Question: What size pipe is used?
What size of PVC pipe should I use to connect the PCS3 to my pool support system?
SolarAttic recommends using 2 inch pvc pipe for reduced friction losse to and from the PCS3. A simple reducing bushing can connect the 1 1/2 pipe to the 2 inch pipe. In addition, the bypass valves are constructed to accept 2 inch pipe directly if used.