I have a spillover spa with my pool and only one pump - very basic. When in spa mode, suction and return are in the spa only and because some of the jets can be closed, the pressure is higher than when the pump is circulating the pool. Pool circulating pressure is about 7 psi and when in spa mode is varies from 12 to 20 psi depending on how many jets are closed. Of course, when in spa mode I shut off flow to the solar panels. Problem is, the valve that regulates flow to the panels is the kind that has a small hole in it to allow the panels to drain when the pump is off. So the panels are seeing the full pressure of the spa. I noticed it when a few of the spa jets were closed and the panels started leaking at the fittings. I am thinking I should replace the valve with one without a hole, as draining the panels is not a big deal here in south Florida where there is no risk of freeze. Thoughts?