Water Heaters

Water Heaters

 IRC Chapter 28 

IRC Chapter 20

IRC Chapter 24     

IRC Section N1103 

Plumbing Chapter 5

General: M2005 - G2406 - G2448

Water heaters are required to meet all code requirements, plus manufacturers requirements.

Water Heaters General

M2005.2

G2406.2

Prohibited Locations

M2005.2.1

Water Heater Access

502.3

Water heaters installed in attics.

   503.1        P2903.9.2

Water Shut Off Valve

P2801.6

Catch Pan and drain

P2801.7

Seismic Bracing

P2804

(T & P) Relief Valve Requirements

G2408.2-3

Impact Protection and Elevation off Floor

P2903.4.1-2

Thermal Expansion Protection (secondary pressure relief)

P504.2

Bottom Fed Vacuum breaker Requirements

P504.3

Electrical and Fuel Disconnect

N1103.5.2

N1103.5.3

Demand recirculation water heaters

Requirements for insulating hot water pipes

P2802

Water Heater Solar Requirements

P2803

501.2

Water Heater Space Heating Requirements

 

Gas Heaters

Combustion Air and venting and dilution air requirements

Sections   G2006---2407---2408---2409

G2406.2

Prohibited Locations

G2407.1

Combustion air

G2407.5

Appliance combustion air

G2407.2

Appliance location

G2407.3

Draft hood/regulator location

G2407.4

Make up air required

G2407.5

Indoor combustion air

G2407.6

Outdoor combustion air

G2408.2

Elevation of ignition source

G2408.2.1

Installation in garages

G2408.4

Clearance from grade

G2408.5

Clearance from combustibles

G2409.1

Clearance reduction allowances

 

 

CO Vent Requirements:

Unless specified, manufacturer’s instructions should be followed.  Venting code references are listed below.

Code Reference

Description

 

G2426.1

General requirements

G2426.5

Installation Requirements

G2426.2

Required connectors

G2426.4

Shielding from insulation

G2426.7

Protection against damage

 

SECTION G2427

Venting of appliances

G2427.3.5

Above air handling spaces

G2427.4

Vent type required for appliance category (I.E. Type 1 or Type 4)

G2427.4.1

Plastic Vent Pipes

G2427.5.4

Chimney roof terminations

 

G2427.6.4

Gas vent roof terminations

G2427.6.7

Exterior wall terminations

G2427.6.5

Minimum height requirements

G2427.7.1-13

Single wall vent pipe

G2427.10.3

Vent connector requirements

G2427.12

Draft hoods and controls

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