Smart questions
Smart answers
Smart people
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Donate Today!

Do you enjoy these
technical forums?
Donate Today! Click Here

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

PAFred (Electrical) (OP)
5 Dec 04 20:00
Can someone tell me why my cold water pressure is greater than my Hot water pressure as it comes from the spigot?
My tank switch is set at (off-60PSI) and has a differential pressure of (10 psi).
I've taken the hot water tank check valves out and inspected them for sticking or clogs but found them ok, I even for the sake of it replaced the hot water check but stimm pressure is lower on the hot water side than the cold.   I'm at a loss.
ChrisConley (Mechanical)
6 Dec 04 16:09
Could be that your hot water lines are undersized. Has the problem always existed, or is this a new problem? Could also indicated some other obstruction in the DHW line; a kink, hard water deposits, etc.

I'd recommend hiring a plumber.
hydrae (Mechanical)
7 Dec 04 20:24
PAFred
You have check valves on the hot water tank? how strong are the springs or are the just a flap type.
Undersize or corroded lines will not reduce the static pressure just the available flow, are you checking pressure or just observing the flow?
Hydrae
PAFred (Electrical) (OP)
7 Dec 04 20:31
I have been keeping a eye on the pressure as well as noteing lower flow rate at the spigot when I switch to hot from cold.  Flow rate is definantely less on the hot side. The checks are no more than a plastic ball in a piece of pipe that acts to keep from heateing the entire hot water line when water isnt being used.
hydrae (Mechanical)
7 Dec 04 20:39
PAFred
You are measuring the pressure when the water is flowing? if so then your issue is under sized pipe, corrision, or some sort of blockage.  When you shut the water off does the pressure return to the same level as the cold water pressure?  If not, then look at a possible leak.
Hydrae
PEDARRIN2 (Mechanical)
9 Dec 04 7:53
You also might want to look at how your system is configured.  If the cold water has to travel a distance to your water heater, then the heated water has to travel some distance to your fixture, the piping losses could add up.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close