Gas or water pipe!!

[SUFCDAN]

870362E5-75F2-4085-A693-1EAF623967A9

• SUFCDAN
• 3 Jul 2020

Pipe

late 50’s house, solid floor, is this a gas or water pipe, how can I tell.

Thank you,

 

[denso13]

how can I tell

You'll have to trace the pipe to find out where it goes to be sure. Gas more likely than water but impossible to say by looking at it.

 

[SUFCDAN]

Ok it’s under a concrete floor so not easy, it has the letter C stamped on the elbow. I’ve tried running the cold tap, it’s silent.

 

[Nige F]

Have you cleaned it ? By the way the pipe is crooked in the fitting it's gas - classic work from 50's gas board Nothing like the Gas Safe tech. guys today

 

[lostinthelight]

Is it possible its an over spec electrical conduit pipe, my Daughter had a property with steel pipe carrying cables but they weren't galvo

 

[SUFCDAN]

Have you cleaned it ? By the way the pipe is crooked in the fitting it's gas - classic work from 50's gas board Nothing like the Gas Safe tech. guys today

Yes I cleaned it, as was going to self level/prime. So this is defiantly not water? I don’t need it as there is 22mm running direct to the boiler.

 

[denso13]

So this is defiantly not water?

Probably not, I don't think you can say definitely.

 

[SUFCDAN]

Trying to think a way of testing .

 

[JimCrow]

Ok it’s under a concrete floor so not easy, it has the letter C stamped on the elbow. I’ve tried running the cold tap, it’s silent.

It's more likely to be an old gas pipe and as Nige mentioned the pipe is cross threaded and looking at the amount of threads in the elbow it would be pi$$ing water but hold gas.

You could try this, warm it up with a gas torch then get someone to open up all the cold taps, the temperature will drop quickly if it's the cold water pipe,
then do the same with the hot taps the temperature will rise.

 

[SUFCDAN]

It's more likely to be an old gas pipe and as Nige mentioned the pipe is cross threaded and looking at the amount of threads in the elbow it would be pi$$ing water but hold gas.

You could try this, warm it up with a gas torch then get someone to open up all the cold taps, the temperature will drop quickly if it's the cold water pipe,
then do the same with the hot taps the temperature will rise.

This would be the feed in from the street (water) so why would it rise. Yes cross threaded!!! Why would it leak water not gas?

Thank you..

 

[JimCrow]

This would be the feed in from the street (water) so why would it rise. Yes cross threaded!!! Why would it leak water not gas?

Thank you..

You never mentioned it was coming from the street in your earlier post, just warm the pipe up and it will cool down quick with cold water running through it if it's a water pipe,
Far greater pressure in your incoming cold main.

 

[SUFCDAN]

Thanks, yes it was old gas to a back boiler...I cut it out. Thank you all.