storage, handling and use of all these disinfectants can be dangerous, therefore
health and safety requirements must be strictly observed.”
Section 6.3.3 “Procedure for the use of disinfectants” states that the specifi cations
of the disinfectant manufacturer must be observed and that a sample must be tested
bacteriologically after successful disinfection and subsequent fl ushing. Finally it is
demanded that: “A full record of th
of the entire procedure and the test
results must be compiled and submitted to the owner of the building.”
Information leafl et “Leak tests of drinking water installations with compressed
of the German Central Association for
Sanitary, Heating and Air Conditioning (ZVSHK)
this information leafl et defi nes under “3.1 General” for the national
regulations: “Due to the compressibility of gases, the rules for the prevention of
accidents “Working on Gas Systems” and the “Technical Rules for Gas Installations
e observed for physical and safety reasons when conducting
pressure tests with air Therefore, the test pressures have been defi ned as maximum
0.3 MPa (3 bar), the same as for load and leak tests for gas pipes, in agreement
with the responsible industrial liability insurance association and based on these
ions are thereby fulfi lled.
ions are thereby fulfi lled.
est methods A, B and C offered in section 6.1 of EN 806-4:2010
for pressure testing with water, information leafl et
“Leak tests of drinking water
installations with compressed air, inert gas or water” (January 2011)
the German Central Association for Sanitary, Heating and Air Conditioning
defi nes the following for
“For reasons of practicability on the building site,
a modifi ed method based on practical tests which can be used for all materials and
combinations of materials was chosen. The test time has been extended in relation
to the time specifi ed in the standard to allow even the slightest leaks to be detected.
Test method B in accordance with DIN EN 806-4 is the basis for conducting the leak
test with water for all materials.”
The following is defi ned:
“In buildings with enhanced hygiene requirements such as medical facilities, hospi-
tals, doctors' practices, the use of inert gases may be required to rule out conden-
sation of the moisture in the pipe.”
(Not possible with REMS Multi-Push).
Leak testing with compressed air
Leak testing with compressed air
Leak testing with compressed air is to be conducted whenLeak testing with compressed air
a longer standstill time between the leak test and commissioning, especially at
average ambient temperatures > 25°C, is to be expected to rule out possible
the pipe system cannot remain completely full from the leak test to commissioning,
e.g. during a frost period,
the corrosion resistance of a material in a partially drained line is endangered
Leak testing with water can be conducted whenLeak testing with water
changing of the water can be ensured at regular intervals, after seven days at
the latest, from the time of the leak test to commissioning of the drinking water
installation. Additionally when
it is ensured that the house or building water connection is fl ushed and therefore
released for connection and operation,
the pipe system is fi lled using totally hygienic components,
the system remains full from the leak test to commissioning and partial fi lling can
Drinking water directive in the version of 2nd of August 2013, § 11
the drinking water directive in the version of the 2nd of August 2013 in
Germany the drinking water directive in the version of the 2nd of August 2013 in Germany
§ 11 “Treatment materials and disinfection methods” defi nes that only treatment
materials contained in a list of the Federal Ministry of Health may be used for the
disinfection of drinking water. This list is maintained by the Federal Environment Offi ce.
chnical Rule – Worksheet DVGW W 557 (A) October 2012 of the DVGW
German Gas and Water Association
, further instructions for the “Cleaning and Disinfection of Drinking Water
Installations” can be taken from the Technical Rule - Worksheet DVGW W 557 (A)
October 2012 of the German Association of the Gas and Water Trade (DVGW).
Section 6 “Cleaning” specifi es under 6.1 “General, aim of the cleaning”: “Cleaning
must be implemented as the fi rst measure in case of an existing microbial contam-
ination of the nature of the drinking water. It may be necessary to disinfect the
installation additionally after cleaning.”
Section 6.3 “Cleaning methods” describes the fl ushing methods “fl ushing with water”
and “fl ushing with an a water/air mixture” which are basically familiar from EN 806-4.
Contaminations can enter the pipe system during new installation and repair work;
there may even be a danger of microbial contamination. Section 6.3.2.2 “Flushing
with a water/air mixture” explains: “To remove encrustations, deposits or bio-fi lms
in existing pipes, fl ushing with water and air is necessary to achieve an enhanced
cleaning performance. The full coverage turbulent fl ow causes locally high forces
to mobilise deposits. The water requirement is reduced considerably in comparison
with fl ushing with water.”
Section 7 “Disinfection” describes the thermal and especially the chemical installa-
tion disinfection as a discontinuous measure for the decontamination of a drinking
water installation in detail. “Installation disinfection must only be carried out by
specialist companies.” Section 7.4.2 lists 3 “proven disinfection chemicals”, hydrogen
, sodium hypochlorite NaOCl and chlorine dioxide ClO
tive application concentration and exposure time. For example, the application
concentration for hydrogen peroxide is 150 mg H
/l and the exposure time 24
hours. Appendix A contains further information about these disinfection chemicals,
e.g. about application and work safety. Appendix B contains statements on the
material resistance to the recommended disinfection chemicals.
Information leafl et “Flushing, disinfection
and commissioning of drinking
water installations” (August 2014) of the German Central Association for
Sanitary, Heating and Air Conditioning (ZVSHK)
, the information leafl et “Flushing, disinfection and commissioning of
drinking water installations” (new version August 2014) of the Central Association
for Sanitary, Heating, Air Conditioning (ZVSHK), Germany, contains the originally
defi ned methods for fl ushing and disinfecting drinking water installations. These are
largely confi rmed by EN 806-4:2010 and the Technical Rule - Worksheet DVGW W
557 (A) October 2012 of the DVGW German Gas and Water Association. It deals
in particular with additional chemical disinfectants and describes thermal disinfection.
Technical Rules for Gas Installations
European standard EN 1775:2007 “Gas supply – gas pipe systems for buildings”
This European standard EN 1775:2007 “Gas supply – gas pipe systems for buildings”
cites in section 6 Testing 6.1.1 “New pipe systems or every existing pipe system on
which work was carried out as described in 8.5, may only be put or put back into
operation when the test prescribed in section 6 have been conducted successfully.”
Air is recommended to be used preferably as a test medium. A strength test as a
function of the maximum permissible operating pressure MOP is demanded followed
by a leak test. “The applied leak test pressure must be:
– at least equal to the operating pressure;
– usually not higher than 150 % of the MOP, providing that the MOP is above
“For pipe systems with an MOP ≤ 0.1 bar, the leak test pressure may not be
The users of this European standard must be aware that detailed national standards
and/or Technical Rules can exist in the CEN member states. In case of contradictions
due to more restrictive requirements in national laws/regulations than in this standard,
national laws/regulations have priority as explained in the CEN Technical Report
Technical Rule – Worksheet G 600 April 2008 (DVGW-TRGI 2008) of the DVGW
German Gas and Water Association
For Germany, the Technical Rule – Worksheet G 600 April 2008 (DVGW-TRGI 2008)
“Technical rule for gas installations” of the DVGW German Gas and Water Associ-
Section 5.6.2 “Safety measures during the tests” defi nes: “The max. test pressure
may not exceed the value of 3 bar. According to section 5.6.3 the tests may be
carried out optionally with compressed air. The following applies according to section
5.6.4: “Pipe systems with operating pressures up to and including 100 mbar are
subjected to the following tests:
c) Usefulness test for systems in operation”
The usefulness test cannot be carried out with REMS Multi-Push.
Industrial liability insurance association rule “Operation of work equipment”,
BGR 500, April 2008, chap. 2.31, Working on gas pipes
This rule of the legal German accident insurance must be observed for Germany.
REMS Multi-Push SL / SLW, electronic fl ushing and pressure testing unit with
2 suction/pressure hoses 1", 1.5 m long, with hose screw fi ttings 1",
1 compressed air hose 8 mm, 1.5 m long, with quick couplings NW 5, for
pressure testing with compressed air,
1 high-pressure hose ½", 1.5 m long, with hose screw fi ttings ½", for pressure
testing with water (REMS Multi-Push SLW).
Caps and plugs for connecting the inputs and outputs of the REMS Multi-Push
and the hoses, to avoid contamination during transport and storage.
REMS Multi-Push SL, electronic fl
ushing and pressure testing unit,
pressure test with compressed air, without accessories 115600
REMS Multi-Push SLW, electronic fl ushing and pressure testing unit,
pressure test with compressed air and water, without accessories 115601
REMS V-Jet TW, disinfection unit
cleaning and preservation unit 115612
Paper roll, pack of 5 090015
Case with inserts for printer 115703
REMS Peroxi Color, dosing solution for disinfection 115605
REMS CleanH, cleaner for heating systems 115607
REMS NoCor, corrosion protection for heating systems 115608
Test strips 0 – 1000 mg/l H
Test strips 0 – 50 mg/l H
Suction/pressure hose 1", 1.5 m long, with threaded hose fi tting 1" 115633
High-pressure hose ½", 1.5 m long, with threaded hose fi tting ½" 115634
Pneumatic hose 8 mm, 1.5 m long, with quick couplings NW 5 115637
Connecting hose compressor/water connections
with 1" hose screw fi ttings and NW 7.2 quick couplings 115618
Pneumatic hose pneumatic tools, 1.5 m long,
with quick couplings NW 7.2 115621
Fine fi lter with fi lter cartridge 90 µm 115609
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