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Not helpful to your question but what do you use your manometer for regularly? Testing faulty equipment or new installs or a mix? Never seen one honestly and I’m curious if it’s worth an investment to have, even tho I haven’t touched one and we do gas installs regularly. Lines and bigger equipment but the most we do is air test and roll.
 

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Discussion Starter · #3 ·
As you probably know, pressure testing is one thing, checking pressure is another.

the manometer may not be used regularly, but is wise to have if you run gas or do service that involves gas.

Im a mechanical contractor as well, limited to fuel gas only, but knowing what your water column measures are for some jobs is crucial.

Hope some of this helps shed light.
 

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@Pipewrench78 The one I have is a UEI EM-201 it runs around $200 but if you’re not using it daily I don’t think you really need to spend that kind of money.

@Lickitlikeafritter If you do any troubleshooting or startup reports of gas equipment a digital manometer is a must have tool. If you call a factory tech support line with an issue on a gas burner 99 out of 100 times the very first question they ask you is “What’s the gas pressure?”
 

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I use a fieldpiece dual port digital manometer.

Great for setting burner pressure, regulator pressure, house pressure, checking for leaks, adjusting high and low fire on tankless water heaters, etc, etc.

I like the dual port so I can read pressure drop across the high and low side of a regulator. Helps diagnose problems.
 

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I use a fieldpiece dual port digital manometer.

Great for setting burner pressure, regulator pressure, house pressure, checking for leaks, adjusting high and low fire on tankless water heaters, etc, etc.

I like the dual port so I can read pressure drop across the high and low side of a regulator. Helps diagnose problems.
Yep, I should’ve bought the dual port but my supply house only had the single port at the time and I didn’t know the dual existed. When mine breaks I’ll get one.
 

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On a tankless the pressures change too rapidly to use a water tube type manometer to be accurate. You have electric solenoid valves opening and closing rapidly.
He said needle, not water.
 

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I also use the UEI.

Before I (ehhhemmmm) I used a Dwyer that I really liked. But it met the demise of something in a plumber’s shirt pocket and bending down while said item sort of just slips out of said plumber’s shirt pocket while the plumber utters some words that would make Rodney Dangerfield blush.

I will probably get the Dwyer again at some point. I wind up dealing with a lot of vacuum systems where pressures are like -3” wc.

They also have differential pressure manometers if you need it.
 

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He said needle, not water.
Same difference with that crappy gauge, it’s not suitable for tankless water heater service.

The water type are the most accurate for some situations, but with tankless the gas solenoids open and close rapidly during its operation. So your needle gauge will flutter.

I bought one years ago and it didn’t help me……I believe I recently threw it away.

Then I bought this one……
Wood Tool Measuring instrument Denim Hand tool

It has plastic hose connection ports and they broke off……awkward to use anyway. It’s sitting on the floor of my old work truck that I haven’t cleaned off yet.
 

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I carry the field piece dual port manometer, that has been with me for at least 10 years and has held up incredibly well. I also carry the analog one in the little blue box, I forget the name, which I use for simpler things but I recently did a comparison between the two and the analog manometer was significantly off, like four or five pounds off, so I'm pretty much sticking with the field piece unit for now. Having the Dual ports is exceptionally helpful when working on larger or multi-valve units. Get yourself a nice carrying case for it and keep a bunch of black steel adapter pieces in there and you will never regret it.
 

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Then I bought this one and it’s the best I’ve used.
Gadget Cable Gas Audio equipment Electrical wiring

I keep it in this case with a few other things. A rinnai keypad for units that don’t have it or I can install it at the unit to troubleshoot.

Gas meter union washers.

gas sizing quick reference.

various fittings…..
Gadget Luggage and bags Font Everyday carry Cameras & optics
 

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I use it on tankless Breh. Works just fyne.
Ok sure. 🫶

Those are spring type gauges and they’re very unreliable. The worst sold, look it up for yourself

But besides that, the needle flutters and you can’t get an accurate reading when troubleshooting when the unit is operating and modulating the gas valves.
 
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