04:33AM | 11/13/04
Member Since: 11/12/04
3 lifetime posts
I just replaced the old hot water heater on 11/11 due to the heater was 18 years old, and started leaking. Everything appeared to be working fine on the new heater; About a day after the install, all of the sudden, I have low HOT water pressure, cold pressure is fine? I have checked both gate valves going to the water heater, both are open fully. I had replaced all the galvanized pipes in the house about 6 years ago; I removed the Aerators on all faucets to rule out that they were clogged, still low hot water pressure? Everything was fine before and for a full day after the new heater was put in? I am at a loss as to what could be the problem? I did put 2 new of those flexible copper supply lines on the heater, one of them twisted more than I wanted, but is not fully closed (not even half way). Am I overlooking something, or what could be the problem? Thanks in advance for any help!!



06:21AM | 11/13/04
If all faucets have low hot pressure then it seems likely the problem is in the vicinity of the heater. Gate valves are a problem because the gate comes loose from the stem. The stem can turn and turn but doesn't move the gate. It is possible that after the gate was open it has slipped and partially closed. I don't know why you have two gate valves. Additionally, not all flex connectors are full bore, however you state you did have good pressure for a day.

If you have heat trap nipples one of them may have become partially stuck. I would disconnect the outgoing hot supply and check your pressure there.


06:33AM | 11/13/04
Member Since: 11/12/04
3 lifetime posts
Thanks for the quick response! I forgot to mention that when I replaced the galvanized pipes, I went to copper, and I also installed an extra gate valve near the heater, in case if I had to ever replace it, I could just turn both valves off right there & swap the heater out. When I disconnect the outgoing hot supply, what would be the best way to check the pressure?

Thanks, Rob


06:36AM | 11/13/04
Member Since: 11/12/04
3 lifetime posts
Forgot one more thing, since I installed a gate valve on the hot water side, which it probably really wasn't necessary now that I think about it; would you recommend taking that valve back out?

Thanks again!


07:28AM | 11/13/04
Water expands as it heats and will back up in the water pipes. We used to think that having a valve on each side could potentially create a bomb but now we have heat nipples that do the same thing. I don't see a reason to remove it. lever ball valves are generally maintenance free and last decades. Gate valves sometimes don't even last five years.

To check your pressure attach a pipe to the outgoing flex connector directed towards a bucket. When you do, look up and see if that gate is all the way open. I'm presuming that you replaced the galvanized piping previously. But if it was the same time as the heater then you could have blockage in the hot stems of the faucets.


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.



Post_new_button or Login_button

For more on holiday decorating, consider: How To: Keep A Christmas Tree Fresh 58 Outstanding DIY Ornaments Holida... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled entryway will get you in the outdoor mood. Grab your coat... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR carpet tiles are a simple and affordable way to customize a floor covering for any space. You can make anything from ... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... Dark wood shelving and a matching upholstered bench keep this closet sleek and refined. The large window brightens the sub...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon