and yet another one for the plumbers

[Paddy Galore!]

i want to tap into some rad pipes from the other side of a wall, is it ok to use those posh copper/brass push fittings to join old pipe with the new?

i hate trying to solder onto old pipe, half the time it just goes wrong and i get water and crud blowing out the joint.

cheers for any help.

Paddy.

[-Mongrel-]

Should be...

 

...IF, you cut the pipes with a proper pipe cutter which will leave a clean 'chamfered' edge, IF you clean all paint and muck off the pipe to leave clean metal and IF there are no dents or scoring on the pipe.

 

Basically these joints seal on an O-ring, anything preventing that O-ring from touching the pipe all round will result in leakage!

[mark@mbb]

Paddy when we used to connect to lead we had to push bread down the pipe to absorb the water that escaped before wiping a joint

[Paddy Galore!]

Should be...

 

...IF, you cut the pipes with a proper pipe cutter which will leave a clean 'chamfered' edge, IF you clean all paint and muck off the pipe to leave clean metal and IF there are no dents or scoring on the pipe.

 

Basically these joints seal on an O-ring, anything preventing that O-ring from touching the pipe all round will result in leakage!

thanks, got pipe cutters,

so they're ok with all the gunk that flows through a central heating system?

Paddy when we used to connect to lead we had to push bread down the pipe to absorb the water that escaped before wiping a joint

really? well, everyday's a school day

thanks

[figgy]

There are a few types that look ok Tectite is one that don't look to bad.

 

Soldered joints are still better just clean the pipe well with a clean strip and push a bit of dowel up and down inside the pipe to push out the water then you can solder till your hearts content.

 

Figgy

[Paul223]

A wet pipe producing a touch of steam will kill the flux, and result in a bad joint, so after removing paint and wirewooling to a bright finish on the outside dry the pipe as beast as poss on the inside with a rag, heat it up enough to dry out leave to cool a tad, flux then assemble and solder

 

If your really pants at soldering use solder ring fittings rather than end feed

[dodgy dave]

i can just remember doing that and im 70 you must be older than me

Paddy when we used to connect to lead we had to push bread down the pipe to absorb the water that escaped before wiping a joint

[Paddy Galore!]

Guys, i do know how to solder ok but thanks anyway

i just don't like soldering onto old pipe cos half the time it goes wrong

i usually pop an isolation valve on and rework it from there up in the kitchens and bathrooms, but i don't do any of the heating systems hence the question.

thanks again for the advice,

paddy

[-Mongrel-]

Tectite and similar will resist all the gunk in a heating system, although if it really is gunky you'd be well advised to clean and flush it.

 

Trouble with heatng pipes is that if it's on a pipe drop you tend to get a dribble for quite some time...however, a wet'n'dry vac used to suck the pipes dry can be a God send!