Non return valve on the cold supply?

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  • July 18, 2011 at 5:30 pm #63996
    jason1970
    Participant

    Has anyone heard of a requirement, in a commercial situation (in this case a vets practice), for needing a non-return valve between the cold supply and a washing machine? South West water specify it must be fitted or the washing machine must have a ‘certificate’ that confirms it can’t ‘pollute’ the incoming water supply? This is a new one on me!

    July 18, 2011 at 6:14 pm #355750
    iadom
    Moderator

    Re: Non return valve on the cold supply?

    There are several posts here on that very subject, damned hard to find with a search though.

    I think most of them relate to the outgoing water though.

    AFAIK all machines made for many years now have some form of air break to prevent any contamination of the mains supply.

    July 18, 2011 at 6:31 pm #355751
    jason1970
    Participant

    Re: Non return valve on the cold supply?

    Thanks Iadom. I found the posts and (obvious) problems with non return valves on the outlet hose but on the inlet it’s a new one on me. Just concerned as I don’t want to supply my usual Bosch machines and find the customer isn’t happy! I’ll keep digging! Incidentally the Whirlpool machine they had, does have the required certificate, but he can’t find it?!?

    July 18, 2011 at 6:40 pm #355752
    Seamy
    Participant

    Re: Non return valve on the cold supply?

    I remember them coming with Miele commercial washers to comply with WRAS regulations , they’re like this..


    http://www.screwfix.com/p/15mm-x-washing-machine-valve-with-check-valve/27660?source=aw&cm_mmc=AffiliateWindow-_-DeepLink-_-Na-_-Na

    July 18, 2011 at 6:56 pm #355753
    jason1970
    Participant

    Re: Non return valve on the cold supply?

    Thanks very much Seamy. Good info I’ll track down that link, not working at the moment. I guess though that once a non return valve is fitted correctly, any machine will comply with the regs? Cheers

    July 18, 2011 at 7:05 pm #355754
    iadom
    Moderator

    Re: Non return valve on the cold supply?

    Link working fine for me. 😕

    July 18, 2011 at 7:44 pm #355755
    jason1970
    Participant

    Re: Non return valve on the cold supply?

    Link only gets me as far as screwfix but a blank page, have searched the site and found the right valve. Thanks all for the help!

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