Gasboy 9800Q Series - Manual (Page 16)

Installation
Page 3-4 MDE-4340A Series 9800Q Pumps and Dispensers Installation/Operation Manual · January 2006
Supply Line
Use a Model 52 pressure regulator valve with all self-contained models
except 9840Q and 9853QTW1M. These models are not recommended for
aboveground tanks. A zero differential of pressure, electric solenoid valve is
required in the line at the top of the tank. Do not use an anti-siphon valve.
IMPORTANT INFORMATION
Use new galvanized or fiberglass (see note) pipe, 1 1/2" (38mm) minimum diameter. When
installing a 9840Q or 9840QX, 9850Q or 9850QX model, use a minimum of 2" (51mm)
diameter supply pipe to obtain the highest possible flow rate and to reduce the possibility of
vaporization (gasoline only).
Note: Fiberglass pipe is to be installed according to manufacturer's specifications and
requirements.
Ensure that 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.
Ensure that 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, ensure that there are no traps in the
supply line. Supply lines, for both suction pumps and submersible pumps, should go straight
down beneath the pump to a point 18 inches (46cm) below the ground level and pitch at a rate
of 1/8 inch (3mm) 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 (3.05m) intervals to maintain pitch and prevent traps. Do not use wood
as pipe supports.
New EPA regulations require that only one check valve be used per supply line and located
directly below, and as close as practical to the suction pump. Do not use spring-loaded or
union check valves since these will unnecessarily reduce the flow rate and contribute to the
reduction of atmospheric pressure necessary to keep gasoline in a liquid state. Upon
completion of installation, all liquid-carrying lines must be checked for leaks.