10. Bottom End Plumbing
A typical plumbing layout is shown in Fig (30). The tie-in for the solar plumbing is always down-
stream of the lter. You may use 1½” PVC pipe for the bottom end plumbing; however, you should
use 2” PVC pipe where possible. 2” PVC pipe is recommended above the 3-way and tee.
Always use PVC cleaner on all pipe ends and tting sockets. Use a generous amount of PVC
glue on pipe ends and tting sockets, immediately inserting with a twisting motion. Hold to-
gether for at least 30 seconds. Follow the instructions on the cleaner and glue can for proper
use. Determine the layout of all the valves and ttings before proceeding. Cut the line after
the lter in an area with enough clearance for the new ttings. Install a check valve between
the lter and the 3-way valve, with the ow pointing away from the lter (the cone inside the
check valve will be facing towards the lter). Be certain not to allow glue to seal the cone
inside the check valve.
Typically the 3-way is mounted against the wall of the building approximately 3’ to 4’ o the
ground with the side outlet facing right and the inlet facing down. Use a 2½” galvanized
pipe clamp over the bottom inlet of the valve to secure it to the wall with screws. Plumb into
the “inlet” of the 3-way valve from the check valve. The plumbing then continues up the wall,
around the eave and onto the roof feeding the solar panels. The side outlet of the 3-way
valve connects to the side outlet of the 2” tee. The return from the solar connects to the top
of the tee. The bottom of the tee returns to the line going to the pool jets. Install a check
Fig (30): Bottom End Plumbing
Solar Pool System
Installation Manual
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