Do I need skimmer diverter valves if main drain is plumped separately?

Pemolis

Well-known member
Oct 14, 2015
134
Dallas
I have three returns coming from the pool, the skimmers are 1, the main drain is number 2, and the drain for the spa is the third. The spa and main drain has their own valve.

The main drain and the skimmer valve are always open.

Do I need skimmer diverters (UFO's?)

Thanks.
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,219
Tucson, AZ
How are things actually plumbed? It is not clear to me if you have valves on the skimmer and floor drains or whether you multiple skimmers.

Pictures?
 

Pemolis

Well-known member
Oct 14, 2015
134
Dallas
1 valve for both skimmer, 1 valve for the floor drain, 1 valve for the spa.

The floor drain is not plumbed to the skimmer.
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,219
Tucson, AZ
So the 2nd skimmer must be plumbed to the 1st skimmer I suppose. If true, then you would want a float diverter on the 1st skimmer so that you could control how much suction comes from each skimmer.

You could add one at the 2nd skimmer as a fail safe if the water level dropped below the skimmers so that both the skimmer float diverters would drop and reduce the amount of air pulled in and hopefully the pump would continue to pull enough water from the floor (assuming that it is partially open).
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,059
San Dimas, CA (LA County)
If the skimmers only have one hole apiece, then there is no reason for a diverter at all.

Beyond that, I'd have to know if the skimmers are teed together via a hole in the bottom or with pipes. And are there any mysterious openings in the wall below and in line with the skimmers?
 

Pemolis

Well-known member
Oct 14, 2015
134
Dallas
From what I see, no. They seem to be connected via somepipe underneath the pool. There are no mysterious holes that I can see.

Thank you.
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,219
Tucson, AZ
Well that would be a poor plumbing job :(

The float part of the diverter would still be a fail safe to prevent the pump running dry if your water level dropped to far.
 
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