Where to put non return valve ??

Pool pumps, pool filters and the plumbing of
swimming pools. Sand filters, cartridge filters,
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Digger11
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Where to put non return valve ??

Postby Digger11 » Tue 18 Feb, 2020 00:03

Hi , My new to me pool that is about 20 years old, doesn’t have a non return valve in the piping and when I turn the filter off, the water flows back so hard it knocks the lid clean off the Skinner box - seriously.
2 questions, the piping is a bit tight, so can I fit the NRV between the pump and chlorinator
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67B24854-9AFB-4111-80BE-DBC61899B7F8.jpeg (133.81 KiB) Viewed 2535 times
?
This will mean it will be mounted in a vertical pipe, is that ok ??
Also, I googled there are flapper valve and spring types, any recommendations ?

Thks
Digger


Digger11
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Re: Where to put non return valve ??

Postby Digger11 » Tue 18 Feb, 2020 00:07

Also, For some stupid reason, I am thinking of fixing the piping up myself, I assume that it is simpler to replace whole sections , especially when there are many bends and cuts and especially when the 40mm pipe is glued straight into the elements such as chlorinator ??
Denniswiseman
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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: Where to put non return valve ??

Postby Denniswiseman » Tue 18 Feb, 2020 03:52

The vertical pipe straight off the pump should be fine. I think a spring type valve would be best as a flapper would need to be horizontal also I've seen them break off
Ideally all component parts should have unions so they can be removed for maintenance
Digger11
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Re: Where to put non return valve ??

Postby Digger11 » Sat 22 Feb, 2020 02:12

Thanks Dennis, good advice

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