Pump draining when not running

Leaks in the pool, plumbing, filtration system, skimmer, ...
Finding & repairing swimming pool leaks.
Robertg
I'm new here
I'm new here
Posts: 1
Joined: Wed 06 Oct, 2021 14:21
My Pool: Inground, kidney shaped but freeflow, Pentair 420 and filter

Pump draining when not running

Postby Robertg » Wed 06 Oct, 2021 14:39

I have a Pentair 420 system and variable flow pump, only been installed (pool+equip) 4 years. I noticed immense bubbling and gurgling when the pump was starting up during the night. I determined one of the valves was likely failed (after searching on here) and proceeded to replace the actuator in it. It is the main drain line. That has not worked, so we just leave the drain line closed/off and run all cycles with just the skimmer line. Could this be a leak? I did the smoke test and do not see the pump etc. sucking any air in... ?


Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 2183
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: Pump draining when not running

Postby Denniswiseman » Thu 07 Oct, 2021 02:01

When the pump is primed and running normally do you see bubbles in the pump pre-filter basket and is there air coming out of the returns
If so then you have a suction side air leak from skimmer to pump
Does the main drain have a valve to close it off
Teapot1
Swimming Pool Pro
Swimming Pool Pro
Posts: 115
Joined: Thu 29 Apr, 2021 00:43
My Pool: 12000 gallons vinyl liner,

Re: Pump draining when not running

Postby Teapot1 » Thu 07 Oct, 2021 02:24

Robertg wrote: I determined one of the valves was likely failed (after searching on here) and proceeded to replace the actuator in it. It is the main drain line. That has not worked, so we just leave the drain line closed/off


It would seem so.
if the pad is above the water line or the seal on the middle of the filter in fact a leak anywhere it would allow the water to run back over time.

Why switch it on and off? Skimmers dont work when the system is off meaning dirt and debris is allowed to sink and then requires more robot or manual cleaning. Running the pump on a lower setting (doubt you have a flow gauge) continuously keeps the skimmers skimming and improves the water quality as slower filtration is better filtration. Don't know how coarse your filter cartridge is so maybe academic.
By example, my pool runs 24/7 turns over the water 4 times in 24 hours and water quality is excellent. I only use 65watts of electricity per hour (1560 watts in 24 hours) which is less than a standard setup uses in 2 hours so massive saving.

Return to “Swimming Pool Leaks”

Who is online at the Pool Help Forum

Users browsing this forum: CommonCrawl [Bot] and 0 guests