Water Heaters
Plumbing Chapter 5
General: M2005 - G2406 - G2448
Water heaters are required to meet all code requirements, plus manufacturers requirements.
Water Heaters General
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M2005.2 G2406.2 |
Prohibited Locations |
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M2005.2.1 |
Water Heater Access |
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502.3 |
Water heaters installed in attics. |
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503.1 P2903.9.2 |
Water Shut Off Valve |
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P2801.6 |
Catch Pan and drain |
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P2801.7 |
Seismic Bracing |
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P2804 |
(T & P) Relief Valve Requirements |
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M1307 M1307 |
Impact Protection and Elevation off Floor Elevation of 18 inches from ignition source |
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P2903.4.1-2 |
Thermal Expansion Protection (secondary pressure relief) |
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P504.2 |
Bottom Fed Vacuum breaker Requirements |
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P504.3 |
Electrical and Fuel Disconnect |
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N1103.5.2 N1103.5.3 |
Demand recirculation water heaters Requirements for insulating hot water pipes |
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P2802 |
Water Heater Solar Requirements |
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P2803 501.2 |
Water Heater Space Heating Requirements |
Gas Heaters
Combustion Air and venting and dilution air requirements
Sections G2006---2407---2408---2409
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G2406.2 |
Prohibited Locations |
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G2407.1 |
Combustion air |
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G2407.5 |
Appliance combustion air |
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G2407.2 |
Appliance location |
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G2407.3 |
Draft hood/regulator location |
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G2407.4 |
Make up air required |
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G2407.5 |
Indoor combustion air |
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G2407.6 |
Outdoor combustion air |
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G2408.2 |
Elevation of ignition source |
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G2408.2.1 |
Installation in garages |
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G2408.4 |
Clearance from grade |
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G2408.5 |
Clearance from combustibles |
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G2409.1 |
Clearance reduction allowances |
CO Vent Requirements:
Unless specified, manufacturer’s instructions should be followed. Venting code references are listed below.
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Code Reference |
Description |
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G2426.1 |
General requirements |
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G2426.5 |
Installation Requirements |
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G2426.2 |
Required connectors |
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G2426.4 |
Shielding from insulation |
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G2426.7 |
Protection against damage |
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SECTION G2427 |
Venting of appliances |
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G2427.3.5 |
Above air handling spaces |
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G2427.4 |
Vent type required for appliance category (I.E. Type 1 or Type 4) |
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G2427.4.1 |
Plastic Vent Pipes |
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G2427.5.4 |
Chimney roof terminations |
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G2427.6.4 |
Gas vent roof terminations |
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G2427.6.7 |
Exterior wall terminations |
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G2427.6.5 |
Minimum height requirements |
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G2427.7.1-13 |
Single wall vent pipe |
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G2427.10.3 |
Vent connector requirements |
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G2427.12 |
Draft hoods and controls |
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G2429 |
Direct vent and integral vent systems |
Gas lines for appliances
G2419.4 (408.4) Sediment trap
SECTION G2420 SHUTOFF VALVES
APPLIANCE GAS CONNECTIONS
G2422.1 Connecting appliances
G2422.1.1 Protection from damage
G2422.1.2.3 Prohibited locations and penetrations
