3/4" blanking caps

[Dannyparty92]

Purchased some 3/4" blanking caps from tool station today and I didn't check them until I got home but they didn't come with any rubber washers inside. I need to blank off a wheelhead valve because the rads been removed for decoration and the valve still leaks. Will a fibre washer in the inside of the blanking nut do I will I need to the black round rubber washer?

 

[Howsie]

It should do. You could always rub a little LSX on the end or put some L55 or PTFE round the thread.

 

[Dannyparty92]

Yeah I was thinking of pasting the fibre washer it's only thin but is the correct size and putting some PTFE around the thread.

 

[Dannyparty92]

Is there anywhere that sells the round 3/4" washers on there own?

 

[Howsie]

BES I'm sure or your merchant will bung you a couple I'm sure.

 

[Dotty]

I just use standard 3/4" black iron caps and a couple of wraps of ptfe.

 

[PlumbBobBob]

i've got those brass caps in 1/2, 3/4 and 1". come in very handy

 

[stevetheplumber]

I just use standard 3/4" black iron caps and a couple of wraps of ptfe.

22mm fittings dont have 3/4 threads unfortunately bit of ptfe should work though danny

 

[kozak1968]

Toolstation do them in bags of 100, check out the washer section

Is there anywhere that sells the round 3/4" washers on there own?

 

[kozak1968]

The 1/2" and 3/4" blanking discs are handy aswell

 

[Dannyparty92]

Yeah Kozak I noticed them didn't know if they was any good. Spose if it seals the outside in the nut then that's ok. Thank you everyone very much appreciated .

 

[AWheating]

use a washing machine hose washer.

 

[REDSAW]

toolstation sell the rubbers separately for about 50p a pack.
ptfe round the thread is all you need and as said...they wont fit 22mm

 

[PlumbBobBob]

i use them mainly for rad valves and also capping off wm valves

 

[Dannyparty92]

I see them now there called ball valve washers 68p for a pack of two in toolstation.

 

[stevetheplumber]

3/4 caps only fit m/i threads but you can get blanking caps for fittings as well which normally have the rubber in as said washmac hose rubber or tape

 

[Dannyparty92]

The 3/4" blanking cap was a good fit on the valve the 22mm was too big. Yeah iv found the 3/4" rubber washers in toolstation now.