MEANLIN MEASURE Stainless Steel 1/4" NPT 2.5" FACE DIAL Liquid Filled Pressure Gauge WOG Water Oil Gas Lower Mount（0~30Psi）

Is the 0-160psi bottom-mount gauge nsf-61 (potable water) compliant? are there any markings of that nature on the gauge itself or the packaging?

Can i use this to meassure pressure on a espresso machine?

Can this be used to measure natural gas pressure in a residence?

I am looking for a liquid filled pressure gauge that measures inches of water for a natural gas line on an industrial oven, will this work??