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American Dryer Corp.
113363 - 37
NOTE: A consistent water column test pressure of 3.5 inches (8.7 mb) for natural gas and 10.5 inches
(26.1 mb) for propane dryers is required at the gas valve pressure tap of each dryer for proper
and safe operation.
A plugged tap 1/8” N.P.T. minimum, accessible for a pressure gauge connection, must be installed in the
main gas supply line immediately upstream of the dryers.
IMPORTANT: Pipe joint compounds that resist the action of natural gas and propane gas must be
used.
IMPORTANT: Test ALL connections for leaks by brushing on a soapy water solution (liquid
detergent works well).
WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!
IMPORTANT: The dryer and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of
1/2 psig (3.5 kPa).
NOTE: The dryer must be isolated from the gas supply piping system by closing its individual manual
shutoff valve during any pressure test of the gas supply system at test pressures equal to or less
than 1/2 psig (3.5 kPa).
