Tyre valves

Discussion in 'Car and Van Talk' started by Notleks, Oct 15, 2020.

  1. Notleks

    Notleks New Member

    Does anyone happen to know the thread size on a car tyre valve and any suggestions for getting to that size male (so I can screw my compressor to it) from a 1/2” bsp female (15mm hose union back plate)?
  2. AnotherTopJob

    AnotherTopJob Screwfix Select

    I'm not sure exactly what you're trying to do, I assume inflate a tyre from a compressor. Normally the compressor pipework would connect to a female outlet, into which you plug your air tools, including a tyre inflator.
    spannerw likes this.
  3. spannerw

    spannerw Screwfix Select

    I can let you know tomorrow morning when I get to work?
  4. Astramax

    Astramax Super Member

    Use Google and search!
  5. Notleks

    Notleks New Member

    Actually I want to drain down a static caravan. Attaching a tyre compressor to the outside tap back plate and blowing all residual water out of the pipe work will leave it safe against freezing through the winter.
  6. AnotherTopJob

    AnotherTopJob Screwfix Select

    Ok I see. You could buy a tyre valve, cut the rubber end off and push a hose over the stem. You could possibly fit an outside tap to the plate and then connect the hose to that, but normally they have non-return valves.
  7. Notleks

    Notleks New Member

    Thanks for your input. You wouldn’t believe the trouble I’ve had trying to solve this. Normally I’d have gone into the local plumbers merchant and had a rummage round but with covid rules I can’t. I’m sure the valve is either 1/4 bsp or 1/4 npt but which one nobody seems to know. Google included.
  8. AnotherTopJob

    AnotherTopJob Screwfix Select

  9. teabreak

    teabreak Screwfix Select

  10. Notleks

    Notleks New Member

    Thanks everyone for your input especially “Another Top Job” I don’t know how you found that but it looks like just what I need. Firms can do the job for me and charge about £60. There is also a compressor that another firm install in the ‘van connected to the water pipes to do the same job for £299. So you see why I want to do it myself.
    teabreak likes this.
  11. Bob Rathbone

    Bob Rathbone Screwfix Select

    Use a wet and dry vacuum cleaner and suck it out.
  12. Notleks

    Notleks New Member

    Sorry. Job done. A 1/2” BSP male to 15mm Prestex with a car tyre valve pushed in to stick out of Prestex nut and sealed with Gorrila glue. Screwed into tap backplate and all water blown out with tyre compressor. £1:88 for fitting £2 for valve. Well pleased.

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice