15
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping and connections for leaks after installing or servicing. Correct all
leaks at once.
WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to
all joints. If bubbles form, there is a leak. Correct all leaks at once.
Presure Testing Gas Suply Piping System
Test Pressures In Excess Of 1/2 PSIG (3.5kPa)
1. Disconnect heater with its appliance main gas valve (control valve) and equipment shutoff valve from
gas supply piping system. Pressures in excess of 1/2 PSIG will damage heater regulator.
2. Cap off open end of gas pipe where equipment shutoff valve was connected.
3. Pressurize supply piping system by either using compressed air or opening gas supply valve.
4. Check all joints of gas supply piping system. Apply mixture of liquid soap and water to gas joints. If
bubbles form, there may be a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve to gas suply. Check reconnected fittings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve
2. Pressurize supply piping system by either using compressed air or opening natural supply tank valve.
3. Check all joints from gas meter to equipment shutoff valve. Apply mixture of liquid soap and water to
gas joints. If bubbles form, there is a leak.
4. Correct all leaks at once.
Pressure Testing Heater Gas Connections
1. Open equipment shutoff valve.
2. Open gas supply tank valve.
3. Make sure control knob of heater is in the OFF position.
4 Check all joints from equipment shutoff valve to control valve. Apply mixture of liquid soap and water to
gas joints. If bubbles form, there may be a leak.
5. Correct all leaks at once.
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