I am hoping someone can help me with several issues related to a Polaris Zodiac Halycon / PB4-60Q booster pump. We purchased a home that has this pump plumbed as shown in the attached photo. photo 2 (1).JPG
The pump leaks slightly near the bottom of the area where the volute attaches to the back plate. I replaced the shaft seals and re-lubed the o-ring to no avail. (I did neglect to lube the rubber part of the shaft seal insert before installing, but hopefully there was still a good seal). I see the Jandy instructions indicate that RTV silicone can be placed on the "sealing surface" of the volute, 1/4" from the inner diameter of the sealing surface. I am not sure where that would be given that this would seem to be very near to the o-ring (unless it is intended to go over the o-ring once installed).?
Does this suggest I need a new volute or pump? Or that perhaps I somehow damaged or improperly installed the new shaft seals? (I believe I was reasonably careful to not contaminate the mating surfaces).
As a secondary question, while trying to service the pump now that the pool is running, I cannot seem to stop waterflow to the pump. I closed the Jandy valve upstream from the booster (which feeds a pool return line) and also plugged the return line with a rubber stopper in the pool. I also plugged the side cleaner inlet with a rubber stopper. The pump inlet seemed to still provide water endlessly with no diminution in pressure. What can I be missing? (the equipment pad is well down a hill from the pool level).
If I try to remedy this situation, should I cut the PVC inlet to the booster and insert a ball valve and a union? (I assume I can glue the ball valve in even with the water at a reasonable gush). This might make future servicing or replacing of the pump easier as it would appear to be glued to hard piping.
Any help that can be provided for my woes would be most appreciated.