Dimension of a U Tube

The dimensions of a U tube manometer vary. The range can be from 6 inches to 50 inches and above. In between are U tubes in the 10, 15, 20 and 30 inch range. 
 
What is a U Tube Manometer? 
 
The manometer is a piece of equipment used to assess propane system pressure. The correct pressure is required for a particular application to work correctly. When the proper pressure is set, the device will work at the optimum level. The manometer can also be used to check if there is a gas leak. 
 
Make Your Own Manometer 
 
You will need the following tools and materials. 
 
4 or 6 clamps
1/2” vinyl tubing 60” long
6“ wide by 24” long wood
 
These instructions can be used regardless of the dimensions of a U tube. 
 
Directions
 
Measure a foot down off the board. Make a line there. This line is zero. Now make another line across the board. Make the lines at half an inch intervals over the zero line. Note these lines as 1, 2, 3 and so on. The highest most go for is 16. 
 
Get the clamps. Set the vinyl tube on the board to make a shape like a U. One end will be extending and the other uniform to the top of the board. Put some water or other colored liquid in the U. Fill it up to the zero mark. 
 
When determining propane pressure, the liquid in one of the tube’s side is lowered. The other side is raised. This means that every 1/2 inch at the scale is indicative of a single water column pressure. 
 
How to Perform a Leak Examination
 
Step 1

Take off the stove top cover and the assemblies of the burners. Connect an end of the manometer tube on the outlet of the burner. Set the valve to on.
 
Step 2

Open the propane tank’s valve. Ignite the burner (just one will be enough). Let the flame settle down. When the flame is burning consistently, turn the burner off. Now the valve has to be shut down. 
 
Step 3

Bleed pressure until the U tube shows eight water column. Allow this to stand for 15 minutes. There’s a leak if the manometer drops at any point . 
 
The dimensions of a U tube manometer is something you should determine before you build one. This will keep you from making mistakes in the assessment. Try to be as accurate with your measurements as much as possible. 

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