pump priming above pool

[duraleigh]

Hi, Ted,

Long time....no talk!!

Well, with the loop open to atmospheric pressure AND the pump and filter ABOVE the pool, the water drains out thru the multiport valve until it gets below that level in the filter. It is, of course, sucking air thru the strainer basket and draining the pump at the same time.

My intake from the pump into the MP valve is located about 3" higher than the MP valve outlet. That means by the time atomospheric pressure is allowed to enter the MP outlet and stop the outflow, the water level in the filter is now below the line from the filter to the pump so the water can no longer flow back to refill the pump and strainer basket.

Man, that was a long-winded explanation!!. And I haven't attended a safety meeting in weeks!!

Mizzou may not have this same config on his MP but thought I'd include it to cover all the bases. It'll be interesting to see if this solves his issue. It's a pain opening and closing the five valves on mine but better than waiting five minutes to get a prime and then having to wait for the pump to blow the air out of the filter.

[waste]

Dave, always a pleasure to hear from you and get your take on things. Yes, given the set-up you describe, the effluent valves would need to be closed I just learned how to play with size and color - sorry for shouting
I keep forgetting that the pools I work on, usually ones my company has built, aren't the 'only' way to do things. I'm sure that many of the pool owners here fail to realize that thier pool system isn't necessarily the only one, and that other people may have a completely different setup' (in my case, I'm usually picturing the last pool I worked on for whichever issue is in question)
Mizzo, if you decide to add the check valve and if you have the room, put a union (some folks call them a 'quick disconnect'), on the pool side of the check valve - it will make 'blowing' the lines in the fall easier.