WEll I just tried pinching off the lines and here are the results:
Outlet line closed off; no change, actually got a little bit louder (higher pitch)
Inlet Line closed off; a bit quieter but could hear that the impeller was NOT happy.
Both lines closed
But now looking at the system again, there is far too many air bubbles in the WHOLE loop. My water is now WHITE there is soo much air in the loop. There has to be a leak some where. I think I even know where it is too.
This Sedra does not have a screw down inlet housing. It has a latch type setup where you twist the housing CCW to release two latches and then pull apart. There is an O-Ring that is suppose to keep a seal between the parts but I suspect that it is not keeping a very tight seal.
What can I do to help seal off that part of the pump? Vasoline/Petroleum Jelly? Teflon?
Next time I take the pump apart I will also redo all the fittings on the pump inlet with more teflon to make sure that they are not leaking as well.
I guess I should also bite the bullet and get some new fittings and 5/8" vinel to put on the intel side too
