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#61997 - 02/07/06 08:17 PM PEX vs. Hi-Hats  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA
I have been in situations where a run of plastic plumbing (PEX Tubing) has been very close (1-2") to where I'd like to install a recessed light. I'm not sure how close they can be, or what would happen if they eventually came in contact.

A PEX information site says that it is good for up tp 200 deg. for heating applications, 180 deg. for plumbing, but maximum recommended of 140 deg. I'm not sure how hot the outside surface of a Hi-Hat gets.

Any thougths, or experiences would be appreciated.

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#61998 - 02/07/06 09:08 PM Re: PEX vs. Hi-Hats  
macmikeman  Offline
Joined: Jul 2002
Posts: 717
Honolulu, Hawaii
Well, if it gets too hot and burns the pex thru at least there will be enough water around to cool things off somewhat.

#61999 - 02/07/06 11:30 PM Re: PEX vs. Hi-Hats  
Celtic  Offline
Joined: Feb 2005
Posts: 361
I just had an inspector "suggest" I keep my HH's 3-6" away from the pex.

A more prudent solution would be for the plumbers to check the prints and keep their pex away from my HH's.

~~ CELTIC ~~
...-= NJ =-...

#62000 - 02/08/06 07:21 AM Re: PEX vs. Hi-Hats  
Dnkldorf  Offline
Joined: Dec 2004
Posts: 1,064
nowhere usa
Celtic, I once built 40 identical homes, identical I say..

In every home, the framing was different, the plumbing routes were different, the Hvac returns and ducts were different....

One would think after 0ne or two, people would have their stuff together, and they would all be the same....wishful thinking on my part....

I don't know, cause I got out of that line of work, but pre-manufactured homes seem the only way to avoid these dilemas. I am thinking pre-manufactured meaning, the ones that have all the walls built with cutouts, and then get assembled on site, but I am sure they have their problems too...


#62001 - 02/08/06 10:23 PM Re: PEX vs. Hi-Hats  
Clydesdale  Offline
Joined: Nov 2004
Posts: 138
Yeah..I had the same problem with that. I talked to the plummer and he took care of me.

#62002 - 02/09/06 03:43 AM Re: PEX vs. Hi-Hats  
Larry Fine  Offline
Joined: Feb 2005
Posts: 693
Richmond, VA
As long as the pipe contains water, it will never exceed 212F.

I can't imagine a fixture getting near that with the thermal cutout.

Larry Fine
Fine Electric Co.

#62003 - 02/09/06 01:40 PM Re: PEX vs. Hi-Hats  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,142
The operative term here is "contain". If it gets to 212f it won't be containing much of anything anymore. The weakest place in that pipe system will rupture. Hopefully it will be the popoff valve in the water heater.

Greg Fretwell

#62004 - 02/09/06 06:32 PM Re: PEX vs. Hi-Hats  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA
Thanks guys.
I kept the light about 4" horizontally.
I don't think there's much of a problem, but I looked at the print on the tubing. It said 180 deg. F @ 100 PSI.

#62005 - 02/14/06 07:33 PM Re: PEX vs. Hi-Hats  
Electricmanscott  Offline
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
What about getting the amnufacturers name and sending them an email. Sometimes they actualy answer questions. Sometimes.

#62006 - 02/15/06 08:07 PM Re: PEX vs. Hi-Hats  
Larry Fine  Offline
Joined: Feb 2005
Posts: 693
Richmond, VA
"They mostly come out at night . . . mostly." ~ Newt in Aliens

Larry Fine
Fine Electric Co.

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