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4. Piping
General
Note
All plumbing work must be performed by a qualifi ed technician. Always follow all local, state and
provincial codes.
A proper installation requires a pressure relief valve, a ¼" female N.P .T. threaded fi tting for the pressure
transducer, and properly sized pipe. Piping should be no smaller than the pump discharge and/or suction
connections. Piping should be kept as short as possible. Avoid the use of unnecessary fi ttings to minimize
friction losses.
Some pump and motor combinations supplied with this system can create hazardous
CAUTION
pressures. Select pipe and fi ttings accordingly per your pipe suppliers' recommendation.
Hazardous
Pressure
Consult local codes for piping requirements in your area.
All joints must be airtight. Use Tefl on tape or another type of pipe sealant to seal threaded connections. Please
be careful when using thread sealant as any excess that gets inside the pipe may plug the pressure sensor and
impeller.
Galvanized fi ttings or pipe should never be connected directly to the stainless steel discharge head or casing as
galvanic corrosion may occur. Barb type connectors should always be double clamped.
Pressure Tank, Pressure Relief Valve and Discharge Piping
The standard HydroPro tank has a pre-charge of 38 PSI. You may set the tank pre-charge anywhere between
10 PSI to 20 PSI below the system operating pressure. Use the higher tank pre-charge setting if the system
drifts over 5 PSI at a constant fl ow rate. Use only "pre-charged" tanks on this system. Do not use galvanized
tanks. Select an area that is always above 34º F (1.1º C) in which to install the tank and pressure relief valve. If
this is an area where a water leak or pressure relief valve blow-off may damage property, connect a drain line
to the pressure relief valve. Run the drain line from the pressure relief valve to a suitable drain or to an area
where water will not damage property. Use a tee to connect the discharge pipe to the pressure tank and house
plumbing. It is allowable to pump to multiple locations.
Warning
Maximum working pressure of Goulds Pumps HydroPro tank is 125 psi. Do not exceed pressure
ratings of household fi xtures.
Pressure Tank Installation and Selection
Warning
EXPLODING TANK CAN INJURE OR KILL
Refer to pump catalog or contact your supplier for maximum discharge pressure of pump. Ensure pressure
rating of pipe is greater than maximum discharge pressure of pump.
Caution
It is likely that the pressure relief valve will open sometime during the life of the system. Plan ahead by
running drain to a location where water will not cause damage.
Diaphragm Tank Sizing and Pre-Set Pressure Recommendations:
Diaphragm type (captive air) tanks are required on these systems.
Total Tank Volume, not drawdown volume, is used to select the proper tank size. The total tank volume should
be approximately 20% of the pump's maximum fl ow. For example, when using a 10 gpm pump the system
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