How Hot Is Too Hot For Sch. 40 PVC? - Plumbing - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing


Thread Tools Display Modes
Old 07-05-2008, 12:40 AM   #1
Ouch!That'll leave a mark
Join Date: Jun 2008
Location: Ridgeville SC near Charleston
Posts: 49
Rewards Points: 25

How Hot is too hot for sch. 40 PVC?

I am having a problem with some 1" PVC I installed on an air conditioning system a few months back. I have 2400 feet of 1" PVC 6' under ground. I have an inlet and an outlet at the unit. On the inlet and outlet I have a Ball valve a T with a pressure Gage another T with a charging valve.(hose bib) . My problem is The T's are cracking every couple of weeks. The water is only getting in the low 120's. I have had three call backs in 2 months and it is in one or more of the T's. I'm at my WITS end. Can anyone shed some light here?


ridgevilleac is offline   Reply With Quote
Old 07-05-2008, 08:52 AM   #2
Electrical Contractor
wirenut1110's Avatar
Join Date: Apr 2008
Location: Chester, VA.
Posts: 1,054
Rewards Points: 510
Send a message via AIM to wirenut1110

The temperature rating is max 140 deg. with a derating pressure multiplier of .22. At 120 the multiplier is .40 and 130 is .31. Look on the pipe and see what the pressure rating is, use the multiplier for the temp and see if your exceeding this or close to it. You may need to change it to CPVC. Hope this helps you.


wirenut1110 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1