plumbing with RADWELD pipes

[kevinmachell]

Hello, can anyone help? My house was built in the 1970`s during the worldwide copper shortage. Stainless steel " RADWELD" piping was used throughout using normal compression fittings. My question is, can I use pushfit fittings on these pipes? or will they leak?
many thanks kev

 

[Hot&Cold]

The 1970's pipes could be imperial sizes so pushfit is not going to work.

Compression fittings only on your existing pipe, adapted to metric if necessary then run in copper or plastic.

 

[kevinmachell]

Many thanks for your reply. I understand what you are saying, However, if the radweld is metric, could pushfit be used or is the stainless pipe not soft enough for the pushfit teeth to grip into? thanks

 

[ianmcd]

no you cant use speedfit

 

[Smithy the plumber]

1/2" pipe will match 15mm but 3/4" will have to adapt to 22mm use only compression joints on the old pipe then you can use push fit on new pipes only .

 

[kevinmachell]

ok many thanks everyone. Compression it is.

kev

 

[oilboffin]

If I was you I'd rip all that crap out itll cause you trouble later on.Bob

 

[Happyplumber]

Compression only,this system is definetly not to be used with push fit which rely on grab ring to stop it beinf oulled off and 5hus copper is soft enough to accomplish this

 

[SandyLyon]

Pushfit installation instructions state not to be used on chrome, stainless steel, carbon steel etc.

Basically the surfaces are too hard for the teeth on the grab ring to "bite"

 

[kevinmachell]

many thanks Sandy, This is exactly what I feared. thanks for confirming it