C
HAPTER
2:
S
YSTEM
P
IPING
Optional Isolation Valves
• Isolation valves may be installed in the collector piping so that the pool may be operated while the collectors are
being serviced or during freezing weather. Install a manually operated ball valve in the collector inlet line and a
check valve on the collector return line. Both valves, available in the
Optional Supplemental System Isolation Kit
(Part #12033-5) are made to accept either 1 1/2” or 2” PVC pipe. Make sure that the arrow on the check valve is
pointing away from the collectors, and that the ball valve and check valve are located close to the control valve
and outlet ‘T’, respectively.
• For further precautions in warm climates where pools are operated year round and periodic freezes can occur, a
bypass line (small diameter tubing,
See Page 21
) can be located above the ball and check valve so as to prevent
any accidental trapping of water in the collectors by the pool owner. To make sure no water is left in the collectors
for servicing or during freezing conditions, remember that the pool pump should be shut off, allowing the
collectors to drain naturally, before the optional isolation valves are used.
• If the system is installed on a commercial or public pool, local codes may require positive isolation valves in the
collector feed and return lines.
19
