PEX crimp equipment is a lot more affordable than the expansion kits. However, despite the pricing and form shortcomings, most plumbers prefer to work with expansion because installation is more efficient. There are fewer leaks, and it also seems to be more durable against extreme colds and frozen pipes, etc.
Why do you expand PEX?
Using the expansion tool, you enlarge the pipe and sleeve in order slide in the fitting. Because PEX A is expandable, the material’s memory will ensure that it will shrink back to its normal size, tightening snugly around the fitting.
Should you upsize PEX?
There is a rule of thumb among contractors that when swapping out copper pipe for PEX the safest thing to do is upsize the PEX tubing. The thinking behind it is that replacing ¾” copper with 1″ PEX is a no-brainer way to ensure adequate pressure and performance.
Are PEX expansion fittings reliable?
Its resistance to freeze damage as well as corrosion, pitting and scaling makes PEX the most durable piping product on the market today. Its flexibility minimizes connections by up to half in certain applications, making it one of the fastest piping installation methods available.
Which PEX connection method is best?
Crimp”
The most common connection method used in PEX installation is the “Crimp” method. This process involves sliding a ribbed fitting into the PEX tube and crimping a seal ring around the connection point. These rings are typically made of copper, but may be found in plastic as well as brass.
Which is better for PEX crimp or cinch?
When it comes to which method is better between crimping and cinching, it all comes down to personal preference and workload. If you are looking for a fast and more secure connection that will stand the test of time, crimp tools are your better option.
How many times do you expand PEX?
Once the ring bottoms out, keep the trigger depressed. Count an additional 3-6 expansions. Doing this ensures you have enough time to connect your fitting without it shrinking back to size too quickly. You also need to hold the PEX tubing and fitting together for a second.
Does reducing pipe size increase water pressure?
In water flowing pipeline, pipe size and water pressure are dependent on each other. Because if the diameter of a pipe decreased, then the pressure in the pipeline will increase. As per Bernoulli’s theorem, pressure can be reduced when the area of conveyance is reduced.
How do you use PEX expansion fittings?
Quote from the video:
Quote from Youtube video: It is important to make sure the expander. Head rotates after each expansion to prevent ridges on the inside of the tubing. Once the tubing is expanded insert the fitting until it hits the shoulder.
How can I make my PEX pipe more flexible?
PEX tubing is also very easy to bend. To help PEX tubing make turns, you have a choice of three methods: 90-degree elbows, bend supports, and clamps.
Bend PEX With a Bend Support
- Warm the PEX Tube. …
- Push Into One Side of the Bend Support. …
- Bend the PEX Tubing. …
- Push Into Other Side of the Bend Support.
Do PEX crimp fittings restrict flow?
The reality is that even PEX expansion fittings, which are sometimes referred to as “full-flow,” restrict flow rates.
Why do PEX fittings fail?
Piping fails when the pipes are exposed to chlorine that is within the water, exposure to direct sunlight before its installation. Furthermore PEX pipe is vulnerable when it comes in contact with such solutions as petroleum products and oxygen. It can leach toxic chemicals from pipe material also.
Can you crimp PEX too tight?
PEX crimpers must provide a not too tight and not too loose crimp. The crimper must be durable and reliable if you want perfect crimps. Occasional drops or mishandling will take place.
Why are PEX crimp rings black?
The black coating is not a paint but a surface treatment which does not add to the dimensions of the ring. Brass Insert Fittings and rings are manufactured and certified to the requirements of ASTM F1807 to insure compatibility with all SDR9 PEX tubing and fitting components from numerous manufacturers.
Which PEX is expandable?
PEX A
PEX A is: More flexible, making it expandable and suited for fastening by cold expansion. Resistant to kinking that will make a pipe unusable.
Should I use brass or plastic PEX fittings?
Brass its typically the best choice when the application demands a stronger fitting. In addition, plastic PEX fittings have a thicker wall requirement under ASTM2159 Standard, resulting in a reduced ID which restricts flow, while brass PEX fittings are manufactured to ASTM F1807 allowing for a larger flow passage.
Which is better PEX crimp or clamp?
Quote from the video:
Quote from Youtube video: Although there are a few pros. And cons to keep in mind for each stainless steel clamp rings resist corrosion more effectively than crimp rings.
Do I have to use a manifold with PEX?
Do I Have to Use Manifolds with PEX? No. You can install PEX fittings supply just like you would other pipe, with main lines and branches to each fixture. But you lose a lot of the benefits of PEX with this system since it requires so many fittings.
Are plastic PEX fittings OK for hot water?
Metal fittings are required, however, where the fitting is exposed to UV light. Also, no plastic pipe or fittings can be used within 18 in. of water heating devices. Check your local building code in case there are other requirements where you live.
Why are my PEX fittings corroding?
When water flows through your PEX pipes, the zinc in the fittings can seep out of the fittings, causing a white residue to build up inside the pipe, constricting water flow. It works the same way as plaque that constricts blood flow in your arteries.
How long do PEX fittings last?
Generally, PEX pipes last for 25 to 40 years before they need to be replaced. By comparison, copper pipes last for around 50 to 70 years. PVC pipes also last 50 to 80 years. CPVC pipes last 50 to 75 years.
