Air bubbles in return

[my06mustanggt]

I have a hayward Tristar pump. When the pump runs on a low speed I get bubbles coming out of the returns. At full speed no bubbles any ideas thanks

 

[Texas Splash]

One thought is the pump lid. Be sure it's has a good coating of pool silicone lube. On low speed there's not as much suction in that area which could let air in. Then you switch to a higher RPM and it pulls the lid down tighter. Lube might help or may not depending on if that's the true problem. But I would check that first. Also be sure the bubbles aren't related to your SWG on cycle.

 

[my06mustanggt]

I'll try the lid. It's not the swg I Checked that thanks

 

[my06mustanggt]

I added lube to the lid it's better I just ordered a new o ring. Hopefully that's it

 

[PoolGate]

Why don't you think it is the SWG? Have you tried lighting the bubbles? If from the SWG they are hydrogen and will "pop" when lit.

 

[my06mustanggt]

How would I light them

 

[PoolGate]

How would I light them

I just hold a lighter over the water where they come to the surface.

 

[my06mustanggt]

I did that and it does pop. So that means it's the swg right

 

[PoolGate]

I did that and it does pop. So that means it's the swg right

Yep - SWG byproduct - Hydrogen bubbles. Mine has a constant stream. If you turn the SWG off, the bubbles should stop. Higher pump speeds probably are pushing the bubbles towards another return or just diffusing them better so you don't notice them.

 

[my06mustanggt]

Good to know thanks