[Greenbuilding] [BULK] Re: [BULK] Sprinklers-and PEX

[John Salmen]

Temp ratings on pipe are a combination of temperature and pressure. Standard
thinwall is around 120d @ 100 psi though most pipe is rated higher. Pressure
relief and vented collectors are typically used in systems. A system
shutdown will more likely meltdown collector components before damaging
pipe.


JOHN SALMEN ENVIRONMENTAL DESIGN
4465 UPHILL RD,. DUNCAN, B.C.  CANADA, V9L 6M7
PH 250 748 7672 FAX 250 748 7612 CELL 250 246 8541
terrain at shaw.ca


-----Original Message-----
From: greenbuilding-bounces at listserv.repp.org
[mailto:greenbuilding-bounces at listserv.repp.org] On Behalf Of Lawrence Lile
Sent: September 14, 2007 7:15 AM
To: Sacie Lambertson; Greenbuilding at listserv.repp.org
Subject: Re: [Greenbuilding] [BULK] Re: [BULK] Sprinklers-and PEX


Sacie sez:

>I learned to my distress PEX can not be used in solar water systems 
because it can't take the heat, distressed because I embedded it in 
my walls and to the roof in preparation for just this.  But 
otherwise, what is bad about it?   Sacie 

Uh oh, I did the same rough-in.  If PEX will take 120F for domestic hot
water, why not solar?  Are you expecting more than 120F in a solar hot
water heater?  

A newer vacuum collector might get so hot, the older, less insulated
collectors may not.  Any experiences?  

--Lawrence


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