Results 1 to 10 of 10
Plumbing & Plumbers Forum - Garage washing
Like Tree2Likes
  • 1 Post By chris watkins
  • 1 Post By snowhead

Garage washing

Discuss Garage washing at UK Plumbers Forums; Guys, loking for advice not sure on this item, a client wants to install wash points for a car dealership forecourt he is suggesting he wants to run the main ...
  1. #1
    Member
    Join Date
    Jan 2010
    Location
    Scotland
    Posts
    65
    Thanks
    13
    Thanked 1 Time in 1 Post

    Default Garage washing

    Guys, loking for advice not sure on this item, a client wants to install wash points for a car dealership forecourt he is suggesting he wants to run the main below ground and come to a low level chamber with his double reg etc, is this acceptable or should they rise from below ground level?

  2. #2
    Member
    ShaunCorbs's Avatar
    Join Date
    May 2015
    Location
    North Wales (so hide all your sheep) :D
    Posts
    10,020
    Thanks
    148
    Thanked 703 Times in 692 Posts

    Default Re: Garage washing

    If it's sealed I can't see a problem
    IMPORTANT:
    Carbon Monoxide can be produced when ANY fuel is burnt, including oil, gas, wood and coal.

    Want gas safety or boiler repair advice? :
    Please supply your Gas Safe / Oftec / Hetas Number, DIYers, odd job people and have a go heroes need not apply, and remember any fuel burning appliance can kill


  3. #3
    Member
    Join Date
    Jan 2010
    Location
    Scotland
    Posts
    65
    Thanks
    13
    Thanked 1 Time in 1 Post

    Default Re: Garage washing

    as in within a sealed chamber? is a RPZn valve regulation, just that these are a nightmare and no one to service them.

  4. #4
    Plumbers Arms member
    Join Date
    Jun 2012
    Location
    London/Kent
    Posts
    3,988
    Thanks
    197
    Thanked 495 Times in 473 Posts

    Default Re: Garage washing

    If your Bye-laws are the same as our Regs I would say that from what you describe greater protection would be required than that provided by a double check valve.

    What do you mean by a low level chamber ? is the outlet going to be below ground level (or even less than 150mm above)

    What are they going to connect to this outlet ? will it just be a hose for washing the cars would there be chemicals added ?

    Where would the back flow protection device be located ?

    Need a bit more info first.

  5. The Following User Says Thank You to chris watkins For This Useful Post:


  6. #5
    Plumbers Arms member
    Join Date
    Jun 2012
    Location
    London/Kent
    Posts
    3,988
    Thanks
    197
    Thanked 495 Times in 473 Posts

    Default Re: Garage washing

    Quote Originally Posted by Chalmers7 View Post
    as in within a sealed chamber? is a RPZn valve regulation, just that these are a nightmare and no one to service them.
    RPZ's must be above ground as they must have an AA air gap to there discharge pipe.
    and they are only good for Cat 4 hoses at ground level would I am sure be Cat 5.

    Break tank with AB air gap & booster pump to feed them all would be my solution.
    snowhead likes this.

  7. The Following User Says Thank You to chris watkins For This Useful Post:


  8. #6
    Member
    Join Date
    Feb 2011
    Posts
    2,035
    Thanks
    1
    Thanked 250 Times in 240 Posts

    Default Re: Garage washing

    Quote Originally Posted by Chalmers7 View Post
    as in within a sealed chamber? is a RPZn valve regulation, just that these are a nightmare and no one to service them.

    I'd say they are looking for just below ground accessible chambers so they can drive over them.

    As Chris, Break tank and boost pump only.

    See also;
    http://www.arrowvalves.co.uk/media/w..._2-HU_Taps.pdf


    Where the tap is intended for car washing, degreasing plants, industrial areas
    or where there are likely be chemicals (including insecticides)etc., the water company may deem the risk to be Fluid Category 4 and an RPZ Valve (BA device) could beused.
    The RPZ valve would ideally be inside the building,
    otherwise it should be frost protected in an insulated cabinet.
    Where there is no building the Arrow Valves Standpipe model SPBAprovides a solution.
    The regulations are concerned with the minimum level of protection and it is acceptable to provide a higher level of protection e.g. sing a dedicated Break Tank with Type AB air gap can be used for all applications without conditions.
    In situations where it is not practical to use a standpipe, the Arrow Valves below ground hose union tap assembly model HUBG provides an alternative.
    Since the outlet is clearly less than 150 mm above the ground, it is necessary to supply this from a dedicated Break Tank with type AB air gap (“Boost-A-Break” -model BTAB) –not directly from a supply pipe.
    Last edited by snowhead; 19-11-2015 at 07:23 PM.
    chris watkins likes this.

  9. The Following 2 Users Say Thank You to snowhead For This Useful Post:


  10. #7
    Plumbers Arms member
    Join Date
    Jun 2012
    Location
    London/Kent
    Posts
    3,988
    Thanks
    197
    Thanked 495 Times in 473 Posts

    Default Re: Garage washing

    Oooo new sheet from Arrowvalves, I like the little L/L hose outlets they are new!!

  11. #8
    Member
    Join Date
    Jan 2010
    Location
    Scotland
    Posts
    65
    Thanks
    13
    Thanked 1 Time in 1 Post

    Default Re: Garage washing

    Guys some great comments and the link was really helpful, they were looking for this connection to be in a chamber below ground level so they can drive over it, likewise I thought a break tank would be required as the level of cover that's required. the utility company will advise on what level of cover so its worth the call.

  12. #9
    Member
    Join Date
    Feb 2016
    Location
    Wetherby, Yorkshire, UK
    Posts
    24
    Thanks
    13
    Thanked 2 Times in 2 Posts

    Default Re: Garage washing

    Hmm. How about putting a large break tank (such as used to boost poor incoming mains) fed via a pt 2 valve with twin non return valves off main and then pumping to these outlets. I'm assuming its only going to one or two at a time. That way no RPZ valve requirement! Higher up front cost but low cost of ownership and simply removed when reqd... Just my two penneth.

  13. #10
    UK Plumbersforums Trusted Advisor.

    tamz's Avatar
    Join Date
    Apr 2010
    Location
    Scotland
    Posts
    13,973
    Thanks
    409
    Thanked 1,717 Times in 1,526 Posts

    Default Re: Garage washing

    In a past life i used to do forecourt work for Gulf in Scotland and it was all inspected and signed off by Scottish water. All carwashes except for the jet wash machines were cistern fed and pumped from a tank house.
    Jet wash machines were fed from a washing machine valve and a double check and whatever else gubbins was in the machine (i never hung around long enough to see exactly what was in there)

Everybody loves a good deal: Deals and Discounts on Dozens of Powertools!
Everybody loves a good deal: Deals and Discounts on Dozens of Powertools!

Similar Threads

  1. What's in your garage?
    By IDCHAPPY in forum General Off-Topic Chat
    Replies: 72
    Last Post: 26-02-2014, 10:07 PM
  2. will it fit in the garage
    By gas man in forum General Off-Topic Chat
    Replies: 6
    Last Post: 16-04-2013, 08:06 PM
  3. uk garage
    By stevetheplumber in forum General Off-Topic Chat
    Replies: 25
    Last Post: 08-01-2013, 10:27 PM
  4. Radiators in garage
    By surfingmonkey1 in forum Central Heating Forum
    Replies: 6
    Last Post: 25-02-2011, 09:31 PM

Visitors found this page by searching for:

Nobody landed on this page from a search engine, yet!

Tags for this Thread


Try our Talk Electrician Forum and our popular Tilers Forums for more free advice from professional tradesmen.
Tens of thousands of tradesmen and over 2 million combined posts.


Plumbers Forums is a community-driven forum shared between all members.