Brochure

CONVERSION CHARTS
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TESTING METHODS
Water Test:
The DWV plumbing system is plugged leaving the top vent open.
Water is then introduced to the system, purging any trapped air that
may occur. The test passes if no water column is lost or no pressure
drop is noted on a gauge.
Air Test:
The DWV plumbing system is plugged at all openings including traps and
vents, leaving one opening as a point to both introduce and monitor the
test pressure. Air is introduced, pressurizing the system (normally 5 PSI or
less), making sure all are outside the danger zone. (See safety and usage
instructions.) The test passes if the measurable loss of pressure is within
the time and pressure allowances of the test specications.
Manometer (or U-Tube):
Also known as a nal test, the manometer test veries trap tightness in
a new plumbing system. All traps are lled with water and all vents are
then plugged. The manometer tube is rst lled with water so that it
“zeroes” out. Then the lower tube of the manometer is placed through
a trap. A second hose is then put through the same trap and a small
amount of pressure is applied. A decrease in water column measured
on the manometer scale indicates that there is a leak in the system.
Scent Test:
The DWV system is plugged at all openings except one. Liquid scent
is applied in that opening, which is then plugged. Leaks are detected
via smell.
Calculating Head Pressure/Feet of Head
1) Measure the distance of the pipe and multiply it by the slope of
the grade.
2) Measure the distance of the pipe above the plug. (Used when pipe
is vertical)
In the example above, the answer is 600 x .01 = 6 feet of head.
3) Attach a hose to a Muni-Ball
®
bypass. Raise the hose until the
ow stops. Measure the height of the water in the hose.
In the example above, the answer is 5 feet of head
UNIT = CONVERSION
FACTOR
X UNIT
Pounds per square inch = 14.5 x Bars
Gallons = 7.4 8052 x Cubic feet
Meters = .3048 x Feet
Inches of mercury = .8825 x Feet of water
Pounds per square inch = .4335 x Feet of water
Millimeters = 25.4 x Inches
Feet of water = 1.133 x Inches of mercury
Pounds per square inch = .4912 x Inches of mercury
Pounds = 2.2046 x Kilograms
Feet = 3.281 x Meters
Inches = .03937 x Millimeters
Feet of water = 2.307 x Pounds per square inch (PSI)
Inches of mercury = 2.036 x Pounds per square inch (PSI)
PSI FEET OF
HEAD
PSI FEET OF
HEAD
1 2.31 14 32.33
2 4.62 15 34.64
3 6.93 16 36.94
4 9.24 17 39.25
5 11.55 18 41.56
6 13.85 19 43.87
7 16.16 20 46.18
8 18.47 25 57.73
9 20.78 30 69.27
10 23.09 35 80.82
11 25.40 40 92.36
12 27.71 45 103.91
13 30.02 50 115.45
600 feet
1% grade
5 feet
5 feet
30 feet30 feet
In the example above, the
answer is: 30 feet of pipe
above the plug = 30 feet
of head
ALWAYS BLOCK PLUGS WHEN CONDUCTING AIR TESTS.
MEASURES CONVERSION CHART PRESSURE
CONVERSION CHART
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