Failed Pressure Gauge or bigger problem?

nhamp07

Bronze Supporter
Jul 24, 2018
130
New Braunfels, TX
Our low temp was 8 in this entire thing, never lost power for more than 85 minutes during the rolling blackouts. Nothing froze and no leaks now. However, I noticed during the cold the pressure on the filter was in the 30-40 range with the pump on freeze protect high mode. After it warmed up, I took apart the filter and cleaned it. With the lid on the ground the gauge read 20 PSI. When I put it back together, 20 seems to be the new zero and it goes up from there. Did the freeze kill the gauge or could there be a bigger problem I can't see?
 

Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
5,515
NY
*Most* gauges unscrew from the pressure release housing.

this one looks like it might not, but check the back of gauge itself to see if it’s 2 pieces or one. If it’s one piece (molded from the front half to the other with no seams) you’ll need the whole assembly
50A36F31-80B4-4914-8F4C-86F105BE4320.png
 

duraleigh

Admin
Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
34,498
Sebring, Florida
The Jandy guage has a pressure release valve to release pressure before taking apart.
Pump not running, there is no pressure in the system. I don't think I understand the need for a relief valve on the guage.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
22,171
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
That is one of the annoying things about Jandy equipment. Their use of proprietary parts like that combination gauge and filter air relief valve so you have to buy their expensive replacement part instead of an a standard gauge.
 
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wireform

Silver Supporter
In The Industry
Aug 15, 2017
1,669
Spring Valley, NY
By the pictures it looks to have a regular pipe thread but can't tell for sure. If in fact why can't the op replace with a regular psi gauge and just not have the air bleed portion of it. Personally I like the fact you can bleed out the air.
 

duraleigh

Admin
Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
34,498
Sebring, Florida
An air bleed valve is to bleed air out of the filter to assist in priming (or draining). All filters should have them and they are useful

A pressure relief valve is just like it says to relieve pressure......usually automatically and I can't figure out it's use in a pool. Turning off the pump does the same thing.

Perhaps we are getting mixed up by semantics. The most correct term for the valve that allows air to escape from the filter is "air relief valve"
 

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