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Discuss Mystery valve on CH primarys in the Central Heating Forum area at UKPlumbersForums.co.uk.

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  1. Tom Williamson

    Tom Williamson New Member

    Can anyone help identify this valve. LH 28mm is fed from a Ideal Mexico (being removed). HW is (was) gravity on separate 28mm so this is just heating only. I realise there will have been a handle at some point.

    IMG_3291.JPG

    IMG_3295.JPG
     
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Looks like it could of been an old servowarm selecter valve
     
  3. Tom Williamson

    Tom Williamson New Member

    Would it have the capacity to incorporate a solid fuel fire with back boiler?
     
  4. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Would say no
     
  5. Tom Williamson

    Tom Williamson New Member

    Pipes dissapear under a concrete then laminate floor so having difficult to identify what all 4 do. Flow from Mexico, then maybe upstairs/downstairs heating but can't work out other?!
     
  6. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I would say fill and safety vent combined maybe
     
  7. Tom Williamson

    Tom Williamson New Member

    Traced Feed and Vent on the HW primarys so they are separate,still stratching my head!
     
  8. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    What do these letters say?

    IMG_9739.PNG
     
  9. Ric2013

    Ric2013 Plumber Top Contributor!!

    GKN on the bolts? Doesn't GKN make car driveshafts?
     
  10. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Looks like s***N
     
  11. quality

    quality Plumber GSR

    S-GM-X proportioning valve
     
  12. Tom Williamson

    Tom Williamson New Member

    Customer had found original documents from 1963. LH is flow from boiler. Up is Upstairs heating, down is downstairs heating and RH 28 is tee back into return, so a bypass. Pretty clever stuff
     
  13. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Was about to reply that the only thing I could find remotely close was an old Sloan valve
     
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