Opening the filter and water gushes out!

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lmow20
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Posts: 3
Joined: Sat 20 Jul, 2019 05:18
My Pool: 75 cm volume, Rectangular. Latex lining. Poltank pt-600 sand filter and a .75kW pump.

Opening the filter and water gushes out!

Postby lmow20 » Sat 20 Jul, 2019 05:38

Hi all,

I have been tasked with changing the sand on my dad's filter. I closed all the three valves (leaftrap intake, side intake and bottom intake.)

I set the multi-port valve to 'closed' and unplugged the power cable. When I unscrew to top lid, water gushes everywhere indefinitely. I don't know where it's drawing from and how it gets through the 'closed' multiport valve. After about 5 minutes I forced the lid back on and screwed it down again.

What am I doing wrong? Is this normal?


Teapot
Pool Industry Leader
Pool Industry Leader
Posts: 1337
Joined: Tue 17 Oct, 2017 10:52
My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
Location: UK

Re: Opening the filter and water gushes out!

Postby Teapot » Sat 20 Jul, 2019 07:03

Plug the returns?
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 2594
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: Opening the filter and water gushes out!

Postby Denniswiseman » Sat 20 Jul, 2019 10:39

Have you tried setting the MPV to BYPASS which cuts out the filter
lmow20
I'm new here
I'm new here
Posts: 3
Joined: Sat 20 Jul, 2019 05:18
My Pool: 75 cm volume, Rectangular. Latex lining. Poltank pt-600 sand filter and a .75kW pump.

Re: Opening the filter and water gushes out!

Postby lmow20 » Sat 20 Jul, 2019 12:53

Brilliant idea. I'll try that.
Teapot
Pool Industry Leader
Pool Industry Leader
Posts: 1337
Joined: Tue 17 Oct, 2017 10:52
My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
Location: UK

Re: Opening the filter and water gushes out!

Postby Teapot » Sat 20 Jul, 2019 14:11

Provided it's not a top mount filter
lmow20
I'm new here
I'm new here
Posts: 3
Joined: Sat 20 Jul, 2019 05:18
My Pool: 75 cm volume, Rectangular. Latex lining. Poltank pt-600 sand filter and a .75kW pump.

Re: Opening the filter and water gushes out!

Postby lmow20 » Sat 20 Jul, 2019 16:06

Thanks for the help folks, I'll try it tomorrow and get back to you. :)

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