Key to Code Check

Gas-Sizing Worksheet

Gas Piping

General
Gas test--3psi. {10psi-6in. mercury} for 10 {15} minutes [2416.4] {1204.3.2}
Gas meter--access opening min. 22in. x 24in. . . . . . . . . . [n/a] {1209.5}
Main shutoff ahead of meter, outside & readily accessible .[2419.2] {1209.3}
Material--wrought iron, steel (galv. or black) yellow brass [2413.1.] {1210.1}
Labeled "Gas” for other than black pipe {Cu only} . . . . .[2411.5] {1211.8}
Copper OK for low sulfur-content gas . . . . . . . . . . . .[2413.5.2] {Ø}
Corrugated stainless-steel tubing permitted . . . . . . .[2413.5.3] {pending}
Interior of pipe must be deburred . . . . . . . . . . . . . . . . .[2413.7] {1210.2}
Plastic pipe only at exterior buried . . . . . . . . . . . . . . . .[2413.6] {1210.1}\
No gas pipe in circulating or ventilating air duct . . . . . . .[2414.1] {n/a}

Underground
Metal--min. 12in. deep; plastic--min. 12in. {18in.} . . . .[2414.9] {1211.6
Plastic requires #18 tracer wire . . . . . . . . . . . . . . .[2414.14.3] {1211.19}
Ferrous pipe must be protected . . . . . . . . . . . . . . . . . .[2414.8] {1211.6}
Exposed underfloor piping min. 6in. above ground . . . . . . .[n/a] {1211.4}
Underslab only if run through gas-tight conduit [2414.11] {1211.4}
Buried plastic must connect to metal =>30in. before vertical [n/a] {1211.6}
Electrically isolate buried ferrous gas pipes . . . . . . . . . . .[2410] {1211.7}

Connections
Shutoff valve ahead of union <=6ft. {3ft.} of appliance . . .[2419.5] {1211.18}
Unions adjacent to accessible equipment only . . . . . . . . . .[n/a] {1211.13}
Drip leg if water vapor in gas . . . . . . . . . . . . . . . . . . . .[2418.2] {1211.5}
Flex connection sizing . . . . . . . . . . . . . . . . . . .T-p12 [2421.1.2] {1212.0}

Fireplace with Gas Appliance (see p.23)
Req'd valve <=6ft. {4ft.} of fireplace same room. . . . . . . .[2419.5] {1211.17}
Listed caulk around gas pipe penetration. . . . . . . . . . . .[2431.1] {901.3}
Log Lighters installed per manu. instructions. . . . . . . . .[2432.1] {3102.5.1}

Propane (L.P. Gas)
Appliance not located where gas may pool . . . . . . . . . . . . [n/a] {1213.5}
Bldg. openings below relief valves min. 5ft. horiz . . . . . . . .[n/a] {1213.9}

Individual Appliance Shutoff Valves
Shutoff valve ahead of union <=6ft. {3ft.} of appliance . . .[2419.5] {1211.18}
May be inside wall furnace access panel . . . . . . . . . . . . . .[n/a] {1211.18}

Final

Gas Appliance Connector
Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .T-p12 [2421.1.2] {1212.0}
Max. length 3ft. (6ft. range or dryer) . . . . . . . . . . . . .[2421.1.2] {1212.0X1}
Not pass-through building or appliance wall . . . . . . . .[2421.1.2] {1212.0X2}
Valve immediately ahead of & sized to connector . . . .[2421.1.2] {1212.0X3}
Aluminum alloy for dry interiors only . . . . . . . . . . . . . . .[2421.1] {1212.0X5}
Gas hose {<15ft.} outdoor portable appliance only . . .[2421.1.3] {1212.0X7}

Heat Exchanger Using Potable Water
Water separated by two separate walls single wall
if potable side pressure 10psi> than transfer fluid . . .[2902.4.2] {603.4.4}
Backflow preventer (reduced pressure) req'd on solar if chemicals used .2902.4.5] {603.0}

Bathroom
Ballcock critical level min. 1in.
above overflow pipe . . . . . . . . . . . . . . . . . . . .F-p14 [2902.3.1] {603.4.2}
Toilet & plumbing fixtures sealed at walls and floors . . .[2705.1] {408.2}
1.6gal. flush water closets (new const. only) . . . . . . . . . . .[local] {local}
Access to tub waste and overflow if slip joints used . . .[2704.1] {405.2}

Kitchen
Dishwasher air gap req'd above sink flood rim . . . . . . . . . .[n/a] {807.4}
Sink-hose attachments req. vacuum breaker . . . . . . . . .[2902.3] {603.4.8}
No connection to discharge side of disposer . . . . . . . . . . . [n/a] {405.4}
Reverse osmosis water treatment drain
through air gap . . . . . . . . . . . . . . . . . . . . . . . . . F-p15 [2907.2] {801.1}
Tub hose attachments req. vacuum breaker . . . . . . . .[2902.3.3] {603.4.7}
Shower walls non-absorbent surface . . . . . . . . . . . . . . .[307.2] {401.1}
Whirlpool tub motor access . . . . . . . . . . . . . . . . . . . . .[2720.1] {415.1}
Hot on left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[2722.2] {416.0}

Outdoors
ABS vents protected with latex paint . . . . . . . . . .[ASTM-D2661] {IS-5 313.3}
Vacuum breakers on all hose faucets . . . . . . . . . . . .[2902.3.3] {603.4.7}
Accessible stop & waste hose bibbs in cold climate . . .[2903.10] {n/a}
Vacuum breakers >6in. above highest sprinkler . .F-p13 [2902.2.2] {T6-2}
No valves downstream of vacuum breaker . . . . . . . . .[2902.4.3] {T6-2}

General
Potable water air gap of 2 pipe diameters or min. 1in. [T2902.2.1] {603.3.5}
Water supply valves for each fixture or appliance . . . .[2903.9.3] {605.5}
Traps seal min. 2in., max. 4in. . . . . . . . . . . . . . . . . . .[3201.2] {1005.0}
Backwater valve accessible . . . . . . . . . . . . . . . . . . . . .[3008.1] {710.6}
Rainwater drains not connected to building drain . . . . . . . .[n/a] {714.2}
AC, refrigeration & water softener drains min. 1in. airbreak [n/a] {801.1}
Fixtures shall be smooth, impervious, and free from concealed fouling areas
.......................................................................... . . . . . . . . . . . [2701.1] {401.1}
Joint between fixtures and walls {or floors} shall be sealed . . . . . . . . [2705.1] {408.2}
All fixtures (except toilets and urinals) must have drain strainers . .. [2702.1] {405.1}

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