black alkathene

[mikegas]

hi ive got to change a leaking stop tap which comes off black alkathene mains. Will a 22mm stop tap fit the existing nut off the leaking stop tap?

 

[ecowarm]

What size black alk is it?

3/8" 1/2" or 3/4

Have a look here at the Imperial to metric couplings

[DLMURL="http://www.plasson.co.uk/main.asp?product_id=10430&cat=products&sCat=product&sel_nav1=49&sel_nav2=231"]Plasson UK PlassOne - Simply Push to Fit - PlassOne Fittings[/DLMURL]

 

[mikegas]

looked like 3/4

 

[ecowarm]

If its 3/4" OD its 1/2"

if its 1/2" OD its 3/8"

and if its 1" OD its 3/4"

 

[mikegas]

The stop tap looked like a 22mm inlet with a 15mm outlet with drain off. Will a 22mm stop tap with a 15mm reducer on the outlet fit in its place or will i have to take the existing nut an olive off an get a fitting on the black alk to take it to metric stop tap?

 

[ecowarm]

I would convert to metric, but you could try a 22mm s/t but i dont think the existing nut will fit.

 

[PlumbBobBob]

i've changed a couple of these, the existing nut won't fit a new 22mm stop tap you will have to remove the old one and olive and just use a 22-15 reducer for the top fitting.

 

[helpsy]

I did one and had to get a plasson adaptor.

 

[bedspoolplayer]

hi done this before 22mm stopcock black pipe imperial olive other end use 22 to 15 reducing set hope this helps

 

[tamz]

You will need an adaptor. The neatest are the Kuterlites (K1710KP). Get them from most merchants. Or use a philmac or plasson fitting if you have the space.
The valve that is fitted is probably a Kuterlite valve.