Unusual Washer Valve for Tap (Twyfords Barbican Sink)

Discussion in 'Plumbers' Talk' started by Jimbo, May 23, 2021.

  1. Jimbo

    Jimbo Screwfix Select

    I need to replace a pair of tap valves. They are quite unusual and any help sourcing something close-enough would be very much appreciated.

    I descaled the valve hence the copper deposition...

    Many thanks!

    Washer-Valve.jpg
     
  2. dcox

    dcox Screwfix Select

    Are they beyond repairing? Older ones like these are usually well made and can be stripped, cleaned, greased, rewashered and reused.
     
    pppmacca43 likes this.
  3. pppmacca43

    pppmacca43 Super Member

    That’s the way I would go too
     
  4. Jimbo

    Jimbo Screwfix Select

    Thanks both. Wire wheel on bench grinder to clean them up? Inside needs a good clean too, not sure what to use on that.

    Shaft is 9.3mm and the o-ring outside diameter 14.3mm - I suppose imperial, but a 9m/14m o-ring do the job?
     
  5. dcox

    dcox Screwfix Select

    Wire wheel on a grinder sounds too fierce for the brass. I’d try an old toothbrush. Then plumbers grease on the innards.

    What does the actual tap look like - just curious.
     
  6. Jimbo

    Jimbo Screwfix Select

  7. FlyByNight

    FlyByNight Well-Known Member

    Strip and clean - no wire brushes or grinders just a toothbrush and water with maybe some citric acid crystals to shift stubborn build ups. Maybe a small triangular Swiss file to clean out the threads. I would not worry about the colour change either, al that has happened is the descaler has taken a microscopic layer off, and the copper has returned whereas the zinc has not - I always use citric acid crystals to descale, it is the main constituent of a lot of commercial products, but way cheaper.

    New O-rings, washers and grease where needed, reassemble.
     
  8. Jimbo

    Jimbo Screwfix Select

    Thank you - any idea which o-rings? I ordered 9mm/14mm but they are not quite big enough to protrude.
     
  9. dcox

    dcox Screwfix Select

  10. dcox

    dcox Screwfix Select

    Do they need changing. Is water leaking up the sides of the spindle?
     
    pppmacca43 likes this.
  11. Jimbo

    Jimbo Screwfix Select

    Yes, and v.stiff
     
  12. dcox

    dcox Screwfix Select

    The stiffness will be the worm drive inside. Cleaning and greasing should sort that.

    I wonder if the gland nut directly below the splines would come off to allow packing to be put in around the the spindle like on a stop tap. That could stop the leaks without changing o rings.
     
  13. Jimbo

    Jimbo Screwfix Select

    Thanks, what did you mean by 'packing'? Please forgive my uselessness!

    The other problem is that the body needs a fibre washer, one of which is missing (hence 96 turns of PTFE being on it when removed). ID 25.4mm, OD 30mm. Presumably these would also need to be done up with some paste to hold them solid - would LSX do?
     
  14. dcox

    dcox Screwfix Select

    Packing: take a length of ptfe tape - about 9” - and twist to make into a string. This is wrapped around the spindle and pushed down the gap between the spindle and tap body, a few turns at a time, before the gland nut is refitted.
     
    Jimbo likes this.
  15. dcox

    dcox Screwfix Select

    Re fibre washer: bound to be available online or try an old fashioned plumbers merchant. As it’s 1” internal you should be ok.
     
    Jimbo likes this.
  16. Jimbo

    Jimbo Screwfix Select

    Finally got the valves cleaned up and refitted.

    For the benefit of the search - probably me in about 10 years time - the fibre washers are 1” (30mm/24mm/2mm), and the o-rings are 9.19mmx14.43mmx2.62mm nitrite (9/14mm leaked).

    FC98E7CE-1DDB-442D-BE74-A619D1E04A8C.jpeg

    Greased with Black Swan SG2 and all seems to be well.
     
  17. pppmacca43

    pppmacca43 Super Member

    Good job
     
  18. dcox

    dcox Screwfix Select

    Looks nice. Well done.
     

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