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-   -   Connecting CPVC to toilet or sink (http://www.diychatroom.com/f7/connecting-cpvc-toilet-sink-161659/)

digitalplumber 10-30-2012 06:44 PM

Connecting CPVC to toilet or sink
 
does it matter?
http://i1259.photobucket.com/albums/...lshooter/1.jpg

http://i1259.photobucket.com/albums/...lshooter/2.jpg


What does the second do that makes it better, if it is?

TheEplumber 10-30-2012 07:40 PM

Choose the first one.
Do not conceal a fitting that relies on a rubber washer to seal it. The gasket will fail just like they do in a garden hose

md2lgyk 10-31-2012 09:17 AM

Quote:

Originally Posted by TheEplumber (Post 1041308)
Choose the first one.
Do not conceal a fitting that relies on a rubber washer to seal it. The gasket will fail just like they do in a garden hose

Why would the gasket fail? A garden hose gasket fails because hoses are connected and disconnected multiple times. A water line to a toilet never gets disconnected. I've never had one fail in 40 years of owning houses.

TheEplumber 10-31-2012 10:10 AM

Quote:

Originally Posted by md2lgyk (Post 1041617)
Why would the gasket fail? A garden hose gasket fails because hoses are connected and disconnected multiple times. A water line to a toilet never gets disconnected. I've never had one fail in 40 years of owning houses.

IMO-There is no reason to use a gasket connection when you can simply glue CPVC. To take it a step furthur, I wouldn't even use CPVC :)
I have seen multiple dialectic unions and flex connectors on water heaters that leak at the gasket- they never get disconnected either. Why trust a strip of rubber over a solvent weld joint?

md2lgyk 10-31-2012 02:14 PM

I have never seen a direct solvent-welded connection to a toilet. And every toilet tank I've ever seen has had a threaded male water inlet. So there's going to be at least one gasket no matter what.

digitalplumber 10-31-2012 02:46 PM

Quote:

Originally Posted by TheEplumber

IMO-There is no reason to use a gasket connection when you can simply glue CPVC. To take it a step furthur, I wouldn't even use CPVC :)
I have seen multiple dialectic unions and flex connectors on water heaters that leak at the gasket- they never get disconnected either. Why trust a strip of rubber over a solvent weld joint?

Why not?

TheEplumber 10-31-2012 03:06 PM

Quote:

Originally Posted by md2lgyk (Post 1041778)
I have never seen a direct solvent-welded connection to a toilet. And every toilet tank I've ever seen has had a threaded male water inlet. So there's going to be at least one gasket no matter what.

I assumed the OP wanted to conceal the fitting inside a wall for a sink or toilet stub out- again, I would not. To take it a step further- I doubt my inspector would let me

Quote:

Originally Posted by digitalplumber (Post 1041796)
Why not?

why not what, use CPVC? Nobody in my area uses it. Plumbers here tried it and we had too many problems with joints failing for various reasons so we moved on to other pipe products- other choices we prefer are pex and copper.

digitalplumber 10-31-2012 03:16 PM

Quote:

Originally Posted by TheEplumber

I assumed the OP wanted to conceal the fitting inside a wall for a sink or toilet stub out- again, I would not. To take it a step further- I doubt my inspector would let me

why not what, use CPVC? Nobody in my area uses it. Plumbers here tried it and we had too many problems with joints failing for various reasons so we moved on to other pipe products- other choices we prefer are pex and copper.

Thanks, but from what I have read, the reason you sight to not use it, also occurs in pex and copper, right? I'm in Houston Texas.

TheEplumber 10-31-2012 03:29 PM

Quote:

Originally Posted by digitalplumber (Post 1041814)
Thanks, but from what I have read, the reason you sight to not use it, also occurs in pex and copper, right? I'm in Houston Texas.

I haven't used CPVC in several years and I know the product has improved. But we had problems with fittings failing well into our warranty period- happened more then once and to more then one contractor. So you can see why I'm gun shy. It could have been installer error or product issues. If your area uses it a lot then I'd suggest you stay with it.

digitalplumber 10-31-2012 03:54 PM

Quote:

Originally Posted by TheEplumber

I haven't used CPVC in several years and I know the product has improved. But we had problems with fittings failing well into our warranty period- happened more then once and to more then one contractor. So you can see why I'm gun shy. It could have been installer error or product issues. If your area uses it a lot then I'd suggest you stay with it.

So if I understand you correctly, your decision not to use cpvc is solely based on the joints, correct?

TheEplumber 10-31-2012 04:05 PM

Quote:

Originally Posted by digitalplumber (Post 1041828)
So if I understand you correctly, your decision not to use cpvc is solely based on the joints, correct?

I just found this file. I skimmed over it and I think it addresses my concerns with CPVC. Bear in mind that I was first exposed to the product 10 yrs-or so ago. I'm sure it has improved or it wouldn't be in production today. However, whats the saying? -- once bitten, twice shy......:)

http://www.cpcplastics.com/pvc_plast...rt_package.pdf

mikey48 10-31-2012 04:24 PM

Used CPVC when I added a new bathroom, 15 years ago. Not one problem so far.


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