I have a newer pool without a main drain instead I have bottom returns to help circulate air. This season I noticed that the pressure coming out of them is less. This is concerning because it usually helps circulate the warm water when the Heater is on. I noticed it also when I cleaning the pool manually I used to have bubbles coming out of them as a gas exchange when the pressure was good. I don’t believe I have a leak because I have not added water since i opened it up and the level looks constant. First I thought the de filter was dirty even though the pressure was fine. I cleaned it off anyway and the flow still low or not as strong. I don’t have anything dripping at the pump or equipment ever since I changed the o-ring on Knuckle couplng on the multiport union. I wonder if there is something stuck in the pipe impeding the flow? I wouldn’t even know how to check for it because my equipment is downhill I would just water back flow into me.
I posted the pics when the pool was getting built since you can see them better
I posted the pics when the pool was getting built since you can see them better