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SunTouch Pool and Spa Control System Installation and User’s Guide

Plumbing Requirements

It is important that the pool and spa plumbing system be in accordance with local codes and the Recommended
Hydraulic Schematics. Before starting, please review the diagrams and the following recommended guidelines:
The spa should be at or above the level of the pool.
If the spa is attached to the pool, provide a dam between the two bodies of water to allow the spa to
overflow into the pool. If the spa is not attached to the pool, an overflow, sufficient in size to carry a full
pump-flow, must be installed at the water level in the spa.
Plumb a three-port Intake Valve (VLV A) on the suction-side of the filter pump, so that the center port
of the valve is connected to the pump inlet. Connect the spa suction to one side of the Intake Valve, and
the pool suction to the other side.
Plumb a three-port Return Valve (VLV B) on the return-side of the heater, so that the return water will
enter the valve through the center port.
Connect the spa return to one side of Return Valve, and the pool return to the other side.
If required, install a spa makeup line (consisting of a manual gate or ball valve, for elevated spas install a
check valve) to bypass the pool return line. This will enable some of the chemically-balanced water from
the pool to cycle through the spa. The manual valve will allow the amount of bypass to be adjusted.
For systems which incorporate a skimmer, it is possible to balance the amount of suction between the
skimmer and main drain for maintenance purposes. This is easily accomplished by installing a manual
three-port mixing valve at the suction line. Plumb one port to the skimmer and the other to the main drain.
If a “non-booster pump” pressure-side pool cleaner is being used, plumb a manual three-port valve
between the filter pump and filter, with the third port plumbed to the pool cleaner line, and install a
motorized two-port Pool Cleaner Valve at this line. The motorized valve will automatically open
whenever the SunTouch activates the pool cleaner.
If a booster pump pool cleaner is being used, plumb the booster pump so that its suction-side is connected
to the pool return, after the heater, and as close to the ground as practical.
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