
- Cut and Bevel the Pipe. Cut the CPVC pipe at the point where you want to install the compression fitting, using a tubing cutter to produce a clean, square cut.
- Insert the Pipe into the Fitting. Lubricate the end of the pipe with dishwashing liquid. ...
- Tighten Down the Fitting. Tighten the compression nut by hand. It is designed to seal without the need for a wrench. ...
- Cut the Pipe and Install the Nut. Install a brass compression valve on CPVC pipe in almost the same way you would install it on copper pipe.
- Slide the Ferrule onto the Pipe. Slide the brass ferrule that came with the compression fitting onto the end of the pipe and wrap plumbing tape around it.
- Tighten Down the Fitting. Screw the valve to the nut and tighten it by hand. PlumbingSupply.com advises not to wrap plumbing tape around the threads.
How to install a compression fitting gate valve?
- If installing a solder-type valve, place the valve onto the pipe to ensure a tight fit. ...
- If installing a push-to-connect type valve, press it squarely and evenly onto the pipe until it bottoms out. ...
- If installing a compression-style valve, thread the valve into the compression. ...
How to connect a compression fitting to CPVC?
- Every connection must have one male fitting and one female fitting in order for the two fittings to attach. ...
- The sizes of the threaded ends must match in order for the PEX fitting to twist onto the copper pipe fitting.
- You can connect pipes of different sizes as long as the threaded ends are the same size. ...
How to install compression fittings for PEX pipes?
Installing PEX Tubing
- Plan: Figure out what type of project it is, how much pipe, how many fitting you need, and anything else you may require. ...
- Collect all materials: It helps to draw out a diagram of how the pipe will run and where fittings will be necessary. ...
- Run the PEX tubing: PEX needs to be supported a minimum of every 32 inches when running horizontally. ...
Can You List the different PVC conduit fittings?
Select from conduit fittings such as adapters, bushings, couplings, elbows, straps, and connectors. Additional fittings such as reducers, offset couplings, and other various specialty fittings are also available, depending on your needs. Connect runs of the same type of conduit to create a longer straight line.

Why are compression fittings so popular?
Compression fittings are ingenious because you can use them in places where welding isn’t an option.
How to tighten a retainer nut?
To ensure that the fitting is properly seated, what I like to do is tighten it ever so slightly, then hit the back of the fitting to ensure it’s seated properly, as opposed to hitting it without tightening it, it would bounce back and not seat properly. Once that’s done, go ahead and start tightening it. Your cue for knowing when they are tight enough is when you start to hear a squeaking noise as you are tightening, this is caused by the rotational friction between all the parts inside.
How many wrenches do I need to install a retainer?
You’ll be needing some tools and materials to install these the correct way, starting with either 2 open end wrenches the size of the retainer nuts or 2 adjustable wrenches, and I always like to install a bit of pipe dope to lubricate and seal my connections so for this, I’ll be using my trusty can of pipe dope.
How to prevent solvent cement from pushed down into fitting?
Tip #8: Bevel the pipe prior to solvent welding. Using sandpaper, create a slight bevel along the pipe edge. This will prevent the solvent cement from being pushed down into the fitting.
What to wear when welding cement?
Tip #4: Wear protective clothing, safety goggles, and gloves. While solvent cement welding is much safer than other installation methods, it’s still a chemical process, so skin and eyes should be covered.
What is a fitting made of?
A standard fitting, made for metal tubing, has a metal ferrule that is smooth on the inside and a nut and no other components. A fitting made for hard plastic has an o-ring, and a stainless steel gripper ring that looks like a thin toothed washer, and a nut.
Does CVPC creep leak?
another NO, CVPC creep will guarantee a leak.
Can you use a compression fitting from Cpvc to copper?
Agree with some of the other posts; you can use a compression fitting from cpvc to copper or cpvc to cpvc, you just have to makd sure that you have the right transition fitting. Luck.
Can CPVC be cast into brass?
Go to a real plumbing supply house that deals with CPVC and they will have the CPVC fittings that are cast into brass fittings. Just glue on this CPVC adapter and the other end is male or female brass.
What is CPVC pipe?
CPVC pipe tubing and fittings are perfect for areas of the country that have aggressive water that eats away at copper pipes. This aggressive water can sometimes eat through copper pipe within eight years. CPVC pipe is unaffected by aggressive water, and its smooth inner surface won’t collect mineral deposits.
What tool do I need to cut PVC pipe?
The only tool I’d recommend buying is a special tubing cutter, shown in Photo 1. This type of cutter is designed to produce straight, burr-free cuts on CPVC and PVC tubing. You can also cut this pipe with an ordinary fine-tooth saw, but deburr the cut end with a pocketknife, file or sandpaper (See below). This step is absolutely necessary to get a good mechanical (Photo 4) or glued (Photos 5 and 6) connection.
How does a mechanical grip fitting work?
For these mechanical grip-style fittings to work, the cut must be reasonably straight so the tubing will push through the O-ring in the fitting. The fittings have a one-way gripper ring that grabs the pipe as you push it into the fitting; it’s like one of those Chinese finger puzzles you played with as a kid. Once you lubricate the end of the tubing with a drop of dishwashing liquid and push it into the fitting, it won’t come out.
How to tighten copper pipe?
Scrape away any burrs from the copper pipe and rub a drop of dishwashing liquid on each end of the copper to act as a lubricant. Loosen the threaded nut on the compression fitting about two turns before pushing the pipe into the fitting. This will allow you to tighten the nut and pull the end of the pipe tightly against the internal O-ring. When you push the pipe into the fitting, a lock ring grips the pipe. Hand tighten each nut. Do not use a wrench.
How to add shut off valve to copper pipe?
Add shutoff valves using mechanical fittings as well. These grip-style fittings work equally well on copper pipe. Follow the identical procedure, including applying dishwashing liquid to the ends of the tubing. The tubing must be inserted all the way into the fitting.
What to use to keep pipes from banging?
Use water hammer arresters to keep pipes from banging. The ones shown are specially designed for CPVC plumbing systems.
How much water does a CPVC tank hold?
CPVC is capable of carrying 180-degree water at 100 psi (water in the average home is about 125 degrees at 50 psi). Contact your local plumbing inspector to see if CPVC is permitted in your area. Note: Never use CPVC for compressed airlines. It may rupture from the pressure.

Storage and Handling
- Although FlowGuard CPVC is durable, practice proper care and storage for successful installation. 1. Tip #1: Store pipe on flat areas, free of sharp jagged rocks or debris that could puncture or damage the pipe.Additionally, never set anything heavy, sharp or rough on top of the piping. 2. Tip #2: Keep piping covered when exposed to UV light, such ...
Preparing For Installation
- While CPVC installation is fairly simple, a few safeguards will ensure a reliable system. 1. Tip #4: Wear protective clothing, safety goggles, and gloves. While solvent cement welding is much safer than other installation methods, it’s still a chemical process, so skin and eyes should be covered. 2. Tip #5: Wipe away any dirt or moisturefrom the pipe and fittings using a cleaner to ensure a st…
During Installation
- When installed properly, newly-formed joints become the strongest part of the system. To achieve this result, abide by a few standby rules. 1. Tip #9: Try to join seams in cooler areas or shade. Heat can increase how quickly solvent cement evaporates.CPVC plumbing fittingsand Pipes should only be joined while the solvent cement is wet, so stay in a cool area to make sure the sol…
Want to Learn More Tips For Installing FlowGuard® CPVC?
- Check out the full FlowGuard Pipe and Fittings Installation Guidefor additional installation instructions, including proper storage and handling, cure time recommendations and using hangers and supports. If you have any questions about FlowGuard CPVC plumbing pipe and installation, our team of piping system consultants is ready to talk.