Pool won't empty even when the sump is fully open

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Taylercorkett94
Pool Newbie
Pool Newbie
Posts: 4
Joined: Thu 19 Apr, 2012 09:30
My Pool: Dont know much about my in ground pool as we have just moved in to a new house with this pool
Location: Surrey

Pool won't empty even when the sump is fully open

Postby Taylercorkett94 » Sat 21 Apr, 2012 11:05

This is going to sound stupid but when I was vacuuming my pool I opened the sump 1/3 of the way, when I was finished I forgot to close the sump and woke up to find my pool half empty. Now I've realised that s few pool lights need replacing and it could do with a clean soo I decided to empty it but it won't for some reason even with the sump fully open the multi-port on waste and the backwash valve open anyone know a reason why, thanks


cpo2go
Swimming Pool Wizard
Swimming Pool Wizard
Posts: 67
Joined: Wed 20 Jul, 2011 01:09
My Pool: 27,000 gal, pebble tec, all Pentair equipment; DE filter, 3/4 hp, 400k heater, Poolvergnuegen 4x Pool Cleaner
Location: santa barbara, ca

Pool won't empty even when the sump is fully open

Postby cpo2go » Sun 20 May, 2012 15:07

It's hard to say, for sure, without being on-site but, it sounds like it is one of two things.
Try plugging your skimmer(s). This will divert all of the suction to your main drain at the bottom of the pool. You may be sucking too much air through your skimmers and causing your pump to cavitate. Or...
It could be that your main drain is capped or in any other way not connected. Attach a vacuum hose to your skimmer and sink it to the deepest part of the pool and turn your pump on. Make sure to plug any vacuum port besides the one you're using. A tennis ball makes a great plug for skimmers.
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