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harleyman

  • Posts: 432
Any body know what a back flow preventor is
« on: November 03, 2019, 02:47:07 pm »
Been asked about a back flow preventer ain't got a clue i think it's some thing to stop water passing back in to water suply??????

nathankaye

  • Posts: 5366
Re: Any body know what a back flow preventor is New
« Reply #1 on: November 03, 2019, 04:00:35 pm »
Im guessing its a one way valve.
What is it for, as in why have you been asked?

Ones may use one, if they have a flat tank as they are prone to air traps and this would prevent it. From tank to pump.
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Don Kee

  • Posts: 4878
Re: Any body know what a back flow preventor is
« Reply #2 on: November 03, 2019, 04:15:23 pm »
None return valve, it just makes sure the water doesn’t go in the wrong direction.

In the case Nath mentions, it stops the water travelling backwards and being replaced with air
Why don't you have a quick google before making stupid comments?

CleanClear

  • Posts: 14717
Re: Any body know what a back flow preventor is
« Reply #3 on: November 03, 2019, 04:21:09 pm »
Been asked about a back flow preventer ain't got a clue i think it's some thing to stop water passing back in to water suply??????

Non return valve :
https://www.suctionhose.co.uk/products/brass-non-return-valve-swing-check?

Some information here on why they are needed :
https://www.aquacure.co.uk/buyers-guides/mains-water-installation-kits
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