Pentair multiport valve, old. I noticed during startup I tried to use the recirculate function (I rarely used this in the past but converted to SWG last summer and they say get the water close before turning it on)--and I got a small stream of water out the backwash pipe. So I didn't recirculate. Now I notice on filter I see a very small drip out the backwash pipe. Do I need a new valve or can it be repaired? Or do I need to do something? I'm getting a lower pressure reading on my gauge, and I bleed it through the gauge, and it takes about 1/2 second for the water to come out, sometimes a full second. Skimmer and pump buckets both clear, no visible bubbles out the return line.