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UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: harleyman on November 03, 2019, 02:47:07 pm

Title: Any body know what a back flow preventor is
Post by: harleyman 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??????

Title: Re: Any body know what a back flow preventor is
Post by: nathankaye 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.

Title: Re: Any body know what a back flow preventor is
Post by: Don Kee 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

Title: Re: Any body know what a back flow preventor is
Post by: CleanClear on November 03, 2019, 04:21:09 pm

Quote from: harleyman 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??????

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