(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 8 of 8

Thread: Water Heater Question

Hybrid View

  1. #1
    DIY Junior Member dmkraft's Avatar
    Join Date
    Aug 2009
    Location
    Wisconsin
    Posts
    8

    Question Water Heater Question

    Yesterday my 8 year old 50 gal AO Smith gas water heater began leaking out of the top of the unit around the exhaust flue. My home is also 8 years old, it is a ranch with the heater in the basement. I was surprised at the way it was plumbed. Instead of a drain valve sticking out of the side it instead has a 3/4" copper pipe connected to a tee, one side of the tee goes down and a shutoff valve is mounted. The other side of the tee reduces to 1/2" has a shutoff and goes up to the ceiling and follows the same route as all of the supply lines. They all go thru a finished portion of the basement so I have no way of knowing where this particular line ends. I replaced the water heater and left this line unconnected. I have hot water at all fixtures. My question is what is this line for? Why would the plumber run a line from the drain valve? Thanks in advance for your help.

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,605

    Default

    It was the pipe for your "instant hot water" feature. Without that you have to run the water at the faucets longer before the hot water arrives. If it did not have a pump it was probably NOT working properly, if at all, and if it did not have a check valve, then you are better off without the connection.

  3. #3
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,675

    Default

    Quote Originally Posted by dmkraft View Post
    Why would the plumber run a line from the drain valve?
    Actually, the line ran to the tank as hj said, for a recirc return.

  4. #4
    DIY Junior Member dmkraft's Avatar
    Join Date
    Aug 2009
    Location
    Wisconsin
    Posts
    8

    Default

    So where is the line that is going to the drain valve coming from? It has a shutoff on it, should I cap it? If it isn't doing me any good I would rather not connect it to the new heater. If I connected to the new heater via the drain valve would it have any benefit?

  5. #5
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,675

    Default

    The line would most likely come from the furthest fixture. Its purpose is to recirculate the hot water back to the tank so that the water in the line is kept hot. It could be done with a pump or using gravity/convection.

  6. #6
    DIY Junior Member dmkraft's Avatar
    Join Date
    Aug 2009
    Location
    Wisconsin
    Posts
    8

    Default

    It does seem like it takes longer for the hot water to reach the fixtures now. It might just be my imagination. Any advise on whether it is worthwhile hooking up again?

    Thanks for your help.

  7. #7
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,675

    Default

    If it worked without a pump before then it should still work if you hook it up. I am considering putting in a recirc so IMHO, it would be worth it considering most of the heavy lifting has already been done.

Similar Threads

  1. question on water heater venting (orphaned water heater)
    By harveymasons in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 08-23-2010, 06:11 AM
  2. Water heater question - cold water, water leaking thru overflow pipe
    By jonyi in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 6
    Last Post: 09-26-2009, 01:26 PM
  3. Hot water heater question
    By martin1b in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 27
    Last Post: 10-29-2008, 08:06 PM
  4. Water Heater Question
    By MikeG in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 4
    Last Post: 12-10-2007, 07:49 PM
  5. Water Heater Pan Question
    By molo in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 20
    Last Post: 02-20-2007, 03:56 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •