Plumbing requirements – Pentair EasyTouch Pool/Spa Control System LX-100EZ User Manual
Rev. F 3-26-04
Plumb system in accordance with “RECOMMENDED HYDRAULIC SCHEMATIC” on page 6, local codes
and the following guidelines.
Bring all lines back to the equipment pad.
1. Spa should be at or above the level of the pool.
If spa is attached to pool, provide a dam between the two bodies of water to allow spa overflow into
pool. If spa is not attached to pool, an overflow, sufficient in size to carry full pump-flow, must be
installed at water level in the spa.
2. Plumb a three-port Intake Valve on the suction-side of the filter pump, so that center port of valve is
connected to the pump inlet.
Connect spa suction to one side of Intake Valve, and pool suction to the other side.
3. Plumb a three-port Return Valve on the return-side of the heater, so that return water will enter valve
through the center port.
Connect spa return to one side of Return Valve, and pool return to the other side.
4. A ½” spa make-up line (incorporating a ½” manual gate or ball valve and, for elevated spas, a ½” check
valve) may be provided 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
5. If the spa is to be constructed in concrete, special provision should be made at this time for the installation
of the optional Spa-side Remote Control.
Select a convenient location in the deck or above water level in the spa wall (where the Spa-side Remote
will not be submerged by the spa water), and install a 6” to 12” length of 1-½” PVC pipe to provide a
receptacle for the Spa-side Remote. The pipe should be level and protrude beyond the finished surface of
the spa. It will be cut back at a later date.
Reduce pipe size down to ½” or ¾” conduit, and run to proposed LX-100 RF Power/Load Center
location at equipment pad. Use sweep elbows for turns.
The Spa-side Remote will not be installed until spa construction is complete.
6. 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.
7. 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 Control System activates the pool cleaner.
8. 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.
9. If optional water sensor is used with Cp-100 indoor controller, locate between filter pump and filter.