Compression joints

[oldnorm]

What is the correct way to make a compression joint? There are various views on whether sealing compound should be used or not. I want to replace a defective compression joint water valve which has 3 ports. From past experience, when I dismantle it the original tight fitting olives will remain in place. Should these be removed and new ones fitted. The valve is fitted in a very confined space which makes using a saw to remove olives difficult.
Help would be appreciated.

Thank you.

 

[TomLane]

Use one of these to remove the olive

Where was leak from previously? Via the thread on the joint or around the pipe?

Do you mean the connection is a Tee piece?

 

[PlumbBobBob]

hi oldnorm welcome to the forums. yes you can use sealing compound if you wish, or a couple of wraps of ptfe tape around the olives. how old is the fitting you are replacing? the reason i ask is that the thread may be different also the dimensions of the valve may be slightly different to the new one. can you post a picture of the offending article?

 

[supper plumb]

ptfe on the olive jointing compound not used on portable water or use lock tight on the tread

 

[dancinplumba]

View attachment 14932
ptfe on the olive jointing compound not used on portable water or use lock tight on the tread

Rubbish

 

[PlumbBobBob]

i've got that olive cutter. you can get jointing compounds that you can use on potable water.

 

[Masood]

jointing compound not used on portable water

Really?

https://www.google.co.uk/#q=potable+water+jointing+compound

 

[supper plumb]

my bad sorry i st dont use it only use ptfe

 

[Phil]

There's a lot of nasty fittings going around made in a far away land where they eat fried duck heads and scorpions for snacks.
These fittings need a good smear of Water Hawk otherwise they will fail you.

 

[supper plumb]

But who is selling them phil so we can all buy some along with a tub of water hawk