A vent valve is installed on a quarter-inch soft copper tubing loop connected to the branch or main piping, with a minimum six-inch vertical clearance maintained below the valve. The vent valve is positioned at the most accessible location within the piping subcircuit.
COILS AND SUBCIRCUITS 1/4" SOFT COPPER TUBING VENT VALVE, LOCATE VALVE AT MOST ACCESSIBLE LOCATION BRANCH OR MAIN PIPING 6" MIN. A
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