Would like to use PVC

DoubleD · Mar 19, 2008

I'm installing a basement bathroom. The current water lines are 3/4"(I think for cold) and 1/2" for hot. The existing lines are copper. I would like to tap into the copper and convert to CPVC. What size should I go with for each? I'm putting in sink, toilet, and shower.

Thanks

Dennis

hj · Mar 19, 2008

pipes

You are not going to gain much by increasing the sizes unless there are long distances involved.

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DoubleD · Mar 19, 2008

The distance is not long. Can I use 1/2" CPVC for both? Will I lose anything going from 3/4" to 1/2" on the cold?

Mikey · Mar 19, 2008

DoubleD said:
The distance is not long. Can I use 1/2" CPVC for both? Will I lose anything going from 3/4" to 1/2" on the cold?

If the distance isn't too great, you should consider staying with copper. The transition fittings (CPVC<->Copper) are pretty pricey. Either way, 1/2" should be fine.

Gary Swart · Mar 19, 2008

The inside diameter of CPVC is smaller than the same size copper pipe. You would be wise to stay with copper.

Prashster · Mar 19, 2008

I converted to cpvc for a tap off my mains to a bar sink. It worked pretty well. I found that Price(transition coupler + cpvc pipes) < Price(copper pipe).

I also considered PEX because of ease of installation. However, for a small job, the price of the crimper blows the calculation.

DoubleD · Mar 19, 2008

Thank you.

Gary Swart · Mar 19, 2008

BTW, your thread is titled. "Would like to Use PVC". In the body you say CPVC. I trust you know the difference and that PVC is not allowed for inside water supply lines. CPVC is of course, but I'd still stay with copper.

DoubleD · Mar 19, 2008

I know the difference. However, I thought that CPVC is a "kind" of PVC. Hence the title.
I am using all CPVC. But can you use PVC for cold water?

Thanks

Gary Swart · Mar 19, 2008

No PVC for water supply inside the house. Yes, CPVC is a kind of PVC, but it has different chemical properties and requires different solvent. (glue)

DoubleD · Mar 19, 2008

Thanks for the info.
Where can PVC be used?

Gary Swart · Mar 19, 2008

Inside it can be use for drain lines. Outside it can be use for the main supply line to the house and for sprinklers.

Wrex · Mar 20, 2008

I agree with the other opinions here if your run isn't that long stick with copper.

1/2" for the fixtures described will be fine.

Would like to use PVC

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