I'm done buying lousy filter relief valves

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
20,897
Bedford, TX
64,

I have a VS pump so I would have used a 30 lb. gauge... But other than that, it is a thing of beauty.. :thumleft:

Thanks,

Jim R.
 

Dirk

Gold Supporter
TFP Guide
Nov 12, 2017
8,624
Central California
Pool Size
12300
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Oh, timely! I think I spotted a leak at my gauge just the other day. Probably just the o-ring. But now you've inspired me! Thanks for sharing. I'll have to check if they have a 30psi version...
 
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frbruno64

Bronze Supporter
64,

I have a VS pump so I would have used a 30 lb. gauge... But other than that, it is a thing of beauty.. :thumleft:

Thanks,

Jim R.
You make a good point about using a gauge with a smaller range. I'm on the fence about changing the pressure gauge to a high quality, accurate instrument. Do you have a suggestion for a brand and model? For non-consumable items, my moto is to buy it once and never deal with it again. I'm told old and too cranky to cheap out.
 
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Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
20,897
Bedford, TX
64,

I bought mine from TF-testkits.. I think they were about $20 bucks each... I doubt that they are "instrument" grade, but they are glycerin filled and work great for me..


Looks like they are only $15 bucks each..

Since my filter pressure is normally only about 2 lbs. or so, at 1200 RPM, I need the 30 lb. gauge to see the needle move at all.. :mrgreen:

Thanks,

Jim R.
 

Dirk

Gold Supporter
TFP Guide
Nov 12, 2017
8,624
Central California
Pool Size
12300
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Would frbruno64's gauge screw right into the housing of a Pentair filter? I want to replace the works. Jim's gauge is only about half the parts needed...
 

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JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
17,630
Tucson, AZ
Pool Size
16000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
The Pentair high flow air relief valve has two features that are important -

1. It allows for a very high flow rate of air to be relieved quickly.

2. It’s a plastic male thread into a female fiberglass threaded opening.

While feature #1 may or may not be desirable, feature #2 is essential in good plumbing design - you NEVER screw a metal male thread into a non-metallic female thread. The differential in thermal expansion coefficient can lead to leaks in the best case scenario OR cause cracking of the shell in the worst case scenario.

Time will tell if your “upgrade” is a success but, as for me,$30 on a new plastic valve every 2-3 seasons is really no big deal.
 

frbruno64

Bronze Supporter
The Pentair high flow air relief valve has two features that are important -

1. It allows for a very high flow rate of air to be relieved quickly.

2. It’s a plastic male thread into a female fiberglass threaded opening.

While feature #1 may or may not be desirable, feature #2 is essential in good plumbing design - you NEVER screw a metal male thread into a non-metallic female thread. The differential in thermal expansion coefficient can lead to leaks in the best case scenario OR cause cracking of the shell in the worst case scenario.

Time will tell if your “upgrade” is a success but, as for me,$30 on a new plastic valve every 2-3 seasons is really no big deal.
I got disgusted replacing the plastic Pentair filter valves every few years. Each replacement cost about $25. For $38.64, I got a beautifully machined brass valve and pressure gauge assembly, including tax and shipping, It's a thing of beauty and will last forever. Take that, Pentair.

Manufacturer Link for

Amazon link
 

frbruno64

Bronze Supporter
I intend to install a high quality, accurate pressure gauge this season. Research led me to Ashcroft, a manufacturer of industrial gauges. www.ashcroft.com

As luck would have it, the territory sales manager is a fellow pool lover. He provided these two pearls of wisdom related to gauges and pools.
- Dry gauges avoid temperature issues associated with liquid filled gauges.
- Consider a range that keeps the pointer as close to the 12-o’clock position as possible when filter is operating

At his suggestion, I purchased the Ashcroft 1009 Duralife Pressure Gauge, Part Number: 25-1009-SW-02L-XLL-30#
- Industrial grade
- Accuracy: 1%
- PLUS! dampening system for vibration/pulsation (liquid-filled performance in a dry gauge)
- 316L Stainless Steel case
- Range 0-30 psi

Link to 1009 Data Sheet

Attached is a photo of the Ashcroft 1099 gauge. Also attached is a photo of the internal workings of the Pentair OEM gauge, which I was compelled to pull apart to satisfy my curiosity.

Ashcroft gauge and box
Ashcroft 1099 gauge.jpg Ashcroft box.jpg

Inside and face of Pentair OEM gauge
Pentair OEM Back.jpg Pentair OEM Dial.jpg
 
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ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
23,871
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
I take it you don’t have a VS pump. Someday when you get a VS pump and begin running your pool at low RPMs you will find your normal filter PSI in 5 or less. The pointer does not stay around 12 o’clock with modern pool equipment.
 

frbruno64

Bronze Supporter
I take it you don’t have a VS pump. Someday when you get a VS pump and begin running your pool at low RPMs you will find your normal filter PSI in 5 or less. The pointer does not stay around 12 o’clock with modern pool equipment.
Good point. They offer 0-10 psi and 0-20 psi ranges. Maybe I should have opted for the 0-20 range to cover both scenarios.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
23,871
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Good point. They offer 0-10 psi and 0-20 psi ranges. Maybe I should have opted for the 0-20 range to cover both scenarios.

No, because a VS pump can have high pressures at max RPM.

The whole idea that the needle should be towards vertical is old think.
 
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