Low Flow Gas Buildup...

[Guy559]

Wondering if others have experienced this...

SWCG and system working great overall, especially if I keep VSP at 45% and above.

However, when I sought to follow advice for lower rpms for 24 hours, I get gas buildup in PVC that actually diverts water flow. In this case, the gas seems to buildup in the return pipes, so that over time one of the bubblers on my tanning shelf stops flowing, along with the return to my spa. If I increase rpms toward 80% for a minute, that clears out the built-up gasses (it's very obvious due to gas in discharge from the returns). I could then lower back to 35% and it'll work fine...until gasses build back up.

Wondering if others have experienced this. If I keep VSP at 45% seems to be no issue. Flow rate is high enough to carry SWCG gasses all the way through...though I'd certainly prefer 35% for electrical cost savings.

 

[PoolStored]

Your VSP has programs. Run your program on low for the day, and set one of the programs for 15 minutes at higher speed once a day to clear the pipes.

 

[Jimrahbe]

Guy,

On the surface, it just not sounds right to me...

How sure are you it is 'gas' from the SWCG and not just a air from an air leak on the suction side??

How about running a test with the SWCG off and see if the problem goes away..

Thanks,

Jim R.

 

[ajw22]

35% is about 1,200 rpm. That is very low flow.

45% is about 1500 rpm.

There is not a lot of energy difference between the two at low RPMs.

If things work at 45% I would run there and not worry about it.

 

[Newdude]

Did you remove the puck feeder which was allowing gas buildup ?

If not we should move this back over there.

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[Guy559]

35% is about 1,200 rpm. That is very low flow.

45% is about 1500 rpm.

There is not a lot of energy difference between the two at low RPMs.

If things work at 45% I would run there and not worry about it.

Okay - this. Will just keep it simple.

@Jimrahbe, yes, it's gas buildup from the SWCG. Gets stuck in PVC returns. Sounds like 1,200 rpm (about 28 gpm) is too low to pull the gas back to the returns.