C P V C Piping

[pudgybear]

I am familiar with P V C pipe but have never worked with C P V C, My question is PVC is for cold water and CPVC is for hot water, Right ?
Next, what color cleaner & glue, any other tips about working with CPVC would be helpful !!! thanks Bob

 

[Stuart in MN]

What Are The Differences Between CPVC And PVC?

The main difference between CPVC and PVC is the range of temperatures each is capable of withstanding. CPVC can handle temperatures up to 200° Fahrenheit, while PVC peaks at 140° Fahrenheit. Above those temperatures, both CPVC and PVC will begin to soften, increasing the risk of joints and pipes failing.

The primers, solvent cements, and bonding agents are different for PVC and CPVC due to the differences in their chemical composition. For example, CPVC solvent cements must meet ASTM F493 specifications, and PVC solvent cements must meet ASTM D2564 specifications. Because of this, CPVC and PVC pipes and fittings, along with their solvents and bonding agents, should not be used interchangeably. In addition to meeting ASTM specifications, there are different solvent cements required based on the pipe’s size and intended application, so check the product containers to be sure you’re using the correct agent for the correct application.

PVC comes in nominal pipe sizes only, while CPVC is available in both nominal pipe sizes and copper tube sizes. CPVC has greater flexibility than PVC, and requires support at three foot intervals to maintain its position.

More information is at https://pvcpipesupplies.com/cpvc-vs-pvc

 

[K'ledgeBldr]

Maybe this will help you-



https://www.commercial-industrial-supply.com/resource-center/gluing-pvc-and-cpvc-together/

 

[HoosierBuddy]

25 years ago when I was replacing a lot of galvanized water lines in my house, this was correct. PVC was used for cold water and CPVC for hot.

If I was doing that work now, I think I'd use PEX.

Phil

 

[tonyciambrone]

CPVC is just fine for potable/ cold water. Good for Hot too but I wouldn't run it all the way into a tankless unit personally.

I like to cut it with a hacksaw or bandsaw personally, shears seem like they work harden the edge and don't give me a straight cut all the way through.

 

[fourjeepin]

Another vote for pex. My house had polybutylene and cpvc supply lines. I debated for a long time whether to go pex or cpvc to replace the old poly and love working with pex.

 

[BigGarage]

I am familiar with P V C pipe but have never worked with C P V C, My question is PVC is for cold water and CPVC is for hot water, Right ?
Next, what color cleaner & glue, any other tips about working with CPVC would be helpful !!! thanks Bob

I used cpvc to completely redo the water lines (hot & cold) in my last home. In my current home I have redone almost all of the water lines that were galvanized and used cpvc. I used pvc for waste/drain/vent lines. I have no potable water going through pvc.

I used tubing cutters to cut it to size. I sand the outer surface of every piece I've ever installed and sand the inside of fittings before priming. I clean the sanded area very well before going further, usually wiping it with a paper towel.

I have never had a problem in either home with the plumbing work I have done. Definitely buy a book to help you through the process.

Dennis

 

[iamrfixit]

Pex is a FAR better product. I've had plenty of experience with CPVC, and it's all been bad. It gets brittle over time, especially on the hot line and the fittings can just split.

My nephew had about $40K in damage when a fitting split under his bathroom sink. He was out of town for the weekend and water ran for about two days. Ruined all flooring on the main floor, went through the furnace and cracked the heat exchanger. Water poured over the breaker panel onto the washer dryer ruining all of them, plus all the floors in the finished basement. Wife's brother had a fitting behind the washer break off and flood their basement. My current house had about 20' of cpvc a previous owner installed, getting rid of it was one of the first things I did. Amazing how easily the pipe could be snapped off.

The tools to work with PEX are not expensive anymore. If you use the stainless clinch clamps, you'll only need one tool for all sizes.

 

[CJ7VFR]

We learned it as CPVC is for potable water supply lines (hot and cold) and PVC is for drain lines.

Jim

 

[boley]

Unless you are a professional with specific CPVC training, I would stay away from the stuff. I work in the construction risk control world, and contractors (usually fire sprinkler) who use CPVC get a whole extra level of scrutiny because the stuff can fail in multiple ways. Something as simple as using the wrong glue, or touching CPVC with spray foam can make it crack down the road.

Here is some info. From an obviously biased source, but generally accurate. https://www.plasticpipefailure.com/cpvc-problems

 

[NUTTSGT]

I, myself, like a few others have mentioned would start making the switch to PEX.

Once you start, you'll wonder why you didn't do it sooner.

 

[red61cj5]

Don't forget that cpvc is not appropriate for high pressure air, and we all know pvc is.

 

[nadogail]

CPVC, IMHO, is very appropriate for hot water and many heated chemicals.

 

[Technologyteacher]

Don't forget that cpvc is not appropriate for high pressure air, and we all know pvc is.

I thought the C in cpvc stood for Compressed Air