Cast-iron rads

[ShaunCorbs]

I will give that a bash mate The threads are absolutely sound as a pound I checked every single one over as I didn't want to give the customer any comeback on it

if there threads are good then 577 will seal, may be stupid but the thing your treading/ tightening in (rad tail / air plug is good, threaded wise)????

 

[Riley]

The 1/2 - 3/4 rad adapter looks fairly decent. Ran it through my 1/2" die a few times to make sure so not sure that's the problem

 

[jonnyswamp]

Is it the 1/2 " tail that's leaking, or the adapter
If it's the tail, can you use a shouldered type to get a better seal

 

[Riley]

1/2" male valve screwing into newly tapped female thread in radiator

 

[rpm]

BSP & BSPT mixed up, sure it`s not but just throwing that in the ring so to speak.

 

[Riley]

BSP & BSPT mixed up, sure it`s not but just throwing that in the ring so to speak.

Nah thought that too :smile:

 

[oz-plumber]

Are you roughing up the thread on the tail?

Found that with cast iron threads, the cast is very sharp an just tears the ptfe tape off the fitting.

Have found de-burring the outside of the cast iron female thread helps get tape inside thread.
You may also want to run a gal fitting in and out of the thread a few times to loosen nit up a little and take off any sharp edges.

 

[Riley]

Are you roughing up the thread on the tail?

Found that with cast iron threads, the cast is very sharp an just tears the ptfe tape off the fitting.

Have found de-burring the outside of the cast iron female thread helps get tape inside thread.
You may also want to run a gal fitting in and out of the thread a few times to loosen nit up a little and take off any sharp edges.

Good shout mate I'll give it a bash