Compression Jointing

Below is the basic process for ensuring that a good compression joint is achieved. The joints are relatively easy to fit and are very reliable and also require little preparation prior to fitting. They are used regularly by the professional plumbers such as NW4 Plumbers.


NOTE:

It is worth pointing out that the joint described below require no other material for the connection to take place. It is known in the trade as a dry jointing method. A trick that is sometimes used by plumbers especially if the compression ring is old is to wrap a piece of PTFE tape over the compression ring or maybe apply a small blob of a something called “jointing paste” on the ring in to make up for any blemishes. The jointing paste is not applied onto the threads of the fitting as there main purpose is to pull the joint together but they do not make the seal.

To complete a joint:

Press the nut onto the pipework and then, push on the brass compression ring. Push the end of the pipe fully into the fitting and make sure that it reaches the stop.

Run the compression ring along the pipe to the mouth of the fitting. Screw the nut clockwise onto the thread of the fitting.

The compression ring now has to be drawn into the fitting itself, and that is achieved by not over tightening the compression nut, distorting the ring when is inside. Any such distortion could result in a high risk of leaks.

The joint only needs to be tightened to make sure that the connection is a firm one. This can be tightened more if required when the water supply is restored. If it is over tightened, then any further tightening would not cure any leaking at the joint. An NW4 Plumber can use compression joints for many plumbing jobs.

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