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How to build a manometer

How To Test Gas Pressure

Manometer to test LPG pressure

Although most gas appliances are not sensitive to slight gas pressure variations, performance of a gas refrigerator is very dependent upon the correct gas pressure. Checking the gas pressure should always be a part of a any gas fridge maintenance program or gas refrigerator repair. We suggest to have your gas supplier check your gas pressure or do it yourself with the below instructions.

Parts needed;

Approximately 60" of clear 3/8" flexible plastic (vinyl) tubing.

Staples or tie straps to hold tubing to back plate.

6" x 16" wood board or sheet metal.

Ruler.

1.) Attach the plastic tubing to the back board using staples or tie straps in a "U" shape 12" to 14" in both directions as per the below drawing.

2.) At about the midway point of the tubing, mark the back board with a zero location.

3.) From the zero location, place marks every 1/2" above and below. Number the marks every one inch. Place a target arrow mark at 5 1/2" on top and bottom. This target will equal 11 inches of water column (W.C.).Monometer to test gas pressure

 

To test gas pressure;

1.) Fill the Manometer "U" tubing with water until both sides reach zero.

2.) Connect free end of tubing to the gas supply line. A slip fit or hand held fit should be sufficient. Be sure it does not leak.

3.) Hold the Manometer vertical and slowly turn the gas supply on.

4.) The pressure will push the water down the input side and up the output side. The combined sum of both distances is the "inches of water column pressure". The target is 5 1/2" + 5 1/2" = 11 inches of W.C.

5.) Most high quality regulators will have an adjustment screw usually covered with a plug or plastic screw cap. Turn the adjuster screw slightly and repeat steps 3 & 4 until 11" W.C. is achieved.

 

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Review:
"I can't praise Mike enough for going above and beyond in helping me with a thermostat issue for a propane refrigerator. There comes a point where most people would shrug..." read more
- Will Forest
 
Review:
"Fast, knowledgeable and they know their product. ..." read more
- Eric Schwennesen
 
Review:
"This is my second purchase and these Dynamx guys have always done right by me: lots of help and personal service. Very friendly and helpful...." read more
- Beverly
 
Review:
"Knew the answers to all my questions. Helpful, knowledgable, and made me feel like they were concerned. ..." read more
- Jim de Boer
 
Dynamx inc 5 out of 5 based on 24 ratings.
Welcome to Warehouse Appliance - Your source for propane refrigerators and gas freezers
5 out of 5 stars I can't praise Mike enough for going above and beyond in helping me with a thermostat issue for a propane refrigerator. There comes a point where most people would shrug their shoulders, but Mike kept on AND responded to my questions promptly. Most propane appliances are priced within just a few dollars of each other. When you need service and help, especially if you live off grid, where a service call would be wicked expensive, that's when who you buy it from really counts. Mike was beyond outstanding; I live in Vermont, he's in Arizona, and we figured this out via email. I can't recommend him enough. Anyone is welcome to contact me directly about my experience. I don't have the time to troll or be a shill. I only write these when they really matter. It's a small payback for the help Mike gave me. Will Forest Montpelier, Vermont
Welcome to Warehouse Appliance - Your source for propane refrigerators and gas freezers
5 out of 5 stars Fast, knowledgeable and they know their product.
Welcome to Warehouse Appliance - Your source for propane refrigerators and gas freezers
5 out of 5 stars This is my second purchase and these Dynamx guys have always done right by me: lots of help and personal service. Very friendly and helpful.
Welcome to Warehouse Appliance - Your source for propane refrigerators and gas freezers
5 out of 5 stars Knew the answers to all my questions. Helpful, knowledgable, and made me feel like they were concerned.