What is a Slip Coupler?

[jim]

From Screwfix catalog:

eg item code 56343 (page 461) which is a Cu solder ring15mm slip coupler.

What is a 'slip coupler' as opposed to just an ordinary straight join?

TIA for explanation.

[The Natural Philosopher]

one that has no central ridge so it can be slipped entirely onto a pipe when inserting a new section of pipe into a run.

[tinnews]

I wondered this some while ago.

It's one that has no 'shoulder' inside so it can be slid along a pipe to somewhere that needs a repair. If you used a normal coupler to mend the hole you'd have to cut the the pipe.

... or even if you cut the pipe the slip coupler can be slid right onto one side of the cut and then, when you have aligned the two halves, slid over the join.

At least this is my understanding of what it's for.

[Roger Mills]

That's about right. It enables two pipes to be joined end-to-end without needing to move one of the pipes axially to fit the coupling.

[Rick Hughes]

Think of them as repair sleeves .... If you use a normal coupler you have to be able to move one of the pipes away enough to allow you to get couple in place, with repair coupler, you lift one end of cut pipe ... slide couple right on (past pipe end) line pipes back up and slide coupler back.

[Martin Bonner]

You missed the vital first step. - Mark one of the pipes to indicate where the end of the coupler should go.

and the final steps becomes - slide coupler back so that the end lines up with the mark.

[Dave Liquorice]

Or put a mark the same distance back from the end of each pipe, just a bit further in than half the slip coupler. Then align the coupler midway between them. Depending on how big the gap between the pipe ends is, this may be a better way of getting the alignment correct. At least the amount of pipe in each end should be equal. With the single mark at proper depth, the other pipe will only be in the proper depth minus all the gap.

[David]

Is it a bit like how this video shows?

Watch from 02:17