Stopcock - Identifying black pipe dimensions to replace stopcock

[leepoll]

I think the black pipe is black alkathene, we see it a lot on the farms we work on.

 

[glenno1]

I agree with black alkathene,but i would re-pack the gland.Turn off tap undo the small nut, put couple of rounds of ptfe on round the spindle.push nut back in place,tighten up,turn on ,job done

 

[jtsplumbing]

Black Alkathene (LD) low density ! if stopcock is a bit ropey get a new stopcock or outside tap and swap over head unit (Turn off water from outside first)

 

[WaterTight]

Didn't I read on here that that black pipe becomes really brittle when old? If so be dayum careful my man.

 

[kozak1968]

Alkathene comes in various sizes. You can get adaptors to fit various materials. Some plumbers merchants will let you have the various sizes then just return the ones you dont use. It depends how well you get on with the merchant.

 

[dsteves619]

Make sure you support the stopcock/pipework if you are taking the body out to service.

 

[WHPES]

Black alkathene pipe only really becomes brittle with age if it's exposed to sunlight (i.e. UV degradation). This is why blue pipe should never be used above ground where it's exposed to daylight. Modern MDPE black pipe has UV stabilisers in it.

 

[jackplumb]

Looks like Alkathene pipe to me, plumbers merchants do an adaptor from this to standard sizes. Don't forget the inserts though. If you can take a sample and they'll give you the correct fitting.