Installing plumbing fittings so they are removable on unmovable copper pipe

[Ian101]

Is it possible to install compression valves onto existing non-pullable copper pipe WHILE designing-in a means of being able to replace the whole valves should they fail?


Hello, I have existing 22mm copper pipe that needs a small section cutout to install a compression isolation valve, pressure reducing valve and solder slip coupler to rejoin. Note, with the section removed, there is no pipe movement in any direction. After installing in that way, removal of that section again becomes impossible as there will be no more room to cut back the pipe and no movement to pull the pipe out of the compression fittings should the valves need replacing. Can you think of ways/ plumbing parts to build this installation so that it is removable please?
Note, I thought of using 22mm female solder x 3/4" BSP parallel thread union couplings either side of the section however there is not enough spare pipe length left to do so.

 

[Best]

Something with flat washer or tapered flange seals would be best.
Or, can you not use a loop to give you space? That is, turn at 90 degrees?

 

[Ian101]

Unfortunately there is no room to plumb in a 90 degree bend to allow for pull out movement but good advice for someone that does.
I Googled "tapered flange seals" and it came up mostly with specialised, expensive industrial parts for oil, gas, steam, rather then standard plumbing fittings. Not sure what specific plumbing part could be used?

 

[joni os]

The loop need not be vertical it could be horizontal or any angle in between. Otherwise replace, when time comes, by cutting out valve with angle grinder, heat and remove slip coupler, clean pipe to take new slip coupler, and replace in same manner as you propose above.

 

[Tjdservices]

Instead of a solderslip coupling get a 22mm compression slip coupling. Make sure it is a slip coupling and not just a coupling. You can then when required undo the nuts. Split the olives to remove them and slide the coupling back up the pipe to give you the access again.

 

[Ray Stafford]

If you have the room, 2 x Yorkshire female loose nut unions.

If you don't have the room, then make the room.

 

[lame plumber]

get an old plumber in to show you how

 

[Dotty]

get an old plumber in to show you how

We used to have an Old Plumber on this forum. We got shot of him because he was an irritating turd........

 

[lucas121]

Pegler Yorkshire YP11 union coupling 22mm | Plumb Center

Very expensive for what it is though.

 

[Dotty]

What is it you're trying to do, exactly?

 

[snowhead]

If there is enough room to work on the pipe then there must be enough room to go up or forward or sideways.
If there isn't then as Ray said you need to make room.
What's either side, if horizontal or above or below if vertical?

Elbow up on upstream pipe (street elbow if short of height)
Iso valve onto elbow

Elbow on downstream pipe
Regulator on elbow

2 elbows and a short section of pipe to join them.

All of this pointing forward, up down or wherever the space is.

 

[WaterTight]

A picture would be extremely useful.

 

[snowhead]

A picture would be extremely useful.

Or 1000 words would be as good, apparently.