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804050US v1.27 06.21 CS175 Install Instruction
Commissioning
All HydroTap models that have sparkling/carbonated water functionality include the following integral Backflow
Prevention.
Main Water Inlet
The Dual Check Valve (DCV) on the Mains
Water inlet connection is designed to ensure
a uniform direction of flow throughout the
HydroTap. This valve configuration eliminates
any possible contamination of the mains water
supply, caused by backflow or back siphonage
and is the is a secondary safety feature in the
case where the of the inlet safety solenoid.
The DCV also maintains a constant pressure
upstream of the inlet safety solenoid. There are
two (2) operating principles:
• Firstly, one check valve will still act, even if the other is jammed open;
• Secondly, the closure of one valve reduces the pressure differential across the other, allowing a more
reliable seal and avoiding the possibility of minor leakage.
The HydroTap MUST NOT be operated without the Dual Check Valves in place.
Internal Carbonator
There are two (2) Check Valves on the internal
Carbonator. The Check Valves ensure the flow
of CO2 gas and water is maintained in one
direction, into the carbonator. These valves help
to maintain the pressure needed to ensure the
gas remains dissolved in the water while inside
the carbonator. The Check Valves are designed to stop any backflow of gas and/or water out of the internal
carbonator.
In addition to the HydroTap’s integral Backflow prevention
Some authorities require additional Backflow Prevention to be installed to comply with the Local, State or
Federal plumbing code requirements. Both the Universal Plumbing Code (UPC) and National Standard
Plumbing Code (NSPC) require the use of an American Society of Sanitary Engineers (ASSE) 1022 backflow
preventer on the supply to carbonators under UPC 603.5.12 and NSPC 10.5.8.
UPC:
“Potable water supply to beverage dispensers, carbonated beverage dispensers, or coffee machines
shall be protected by an air gap or a vented backflow preventer in accordance with ASSE 1022. For
carbonated beverage dispensers, piping material installed downstream of the backflow preventer shall not be
affected by carbon dioxide gas”.
NSPC:
“The water supply to a carbonated beverage dispenser shall be protected against backflow with an
integral backflow preventer conforming to ASSE 1022 or an air gap. Carbonated beverage dispensers and
carbonated beverage dispensing systems without an integral backflow preventer conforming to ASSE 1022 or
an air gap shall have the water supply protected with double check valve and atmospheric vent conforming to
ASSE 1022.”
In order to comply with this requirement the Installer MUST install an ASSE 1022 approved backflow device
on the water supply leading to the HydroTap. This will ensure compliance with the requirement to protect the
potable water supply to the carbonated beverage dispenser.
5.5
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Backflow Prevention
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