Gasboy 580 - Manual (Page 10)

GASBOY Series 580 Pumps
2-4 03/07/03
SUPPLY LINE
Use new galvanized or fiberglass (see note) pipe, 1 1/2" (38.1mm) minimum diameter.
NOTE:
Fiberglass pipe is to be installed according to manufacturer’s specifications and
requirements.
Be sure both the pipe and the tank are clean. Foreign matter entering the pump can cause
extensive damage. Obstructions in the supply line can create pump problems and reduced flow
rate.
Make sure all pipe threads are properly cut and the inside reamed to remove burrs. Use Listed
gasoline-resistant compound on all joints of gasoline handling piping. Sealing compound must
also be resistant to Gasohol (Ethanol and Methanol). Do not use Teflon Pipe Sealing Tape. Use
gasoline-resistant pipe compound on male threads only; pipe compound used on female threads
can be squeezed into the supply line where it can enter the product stream and become lodged in
the pump or meter. Install swing joints under the pump and at the tank to avoid breaks in the
supply line from settling or frost heave.
To avoid product delivery problems on suction pumps, be sure there are no traps in the supply
line. Supply lines should go straight down beneath the pump to a point 18 inches (45.7cm) below
the ground level and pitch at a rate of 1/8 inch (3.18mm) per foot (.305m) from there down to the
storage tank. The supply line should be as short and direct as possible with swing joints at all
turns. Support the horizontal run of pipe at 10-foot intervals to maintain pitch and prevent traps.
Do not use wood as pipe supports. No additional check valves are required as the suction pump
contains an inlet check valve.
Upon completion of installation, all liquid-carrying lines must be checked for leaks.