical application is intended.

Autonomous application units have extra controls: they must stop movement when spray flow ceases, or when pressure or speed moves outside the permitted range. Their measured volume per area must stay within the stated tolerance during spraying, independent of tank fill level. Clause 4.3.8 also requires measures to reduce spray drift as far as practicable and to describe those measures in the operator’s manual.

Cleaning and residue control

Clause 4.4 is aimed at keeping cleaning from becoming a source of contamination. If a rinse water tank is provided, it must be separate from the operator’s clean water tank and large enough for rinsing and dilution of residues. The standard also requires the sprayer to be cleanable internally and externally without unnecessary environmental contamination.

After cleaning, residue concentration must be reduced by a factor of 300 compared with the starting concentration. That gives a clear benchmark for whether the cleaning system actually removes product, not just moves it around.

Clause 4.5 covers plant protection product container cleaning devices. When these are fitted, the remaining residue after cleaning must be extremely small, and rinsing water must be transferred to the spray tank without spillage.

Verification, marking and instructions

Clause 5 says the requirements are verified by visual inspection, measurement or functional testing, and Table 3 summarizes which method applies to each subclause. Clause 6 points back to ISO 16119-1 for marking, and Clause 7 does the same for the operator’s manual, with extra information on speed limits, crop adjustment, drift reduction, fan setting, rinse-water arrangements and pump flow rate.

What terms does prEN ISO 16119-4 define?

prEN ISO 16119-4 uses the vocabulary of ISO 5681 and adds a few key terms of its own.

• Module - a stand-alone device that is not a sprayer by itself, but becomes one when combined with compatible modules; this supports separate testing of different manufacturers’ parts.
• Residual volume - the liquid left in the system after emptying, which is limited because leftover product can increase environmental contamination.
• Direct injection system - a system that meters plant protection product into the spray water stream, so its accuracy and backflow control directly affect dose quality.
• Rinse water tank - a separate tank for rinsing liquid, used to clean the sprayer and dilute residues without contaminating the operator’s clean water supply.
• Working pressure - the pressure at which the sprayer operates during application, used as the reference for pressure stability, pulsation and nozzle checks.
• Pressure indicator - the analog or digital device used to read working pressure, which must be readable, stable and accurate enough for set-up and verification.

Who uses prEN ISO 16119-4?

prEN ISO 16119-4 is used by sprayer manufacturers, design engineers, test laboratories, conformity assessors and quality managers working with agricultural and forestry spraying equipment. It is also relevant to operators and maintenance staff because it specifies the filling, cleaning, adjustment and manual information needed for safe environmental performance.

The standard is especially relevant where fixed installations or semi-mobile systems are used for crop protection products and where overfilling, residue, drift and cleaning losses need to be controlled.

Which standards are used with prEN ISO 16119-4?

Standard	What it contributes
ISO 16119-1	General environmental requirements common to all sprayer types
EN ISO 4254-6	Safety aspects of sprayers and liquid fertilizer distributors; also referenced for emptying, controls and instructions
ISO 5681	Vocabulary for crop protection equipment
EN ISO 21920-2 / ISO 21920-3	Surface texture terms and measurement operators for tank roughness
EN 837-1	Pressure gauge dimensions and requirements
ISO 4102	Connection threading for pressure indicator test connections
ISO 5682-1 to ISO 5682-4	Test methods for nozzles, transverse distribution, volume/area adjustment and tank agitation
ISO 8169	Connecting dimensions for nozzles and manometers
ISO 9357	Tank nominal volume and filling hole diameter
ISO 9898	Air-assisted sprayer fan output and symmetry test method
ISO 12809	Pump flow rate test method
ISO 13440	Determination of total residual volume
ISO 13457	Water-driven chemical injector pumps
ISO 16236	Determination of drainable volume and concentration
ISO 19932-1	Spray gun and lance safety and durability test method
ISO 21278-1 / ISO 21278-2	Container cleaning device tests and induction hopper requirements
ISO 22368-1 / ISO 22368-3	Cleaning system and tank cleaning test methods
ISO 4444	Recording spray drift parameters
ISO 22856 / ISO 22866	Drift measurement methods cited in the drift-control note
ISO 25119	Additional background for control systems in autonomous application units

What does the prEN ISO 16119-4 document contain?

prEN ISO 16119-4 contains detailed requirements for the pump/tank unit, dose adjustment, application unit, cleaning systems and plant protection product container cleaning devices. It also includes a verification table that links each subclause to inspection, measurement or functional testing.

The document includes a tank filling figure, tables for tank overfill allowance, strainer depth and pressure indicator accuracy, and a normative annex for pump pulsation testing. Its introduction explains that the requirements are based on test methods originally developed for hydraulic sprayers, and Annex ZA maps the standard to Regulation (EU) 2023/1230 for EU conformity purposes.

SLOVENSKI STANDARD
01-december-2026
Kmetijski in gozdarski stroji - Okoljevarstvene zahteve za škropilnice - 4. del:
Stalno nameščene in polprenosne škropilnice (ISO/DIS 16119-4:2026)
Agricultural and forestry machinery - Environmental requirements for sprayers - Part 4:
Fixed and semi-mobile sprayers (ISO/DIS 16119-4:2026)
Land- und Forstmaschinen - Umweltanforderungen an Pflanzenschutzgeräte - Teil 4:
Fest installierte und teilbewegliche Geräte (ISO/DIS 16119-4:2026)
Matériel agricole et forestier - Exigences environnementales pour les pulvérisateurs -
Partie 4: Pulvérisateurs fixes et semi-mobiles (ISO/DIS 16119-4:2026)
Ta slovenski standard je istoveten z: prEN ISO 16119-4
ICS:
65.060.40 Oprema za nego rastlin Plant care equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 16119-4
ISO/TC 23/SC 6
Agricultural and forestry
Secretariat: AFNOR
machinery — Environmental
Voting begins on:
requirements for sprayers —
2026-10-06
Part 4:
Voting terminates on:
2026-12-29
Fixed and semi-mobile sprayers
Matériel agricole et forestier — Exigences environnementales
pour les pulvérisateurs —
Partie 4: Pulvérisateurs fixes et semi-mobiles
ICS: 65.060.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
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STANDARDS MAY ON OCCASION HAVE TO
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PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 16119-4:2026(en)
DRAFT
ISO/DIS 16119-4:2026(en)
International
Standard
ISO/DIS 16119-4
ISO/TC 23/SC 6
Agricultural and forestry
Secretariat: AFNOR
machinery — Environmental
Voting begins on:
requirements for sprayers —
2026-10-06
Part 4:
Voting terminates on:
2026-12-29
Fixed and semi-mobile sprayers
Matériel agricole et forestier — Exigences environnementales
pour les pulvérisateurs —
Partie 4: Pulvérisateurs fixes et semi-mobiles
ICS: 65.060.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
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Published in Switzerland Reference number
ISO/DIS 16119-4:2026(en)
ii
ISO/DIS 16119-4:2026(en)
Contents Page
Introduction .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 3
4.1 Pump/tank unit .3
4.1.1 Static leaks .3
4.1.2 Residual volume .3
4.1.3 Spray tank(s) .3
4.1.4 Pump .6
4.1.5 Lines (hoses and pipes) .6
4.1.6 Filters.7
4.1.7 Measuring systems .7
4.1.8 Provisions for connecting testing equipment .7
4.2 Adjustment of the dose/volume application rate .8
4.2.1 General .8
4.2.2 Pressure adjustment devices .8
4.2.3 Direct injection system (if provided) .8
4.2.4 Calibration aids .9
4.3 Application unit .9
4.3.1 Controls .9
4.3.2 Pressure drop.9
4.3.3 Nozzles .9
4.3.4 Horizontal spray boom .9
4.3.5 Vertical spray boom and other non-horizontal spray booms .10
4.3.6 Spray gun and lance .11
4.3.7 Autonomous application units .11
4.3.8 Control of spray drift . 12
4.4 Cleaning . 12
4.4.1 Rinse water tank . 12
4.4.2 Cleaning systems . 12
4.5 Plant protection product container cleaning device . 13
4.6 Additional requirements for modules . 13
4.6.1 General . 13
5 Verification .13
6 Marking . .15
7 Operator’s manual . .15
Annex A (normative) Verification of pulsations of the pump .16
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2023/1230 aimed to be covered . 17
Bibliography .18

iii
ISO/DIS 16119-4:2026(en)
Introduction
The requirements of this part of EN ISO 16119 are based on the test methods given in ISO 5682-2:1997,
which were primarily developed for hydraulic sprayers. For other types of sprayers, other test methods and/
or test criteria may be needed and may be the subject of future investigation and a revision of this part of EN
ISO 16119.
This document is a type C standard as stated in EN ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations and hazardous events are
covered are indicated in the scope of this document.
When provisions of this type C standard are different from those which are stated in type A or B standards,
the provisions of this type C standard take precedence over the provisions of the other standards, for
machines that have been designed and built according to the provisions of this type C standard.

iv
DRAFT International Standard ISO/DIS 16119-4:2026(en)
Agricultural and forestry machinery — Environmental
requirements for sprayers —
Part 4:
Fixed and semi-mobile sprayers
1 Scope
This part of EN ISO 16119 specifies requirements and the means for their verification for the design
and performance of fixed and semi-mobile sprayers, with regard to minimizing the potential risk of
environmental contamination during use, including misuse foreseeable by the manufacturer.
This type of spraying system is generally a combination of separate elements (main tank, pump and
application unit) that can be assembled in fixed installations (fixed sprayers) or with moving parts (semi-
mobile sprayers).
It does not apply to sprayers with thermal droplet production and foggers, in particular if they are intended
to be application equipment for space/spatial treatments.
It is intended to be used with EN ISO 16119-1, which gives general requirements common to all the sprayer
types covered by EN ISO 16119. When requirements of this part of EN ISO 16119 are different from
those stated in EN ISO 16119-1, the requirements of this part of EN ISO 16119 take precedence over the
requirements of EN ISO 16119-1 for machines within the scope of this part of EN ISO 16119. This part of EN
ISO 16119 does not cover safety aspects (see EN ISO 4254-6).
This part of EN ISO 16119 is not applicable to sprayers manufactured before the date of its publication.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 837-1:1997, Pressure gauges – Part 1: Bourdon tube pressure gauges – Dimensions, metrology, requirements
and testing
ISO 4102:1984, Equipment for crop protection — Sprayers — Connection threading
EN ISO 4254-6:20XX, Agricultural machinery — Safety — Part 6: Sprayers and liquid fertilizer distributors
ISO 4444:2022, Agricultural sprayers — Recording of spray drift parameters
ISO 5681:2020, Equipment for crop protection — Vocabulary
ISO 5682-1:2017, Equipment for crop protection — Spraying equipment — Part 1: Test methods for sprayer
nozzles
ISO 5682-2:2017, Equipment for crop protection — Spraying equipment — Part 2: Test methods to assess the
horizontal transverse distribution for hydraulic sprayers
ISO 5682-3:2017, Equipment for crop protection — Spraying equipment — Part 3: Test method to assess the
performance of volume/area adjustment systems

ISO/DIS 16119-4:2026(en)
ISO 5682-4:2021, Equipment for crop protection — Spraying equipment — Part 4: Test methods for agitation of
sprayer tanks
ISO 8169:1984, Equipment for crop protection — Sprayers — Connecting dimensions for nozzles and manometers
ISO 9357:1990, Equipment for crop protection — Agricultural sprayers — Tank nominal volume and filling hole
diameter
ISO 9898:2000, Equipment for crop protection — Test methods for air-assisted sprayers for bush and tree crops
ISO 12809:2020, Crop protection equipment — Reciprocating positive displacement pumps and centrifugal
pumps — Test method
ISO 13440:1996, Equipment for crop protection — Agricultural sprayers — Determination of the volume of
total residual
ISO 13457:2021, Agricultural irrigation equipment — Water-driven chemical injector pumps
ISO 16119-1:20xx, Agricultural and forestry machinery — Environmental requirements for sprayers — Part 1:
General
ISO 16236:2013, Crop protection equipment — Test method for the determination of drainable volume and its
concentration
ISO 19932-1:2013, Equipment for crop protection — Knapsack sprayers — Part 1: Safety and environmental
requirements
ISO 21278-1:2008, Equipment for crop protection — Induction hoppers — Part 1: Test methods
ISO 21278-2:2008, Equipment for crop protection — Induction hoppers — Part 2: General requirements and
performance limits
EN ISO 21920-2:2022, Geometrical product specifications (GPS) - Surface texture: Profile - Part 2: Terms,
definitions and surface texture parameters
ISO 21920-3:2022, Geometrical product specifications (GPS) - Surface texture: Profile - Part 3: Specification
operators
ISO 22368-1:2004, Crop protection equipment — Test methods for the evaluation of cleaning systems — Part 1:
Internal cleaning of complete sprayers
ISO 22368-3:2004, Crop protection equipment — Test methods for the evaluation of cleaning systems — Part 3:
Internal cleaning of tank
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5681 and the following apply.
3.1
Module
stand-alone device that is not a sprayer on its own, but functions as a sprayer when combined with other
compatible modules
Note 1 to entry: module 1 (application unit - ISO 5681 - 3.2.7.15) and module 2 (pump-tank unit - ISO 5681 - 3.2.5.10)
Allow the separate testing of modules from different manufactures.

ISO/DIS 16119-4:2026(en)
4 Requirements
4.1 Pump/tank unit
4.1.1 Static leaks
With the spray tank filled to its nominal capacity and placed on a horizontal surface (in the case of non-fixed
installations) and without running the pump, there shall be no leakage from the tank, pump and associated
pipes.
4.1.2 Residual volume
The volume of total residual as defined in ISO 13440:1996, 2.1 shall not exceed:
— 4 % of the nominal tank volume for a tank volume of less than 400 l;
— 3 % of the nominal tank volume for a tank volume of between 400 l (included) and 1 000 l (included);
— 2 % for a tank volume of more than 1 000 l.
The volume of total residual shall be determined in accordance with ISO 13440.
4.1.3 Spray tank(s)
4.1.3.1 Surfaces
The depth of roughness, Rz, (see EN ISO 21920-2) of the inner walls of the spray tank shall be such that
Rz ≤ 100 μm, measured according to ISO 21920-3.
For semi-mobile sprayers, this requirement applies also for the outer walls of the spray tank.
4.1.3.2 Filling
4.1.3.2.1 Semi-mobile sprayers
Filling devices shall be designed to avoid any return of liquid from the spray tank to the filling supply.
The filling hole diameter shall comply with ISO 9357. The opening lid shall seal sufficiently to prevent
leakage/spillage when closed, both with the strainer in position and removed. The lid shall be lockable to
avoid unexpected opening. If a vent is provided in the lid, spillage shall be avoided.
To prevent spillage as a result of overfilling, the total tank volume shall be:
— at least 5 % more than its nominal volume, or;
— at least 200 L more than its nominal volume when an automatically operated shut-off valve is provided,
or;
— at least volume as given in Table 1 more than its nominal volume, in dependency on the largest tank
filling connection size.
ISO/DIS 16119-4:2026(en)
Table 1 — Additional volume to nominal tank volume in dependency on the largest tank filling
connection size
Largest tank filling connection size Additional tank volume [l]
[inch]
1” 10
2” 50
3” 100
4” 200
5“ 350
6” 550
NOTE 1 in = 2,54 cm.
Strainers shall be installed in filling openings and shall have a mesh size less than 2 mm. Any gap(s) between
the tank filling hole and the strainer shall not exceed 2 mm (see Figure 1).
Strainers shall have a minimum depth, d, as given in Table 1 and measured according to Figure 1.
The filling capacity of the tank with strainer when filled with water shall be at least 100 l/min for tanks with
a nominal volume of 100 l or more. For tanks with a nominal volume of less than 100 l, it shall be possible to
fill the tank within 1 min.
Induction hoppers, if any, shall comply with ISO 21278-2.
Table 2 — Minimum depth of strainers
a
Nominal tank capacity Minimum depth
C d
l mm
C ≤ 150 60
150 < C ≤ 400 100
400 < C ≤ 600 150
C > 600 250
a
Measured from the upper edge of the strainer down to its bottom.

ISO/DIS 16119-4:2026(en)
Dimensions in millimetres
Key
d minimum depth
Figure 1 — Determination of the depth of the strainer and width of gap(s)
4.1.3.2.2 Fixed sprayers
Filling devices shall be designed to avoid any return of liquid from the tank to the filling supply.
A tank cover shall be present to prevent objects falling in. The tank cover may be provided with a filling hole.
Any filling hole shall be designed in such a way that splashing and spillage of the spray liquid during filling is
avoided. The tank cover shall be lockable to avoid unexpected opening.
Strainers shall be installed in filling openings and shall have a mesh size less than 2 mm. Any gap(s) between
the tank filling hole and the strainer shall not exceed 2 mm (see Figure 1).
Strainers shall have a minimum depth, d, as given in Table 1 and measured according to Figure 1.
The total tank volume shall be at least 5 % or 200 l more than its nominal volume, to prevent spillage as a
result of overfilling. For the second option, the 200 l extra volume, an automatically operated shut-off valve
and digital tank level sensor are required to prevent overfilling. Tanks with a nominal volume greater than
200 l shall have a nominal volume which is a multiple of 100 l.
The filling capacity of the tank when filled with water shall be at least 100 l/min for tanks with a nominal
volume of 100 l or more. For tanks with a nominal volume of less than 100 l, it shall be possible to fill the
tank within 1 min.
Sprayers shall be equipped with a mean for introducing chemical products , see EN ISO 4254-6:20XX.

ISO/DIS 16119-4:2026(en)
4.1.3.3 Tank emptying device
An emptying device in accordance with EN ISO 4254-6:20XX, 5.4.3 shall allow the complete emptying of
the residual in the tank when the sprayer is in a horizontal position. Complete emptying of the residual is
considered to have been achieved when there are no visible puddles at the bottom of the tank after 5 min
drainage.
It shall be possible to collect the liquid at the outlet without contaminating the environment or equipment
part, e.g. steps and without potential risk of exposure of the operator, e.g. using a tap.
The tank outlet shall be guarded against accidental opening.
4.1.3.4 Tank contents indicator(s)
The indication of contents shall correspond to ISO 9357. It shall be durable and easily readable from where
the tank is filled.
The acceptable tolerances of the indication are:
a) ±15 % for each graduation mark/read-out for volumes up to 10 % of the nominal tank volume;
b) ±7,5 % for each graduation mark/read-out for volumes from 10 % to 20 % of the nominal tank volume;
and
c) ±5 % for each graduation mark/read-out for volumes above 20 % of the nominal tank volume.
Other means of visually checking the contents of the tank are allowed if they achieve equivalent accuracy.
The tolerances shall be measured with a maximum error on measurement of ±1 %, with the sprayer in a
horizontal position.
A digital tank level indicator shall be mandatory when automatic shut-off valve is used for overfilling
prevention as specified (see 4.1.3.2.2).
4.1.3.5 Mixing
Tanks shall be designed (e.g. including agitators) to ensure an even concentration of mixture.
The maximum allowable relative deviation of tank and spraying concentrations is ±15 %, tested in
accordance with ISO 5682-4, When pump backflow is necessary to meet this requirement, the minimum
value to meet this requirement shall be measured according to Annex A and specified in the operator’s
manual.
4.1.4 Pump
The capacity of the pump shall be suited to the needs of the sprayer. The pump shall have sufficient flow
rate capacity to be able to spray within the operating limits specified in the sprayer operator’s manual and
maintaining an even concentration of mixture at level required in 4.1.3.5. The flow rate of pump shall be
measured according to ISO 12908:2020, 7.3.2.1 and specified in the operator’s manual (see Clause 7).
The pump (including air chamber if present) shall not cause pulsations that exceed 5 % of the working
pressure, measured on the application unit at nominal rotation speed of the pump at the intended working
pressure.
4.1.5 Lines (hoses and pipes)
The bending radius of hoses shall be within the limits recommended by the hose manufacturer. Pipes and
hoses shall not have any deformation which could disturb the liquid flow.
Pressure lines shall be equipped with quick-acting shut-off devices (e.g. tip-over lever valves).

ISO/DIS 16119-4:2026(en)
The maximum working pressure of hoses and the maximum working pressure of connecting devices shal
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