Dynamic pressure drop after regulator?

Users who are viewing this thread

Vitaliy

New Member
Messages
73
Reaction score
0
Points
0
Location
Massachusetts
Hi,

About a week ago I installed Conbraco Series-36 pressure regulator.
City water pressure is 90+psi. Static pressure right after the regulator
is 50psi (default setting). Whenever water is used City pressure stays
about the same but pressure after the regulator (pressure gauge is
about 5†away from the regulator) drops down to 40psi or even 30psi
(depend on water usage). This is totally unexpected behavior. At the
far end (next to open faucet) pressure may drop significantly (even
down to 0psi) but right after the regulator it should be close to the
whatever it set to (50psi). Am I right? All my plumbing pipes are 1/2â€
and closest faucet is about 15-20 feet away.
Something is wrong with this picture but what?
What should I check and how to correct/fix this problem?
Is my regulator simply broken and must be replaced?

Thank you,

- Vitaliy
 

hj

Master Plumber
Messages
33,602
Reaction score
1,041
Points
113
Location
Cave Creek, Arizona
Website
www.terrylove.com
regulator

The only way the pressure after the regulator can drop is if the demand is greater than the regulator can deliver. Your 1/2" pipes should not be able to draw that much water, so the assumption is that the regulator, the control valve ahead of it, or the water line to the regulator is deficient.
 

Vitaliy

New Member
Messages
73
Reaction score
0
Points
0
Location
Massachusetts
OK,
pressure right before the regulator is always 90+psi static or dynamic
regardless of water usage. Pressure right after the regulator is 50psi
static and drops down to 30-40psi as soon as water is used. Looks like
the problem is regulator itself.
Is this correct assumption?
This is Conbraco, Series-36 regulator and it is only a week old.
Problem started immediately after I installed this regulator, so it is
very unlikely that strainer already is clogged.
Is this just my luck or Conbraco regulators are not good in general?

Thank you,

- Vitaliy
 

Jimbo

Plumber
Messages
8,918
Reaction score
18
Points
0
Location
San Diego, CA
Don't rule out the possibility that the strainer got clogged by debris loosend inside the shutoff valve during install. Check the strainer.
 

Vitaliy

New Member
Messages
73
Reaction score
0
Points
0
Location
Massachusetts
Strainer looks nice and clean.
I tried to setup 50psi dynamic pressure wile water was running and
noticed strange regulator behavior – it kind of was trying to avoid
setting between 40 and 50psi. In direction “from low to high†pressure
was smoothly increasing up to 40psi and then jumped to a bit above 50psi.
The same story in opposite direction – smoothly goes down to 50psi and
then jumps to 40psi. As of now I set pressure to 50psi dynamic. Static
pressure is a bit over 60psi – not too bad. But this does not look right. Should I replace regulator?

Thank you,

- Vitaliy
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks