CHECK VALVE
AND
STRAINER
The following illustration shows methods of installing tubing for the vac-
uum breaker that terminates in the vapor space at the top of the tank.
The tubing must terminate in the vapor space; if the tubing terminates
below the liquid level of the tank, the vacuum breaker will not prevent
siphoning. It is also very important that there are no liquid traps in the
tubing. The tubing must have a continuous slope from the pump down
to the tank. If the pump is installed below the top of the tank, the tubing
may slope both ways from a single high point above the tank.
Alternately, tubing can be piped to any available opening on top of tank
if the tank adapter is not used. Use reducer bushings as required.
Fill-Rite recommends using the vacuum breaker tank adapter with a
1/4” npt opening in the side of the hex portion that terminates in the
vapor space of the tank. Install tank adapter per instructions found in
this manual. Make liquid tight connection from the adapter to the vacu-
um breaker using a minimum of 1/4” metal tubing compatible with the
liquid being pumped. If a vacuum breaker tank adapter is used and the
1/4” npt opening is not used for the tubing, plug the opening liquid tight.
The pumps are shipped with a threaded vacuum breaker installed.
Fill-Rite recommends that the vacuum breaker be tubed back to the
tank. The vacuum breaker is used to break a siphon should an open
nozzle or a leaking hose be below the fluid level in the tank with the
pump turned off.
