Installing pressure gauge

[bogen2]

I am getting ready to install a water pressure gauge in my rig. I found a flush mount glycerin filled gauge with a rear mounted fitting that should work very well. I was concerned about the possibility of the liquid filled gauge freezing here in Canada but it appears glycerin freezes below -40 so hopefully it will be ok.

I will be running 2-3 feet of pex from a tee to the mounting location. I am wondering about the air that will be trapped in the line before the gauge. Will I get accurate pressure readings with air in the line or do I need to come up with a way to bleed this air off at the gauge?

Bob

[TedS]

Pressure is pressure. Once the water squeezes the air to line pressure the gage will read correctly. This will be a case of static pressure rather than dynamic, so no worry about response.

[Cate&Rob]

I would agree that the gauge will read correctly even if there is air in the line. I would disagree that you will only be monitoring static pressure. You will be able to see a variety of dynamic (changing) pressure scenarios. Air in the line will damp the gauge response, but not enough to even notice. Good choice on the glycerin damped gauge . . . this will be very easy to read.

Rob

[howson]

I am getting ready to install a water pressure gauge in my rig. I found a flush mount glycerin filled gauge with a rear mounted fitting that should work very well. I was concerned about the possibility of the liquid filled gauge freezing here in Canada but it appears glycerin freezes below -40 so hopefully it will be ok.

I will be running 2-3 feet of pex from a tee to the mounting location. I am wondering about the air that will be trapped in the line before the gauge. Will I get accurate pressure readings with air in the line or do I need to come up with a way to bleed this air off at the gauge?

Bob

Can you post a picture of the gauge you selected and reference information?

[TedS]

Pressure variations will be slow enough to consider only the static response of the gauge. Not trying to measure the ripple of pump delivery.

[Jlawles2]

Also over time if the line stays full of water, the air may actually dissolve into the water. Similar to what happens in the HWH with it's air baffle at the top.

[bogen2]

Can you post a picture of the gauge you selected and reference information?

I’ll post some pics of the install when it’s done. Gauge is from Princess Auto, a Canadian company similar to Harbor Freight in the US. It’s more hardware and industrial supply than auto related. Great place for DIYers.
https://www.princessauto.com/en/100-...t/PA0008889735

Bob

[Cate&Rob]

I recognize that gauge! There is always a "raised eyebrow" when Canadians reference "Princess" Auto with Americans. Does seem like a curious name for a parts and tools supply place . We are very used to the name and the stores here in Canada. The first one was on "Princess Street" in Winnipeg, Manitoba . . . hence the name. https://www.princessauto.com/en/ourStory

Rob

[StephenO]

You gotta love Princess Auto, or as some of us say PA. They have a little bit of everything, and whenever you go, you can't just grab that one item and leave. You always need to take a full look around, see what random tool or item you never knew that you needed

[Cate&Rob]

StephenO

Then when you bring home that random tool/part/gadget that you might need some day and go to put it in the drawer where you keep those type of things . . . there is already one there that you forgot about, from some previous trip to PA . It has happened to me . . . more than once!

Rob

[StephenO]

StephenO

Then when you bring home that random tool/part/gadget that you might need some day and go to put it in the drawer where you keep those type of things . . . there is already one there that you forgot about, from some previous trip to PA . It has happened to me . . . more than once!

Rob

Just keeping the spare inventory well stocked, that's all!

[Country Campers]

You Canadiens get all of the good stuff and places to shop . You also get Molson Golden , Malt Duck ( if that is still around), and great fishing lakes that are so far out there you have to take a train ride to get there ( I know that may have been a long time ago).

Brian

[bogen2]

You gotta love Princess Auto, or as some of us say PA. They have a little bit of everything, and whenever you go, you can't just grab that one item and leave. You always need to take a full look around, see what random tool or item you never knew that you needed

You never know what you need until you get there.

Bob

[StephenO]

I can't argue Country Campers , we do have some awesome fishing spots. Of course the best ones are the hardest to get too!

[Cate&Rob]

You Canadiens get all of the good stuff and places to shop . You also get Molson Golden , Malt Duck ( if that is still around), and great fishing lakes that are so far out there you have to take a train ride to get there ( I know that may have been a long time ago).

Brian

50% of all the lakes in the world are in Canada . . . and they all have fish of some kind . We also have a countless number of good beers . . . but, I had to look up Malt Duck . . . it's American LOL!

Rob