Old Threaded steel pipe to 22mm copper

[EastAnton]

Dear Forum,

Im trying to increase water pressure for my bathroom and need to connect a pump to run from the bath water feed as cant get another pipe from attic tank to pump. The issue I have is that the old pipework is steel threaded and whilst I'm having to do all the work, I dont want to screw up the water supply, as I cant get any local plumbers that want to do the work.

If anyone has adapted the old steel threaded pipe to 22 copper can you please let me know potential problems or how I can do this, or if anyone is Andover based, please let me know.

Have an image but cant upload. I know that it can be done as there is a 15mm pipe coming off further to feed a toilet, but ideally I would like to cut the pipe, run new pipe to pump, then reconnect so that I can get more than a dribble from the basin taps and shower that I want to connect.

Thanks for any help

 

[Rybo_1]

If it's a 3/4 steel pipe then you're after a 3/4 by 22mm female iron. Ptfe up the steel thread. 25 times and the wind on the female iron and then you're away in copper

 

[Ermintrude]

Easy. Cut it out and thread in a brass bsp adaptor. . Use locktight and paste o. Threads

 

[lame plumber]

probably get a better result replacing the old, blocked steel pipework, then no need for pumps etc

 

[leethegasman]

Are you sure it is steel I personally have never seen steel pipework on domestic supply's ?
Could be 20 thread ?

 

[PlumbBobBob]

there is still plenty of steel down my way

 

[tamz]

Ptfe up the steel thread. 25 times and the wind on the female iron and then you're away in copper

You're taking that too far :wink:

 

[EastAnton]

If it's a 3/4 steel pipe then you're after a 3/4 by 22mm female iron. Ptfe up the steel thread. 25 times and the wind on the female iron and then you're away in copper

Thank you Rybo_1 would you know if the measurement for the width of the old pipe is the external size or the internal pipe measurements. Happy to put on the female connector, but not sure if the old pipe work will actually unscrew as looks a tad rusty. Cheers

 

[EastAnton]

there is still plenty of steel down my way

Hi Steve B, would you know anyone Andover Based that could help. Cheers

 

[Clint 1979]

One of these.......

 

[stevetheplumber]

definitely rip it out thats the bit thats limiting your flow rates for sure probably find theres only a pinhole through the middle of the pipe

 

[EastAnton]

definitely rip it out thats the bit thats limiting your flow rates for sure probably find theres only a pinhole through the middle of the pipe

Thanks, but its not that easy as the building is listed and there is no access to the pipes. Flow rate is OK but not good enough to run modern flexi hose taps nor the shower I have which needs a minimum of 2 bar.

I'm confident that I can connect pipes with modern fittings, but my concern is cutting the pipe to try and remove near a thread, because if I cant remove, then I dont have any water as so far 15 plumbers have told me that they ca't do the job until after Xmas or when booked in they never turn up.

Trying to find best way to remove the pipe near a thread, or may use modern pipework further down but will have to drill holes through a flint wall.

Cheers

 

[PlumbBobBob]

Hi Steve B, would you know anyone Andover Based that could help. Cheers

no sorry i don't

 

[Clint 1979]

What you need is one of these, then you can cut the pipe anywhere and cut a new thread! Just make sure you cut it somewhere with plenty of room to work at it.

 

[Sparkgap]

Are you sure it is steel I personally have never seen steel pipework on domestic supply's ?
Could be 20 thread ?

Usual spec back in the 70s/80s due to copper shortages and price was galv steel with copper tails. Have replaced several 60+yr old black iron mains supplies in the past where the pipework was half blocked with rust & crud. The OP'd be better off ripping it all out and putting in new copper throughout. Would also get rid of the Monday morning 'Rusty Water' problem!