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Plumbing question [message #232717]

Mon, 09 December 2013 13:46

Otterwan

Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...

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Senior Member

I thought my coach had PEX as OEM plumbing, but now I'm not sure. It has plastic tubing with some sort of conical compression fitting that appears to be glued onto the tubing. As I'm doing some repairs/upgrades I'm curious as to:

* What is the original system called
* Is it compatible with PEX fittings

1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."

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Re: [GMCnet] Plumbing question [message #232719 is a reply to message #232717]

Mon, 09 December 2013 13:58

scott cowden

Messages: 170
Registered: February 2004

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Senior Member

What Color is the tubing?

Sent from my iPhone

On 2013-12-09, at 2:46 PM, "David Orders" <dao@oarsllc.com> wrote:

>
>
> I thought my coach had PEX as OEM plumbing, but now I'm not sure. It has plastic tubing with some sort of conical compression fitting that appears to be glued onto the tubing. As I'm doing some repairs/upgrades I'm curious as to:
>
> * What is the original system called
> * Is it compatible with PEX fittings
>
> --
> 1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood WA - “What did you learn today? Did you learn how to believe, or did you learn how to think?"
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Re: [GMCnet] Plumbing question [message #232721 is a reply to message #232719]

Mon, 09 December 2013 14:05

Otterwan

Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...

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Senior Member

scott cowden wrote on Mon, 09 December 2013 11:58

What Color is the tubing?

Black in the 1976 Royale, grey in the 1978 Palm beach, but it appears to be the same stuff.

1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."

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Re: Plumbing question [message #232726 is a reply to message #232717]

Mon, 09 December 2013 14:58

Richard RV

Messages: 631
Registered: July 2012
Location: Full-timer for 12 years, ...

Karma: -17

Senior Member

The original plumbing was copper, then they switched to polybutylene, which is usually grey and as you described.

Sharkbite type fittings will work, but I don't have enough time/experience with them in an RV application to recommend push-on fittings. I did replace my kitchen faucet and use Watts plastic push-on fittings to hook up to the polybutylene original lines.

Richard

'77 Birchaven TZE...777; '76 Palm Beach under construction; ‘76 Edgemont waiting its turn

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Re: [GMCnet] Plumbing question [message #232748 is a reply to message #232717]

Mon, 09 December 2013 16:39

emerystora

Messages: 4442
Registered: January 2004

Karma: 13

Senior Member

Your plumbing lines are polybutylene. This was once used in houses but is no longer accepted by the US or Canadian building codes and have been the subject of several class action lawsuits in both countries. Chlorine in the water can cause deterioration of the piping and its associated acetal fittings.

It is not PEX. You used to be able to purchase Qest compression fittings in Home Depot to use with the polybutylene. But I haven't seen them lately. You can probably use PEX fittings as the outside diameter should be the same.

Emery Stora

On Dec 9, 2013, at 12:46 PM, David Orders <dao@oarsllc.com> wrote:

>
>
> I thought my coach had PEX as OEM plumbing, but now I'm not sure. It has plastic tubing with some sort of conical compression fitting that appears to be glued onto the tubing. As I'm doing some repairs/upgrades I'm curious as to:
>
> * What is the original system called
> * Is it compatible with PEX fittings
>
> --
> 1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood WA - “What did you learn today? Did you learn how to believe, or did you learn how to think?"
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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Re: Plumbing question [message #232756 is a reply to message #232717]

Mon, 09 December 2013 17:25

phil

Messages: 24
Registered: July 2012
Location: Stevensville, Montana

Karma: 1

Junior Member

Richard--As everyone has told you, you have polybutylene piping. If you want to use pex in making repairs/mods, Watts makes a transition coupler (LFP-505) that will connect the two together. You should be able to find them at a good hardware store. Don't use regular pex fittings for the polybutylene!

Thanks, Phil '76 Eleganza II Stevensville, Mt. Montana-where Californians move to.

[Updated on: Mon, 09 December 2013 17:26]

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Re: Plumbing question [message #232808 is a reply to message #232717]

Tue, 10 December 2013 10:13

Chris Tyler

Messages: 458
Registered: September 2013
Location: Odessa FL

Karma: 7

Senior Member

If you need to make a connection in an inaccessible area you can Mc Gyver it by cutting the Quest line, using a brass barb fitting to the other line, heating the line until softened, pushing it on and tighten 2 hose clamps while still soft.

76 Glenbrook

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