Installing pex water pipe

Installing pex water pipe for fresh water systems is so much easier than using copper pipes. Plastic tubing is easy to cut , easy to run and easy to crimp with the fixture connection. It's also a lot cheaper than copper pipe.




Pex is color coded so we can remember which line is hot and which is cold. The plastic tubing is very strong and it even allows for expansion in case the tubing gets frozen, unlike copper pipes.

Every hot and cold line either have a screw-on connection or a crimped connection to the manifold. The tubing runs under the floor or through the walls to each fixture. At the fixture, the tubing will have a screw-on connector.

The layout for Pex tubing is quite simple. There's a water line for every fixture and many manifolds have a shut-off valve on each fixture outlet. This is very convenient when you need to replace a fixture like a sink faucet because you don't need to shut the water main off, just the valve to the fixture.



So the pex tubing connects to the manifold with a female end connector. There will be another female end connector on the other end of the water line that connects to the fixture or appliance.




All connectors will be inserted into the pex tubing and secured with crimp rings. The crimping tool flares out the sides of the crimp rings forcing the plastic tubing to squeeze around the fitting. This gives it a good seal.

If you're doing a small project the compression connectors might be a good idea. You don't need crimp rings and a crimping tool. These just screw on and make a good seal. The big setback to compression fittings is that they are expensive.

If you're doing several water lines, you'd be much further ahead by buying crimp rings and renting the crimping tool.


The pex connections fasten to fixtures and appliances and are very durable. They will last for decades.


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