Water Heater Pressure Relief Question - Plumbing - DIY Home Improvement | DIYChatroom

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


Thread Tools Display Modes
Old 03-25-2013, 09:33 PM   #1
Join Date: Feb 2013
Posts: 26
Rewards Points: 25

Water heater pressure relief question

I have a friend who just purchased a house. I think its from the 50s and the outside construction is brick. I can't remember if the inside is brick or not.

The "newish" water heater is located in a closet in the center of the house. There is no pressure relief pipe on the water heater at all right now. Just a pressure relief valve. There is no drain inthe floor. I would like to help install a pipe to direct the water if the valve ever opens.

Can it be directed into a bucket on the floor?

If not, I will have to pipe it into the attic and then over a room and then down the outside of the house. I'm hoping to avoid that.

What do you think?


chris_b is offline   Reply With Quote
Old 03-25-2013, 09:52 PM   #2
Join Date: Feb 2010
Location: Michigan
Posts: 451
Rewards Points: 352

Can it be directed into a bucket on the floor? No.


plumberinlaw is offline   Reply With Quote
Old 03-25-2013, 10:14 PM   #3
Join Date: Feb 2013
Posts: 26
Rewards Points: 25

Thank you. I read elsewhere the pipe has to be in a downward direction so no water hgets trapped in the pipe to mold too. Doesn't leave many options.
chris_b is offline   Reply With Quote
Old 03-25-2013, 10:17 PM   #4
TheEplumber's Avatar
Join Date: Jul 2010
Location: North Idaho
Posts: 9,497
Rewards Points: 86

Can you pipe into the floor joist and then to the outside wall?
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
Old 03-26-2013, 05:29 AM   #5
Join Date: Nov 2011
Location: Hartfield VA
Posts: 33,365
Rewards Points: 11,856

The heater should be sitting in a pan and the drain for the pan runs outside, the drain for the relief valve sits in the pan a few inches off of the bottom.
Reason being is it starts leaking or pops off someone will see it leaking.
joecaption is online now   Reply With Quote
Old 03-26-2013, 07:41 AM   #6
Master Plumber
Javiles's Avatar
Join Date: Dec 2011
Location: Miami Florida
Posts: 1,593
Rewards Points: 974

Downward run only 6 inches above the floor, if you run it to the exterior of the home you'll need a visible air gap on the line.

Experience is Knowing what to do next, Skill is knowing how to do it

Javiles is offline   Reply With Quote
Old 03-26-2013, 09:32 AM   #7
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 7,832
Rewards Points: 3,770

A water heater must have a properly installed temperature/pressure relief valve. Otherwise a malfunction with the heating components can cause it to explode. Install the relief valve now with outlet pipe pointed down and ending less than 6 inches from the floor. You can plan on what else to install later.

A water heater should have an expansion tank. Some inspectors insist that an expansion tank be installed above the heater but the pressure tank of a water system with a well pump will serve the purpose when there are no closed valves between it and the water heater.
States can help recovery from hurricanes and tornadoes by not requiring due digence or prompt and timely correction of substandard conditions, and by providing continued liability insurance where companies drop homeowners.
AllanJ is online now   Reply With Quote
Old 03-26-2013, 06:11 PM   #8
Join Date: Mar 2013
Location: Ohio
Posts: 4,452
Rewards Points: 1,448

It is a sever safety issue that a person can see if a relief valve has tripped. That is why you need an air gap if you run it out of the room. If it goes off and you ignore it you could end up killing the house and what lives there.


Ghostmaker 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
pressure relief valve is leaking on boiler wlmpdiycr HVAC 65 10-26-2011 05:00 PM
Pressure drop across water heater, low hot water flow HVAC_NW Plumbing 2 01-17-2011 10:43 PM
Help! Water Heater Pressure Relief Valve leaking mmoore58 Plumbing 4 01-02-2011 12:30 PM
low hot water pressure angus242 Plumbing 10 01-08-2009 11:41 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1