Nervous About Welding Drain Pipe For Water Heater T/p Valve? - Plumbing - DIY Home Improvement | DIYChatroom


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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 04-01-2012, 02:10 AM   #1
Member
 
Join Date: Dec 2006
Location: Fountain Valley, CA 92708 (orange county)
Posts: 660
Rewards Points: 504
Default

Nervous about welding drain pipe for water heater t/p valve?


Every time I install a water heater I worry about welding the drain pipe attached to the pt valve. I'm thinking the acid smoke from the heated flux will rise up inside the tube and damage the rubber gasket of the p/t valve. Is my concern groundless?

Advertisement

darsunt is offline   Reply With Quote
Old 04-01-2012, 06:08 AM   #2
A "Handy Husband"
 
rjniles's Avatar
 
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 4,222
Rewards Points: 2,354
Default

Nervous about welding drain pipe for water heater t/p valve?


I assume you mean soldering not welding. Your concerns are groundless.

Advertisement

__________________
Location:
Coastal South Carolina
rjniles is offline   Reply With Quote
Old 04-01-2012, 07:05 AM   #3
Member
 
Join Date: Mar 2010
Location: PENNSYLVANIA
Posts: 2,257
Rewards Points: 1,042
Default

Nervous about welding drain pipe for water heater t/p valve?


Just buy the pre made one's from HD or Ls. No soldering needed.
COLDIRON is offline   Reply With Quote
Old 04-02-2012, 12:10 AM   #4
Member
 
Join Date: Dec 2006
Location: Fountain Valley, CA 92708 (orange county)
Posts: 660
Rewards Points: 504
Default

Nervous about welding drain pipe for water heater t/p valve?


Yes, I mean soldering. I won't worry about it, it looks from the drain pipes I've seen that everyone does it.
Many of the drain pipes have to run a convoluted path to get from the p/t valve to the outside where they are supposed to go. I can't think of a cost effective way to run them except by soldering.
darsunt is offline   Reply With Quote
Old 04-02-2012, 12:23 AM   #5
Member
 
Join Date: Aug 2010
Posts: 1,525
Rewards Points: 1,000
Default

Nervous about welding drain pipe for water heater t/p valve?


Quote:
Originally Posted by darsunt View Post
Yes, I mean soldering. I won't worry about it, it looks from the drain pipes I've seen that everyone does it.
Many of the drain pipes have to run a convoluted path to get from the p/t valve to the outside where they are supposed to go. I can't think of a cost effective way to run them except by soldering.

Coldiron gave you a cost effective way. Buy the plastic thin walled PVC pipe from HD (~$6 for a 54" piece). Put some teflon tape, screw in and voila, done.

By the by, the pipe should never be hard piped all the way outside. Pipe down to around 1" or 2" above the rim of the floor pan. That way owner is more likely to notice if there's water coming out of the T&P.
VIPlumber is offline   Reply With Quote
Old 04-02-2012, 12:29 AM   #6
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,710
Rewards Points: 536
Default

Nervous about welding drain pipe for water heater t/p valve?


I agree it seems logical to run it outside, and I've even done it that way my self but it will not meet code to do it that way.
Anytime your soldering any valve it needs to be opened.
joecaption is offline   Reply With Quote
Old 04-03-2012, 05:27 PM   #7
Member
 
Join Date: Dec 2006
Location: Fountain Valley, CA 92708 (orange county)
Posts: 660
Rewards Points: 504
Default

Nervous about welding drain pipe for water heater t/p valve?


I think code around here (southern California) requires venting the drain of a w/h outside. Otherwise no one would go to the trouble of doing it.
darsunt is offline   Reply With Quote
Old 04-03-2012, 09:37 PM   #8
Plumber/Contractor
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: North Idaho
Posts: 7,248
Rewards Points: 2,614
Default

Nervous about welding drain pipe for water heater t/p valve?


Just goes to show how codes vary.
I cannot use PVC for a t&p line and it must pipe directly outside or to an approved drain such as FD, Sink, hub drain, etc. (not to the pan)
Pans are required in most applications and must follow the same discharge rules as the t&p.
A lot of homes here have basements and the t&p's are not piped out. In this case we can usually "grandfather" the install of the replacement heater.

Advertisement

__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is online now   Reply With Quote
Reply


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lead Drain Pipe Project Turbo98 Plumbing 33 01-30-2011 12:27 PM
AC Coil drain pipe questions fritzycat1 HVAC 14 11-12-2010 04:51 PM
Kitchen Sink Moved - new kitchen sleepysmurf Plumbing 1 08-10-2010 07:38 AM
valve retrieval in a drain houston81 Plumbing 1 07-07-2010 05:33 PM
Water heater drain mechanism (10 year old) guptaalok Plumbing 1 01-02-2009 06:40 AM




Top of Page | View New Posts