SCBA tank psi not matching compressor

I would say - cross reference....
but ones the tank cools down you shall expect way less pressure anyway...
In my setup I have 3 gauges, one 45mm OD on YH + one larger 60mm OD inline + one 45mm OD on the tank valve, and usually I am not basing decisions on YH...

Pressure is force not work. No matter where a gauge is in the gas circuit, if there is no flow, the pressure will be the same everywhere in that circuit. If you have different gauge pressure readings, you have at least one faulty gauge.

bigHUN said:

I would say - cross reference....
but ones the tank cools down you shall expect way less pressure anyway...
In my setup I have 3 gauges, one 45mm OD on YH + one larger 60mm OD inline + one 45mm OD on the tank valve, and usually I am not basing decisions on YH...

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I charge air tanks submerged in ice water and by the time I get to the woods. (2-3hrs) pressure is still @ 4500.

My YH pressure gauge does not work and hasn't for months, maybe a year or more. It's such an obviously crappy gauge I haven't bothered to replace it. My fill set came from Joe Brancatto and has what seems to be a dependable gauge. That is what I go by. The only time I look at the gauge on my Scott tank, the one it came with, is if the valve on the bottle is closed so the fill set gauge isn't seeing anything. It may be a good gauge but I just take it as a rough indication of how much air is left. I run the YH until the fill set gauge reads 300 bar and then I shut it down. I know the tank pressure will fall a bit as it cools but I'd rather be a little conservative. I've also noticed my fill set gauge tends to indicate a higher pressure than the gauge on my guns. I don't know which is "right" but I always go by the fill set gauge. I may be wrong but it seems like it is the best made and the most likely to be accurate.