Hi all, I hope you can help me out here with me little problem
I have a 1 Hp Northstar pump. (03 model) This year, I developed a suction side leak. I replaced ALL the o-rings on the pump to include the pump motor seal. (was leaking) Normally this would indicate a leak in the line up stream.
Now, what is confusing to me is I have a shut off valve down stream of my filter that I use to divert water to my pressure side pool cleaner. When the cleaner is properly adjusted, the filter pressure indicates about 20LBS and there is NO air bubbles in the water. When the valve is wide open the filter pressure is about 10LBS and there is a lot of bubbles in the return. I don't understand how a change in pressure would stop an air leak if it was in the supply line so this seems to indicate I have a air leak in the pump that goes away with higher water pressure. ( If I open the filter and run the pump there is a lot of bubbles in the water more so that at 10 LB as stated above.
Since I also replaced the impeller and motor seal, could this be creating the problem. Installed incorrectly, wrong parts. There is no water leaks under the pump.
PS. I did not change the strainer lid cover but the o ring was replaced. That is going to be next.