Chapter 1301 of the Texas Occupations Code (The Plumbing License Law) lists specific plumbing fixtures, including water heaters that are required to have a plumbing permit issued prior to installation. (1301.551) In addition, this law states that installations and plumbing work be done in accordance to current codes by a licensed plumber, registered with the Texas State Board of Plumbing Examiners. This work must also be inspected by a licensed plumbing inspector (1301.255) of that municipality.
Plano, Texas Water Heater Installation Requirements:
Effective July 1, 2008, the City of Plano adopted 2006 IPC and Fuel Gas Code, which requires a sediment trap on gas fixtures including the water heater
1. Location Access and Working Space (not shown) – Shall be installed in accordance with Section M1305 and shall be located and connected to provide access for observation, maintenance, servicing and replacement. Working space: 30 inches x 30 inches.
2. 18 inch stand – Required when water heater is installed in a garage. Water heaters listed as flammable vapor resistant and for installation without elevation and electric water heaters are not required to be elevated in the garage.
3. Corrosion Resistance Pan – Required for installation above 1st floor. Corrosive resistant ¾ inch drain line required to discharge at a visible location: exterior above grade, floor sink, mop sink. T&P line may NOT drain to Pan.
4. Shutoff Valve – A shutoff valve is required on the cold water supply and is readily accessible. Dielectric unions not required for hot and cold lines.
5. Pipe Insulation – Pipe insulation is required on first 5 feet of hot and cold water pipe and to within 6 inches of draft hood.
6. Temperature & Pressure (T&P) Relief – A temperature and pressure relief valve is required. ¾ inch minimum drain line must run with fall to approved locations: Exterior of building and located between 6 and 24 inches above finished grade, floor sink, or mop sink.
7. Combustion Air (Gas Water Heaters Only – not shown) – Where located in a confined space (less than 50 cubic feet of area for each 1000 BTU input rating of water heater) a high and low combustion air opening must be provided within 12 inches of the top and bottom of the enclosure.
8. Vent (Gas Water Heaters Only – Ref. footnote for G2428.2.3 of IRC) A double wall (type B) vent must be provided with a min. 1 inch to combustibles. Min. 5 feet vertical required between vent collar and vent cap. Vent may have offsets of up to 45 degrees and one offset of up to 60 degrees. Vent must terminate in a listed vent cap. Vent stack minimum 5 feet.
9. Vent Connector (Gas Water Heaters Only) – Single wall vent connector allowed to connect water heater to its vent. Vent connector must be exposed and cannot run into or through concealed construction. Minimum 6 inch clearance to combustibles. Min. pitch ¼ inch per foot.
10. Gas Connector (Gas Water Heaters Only) – Accessible and approved valve with maximum 3 feet of flex connector. Connector and valve must not be concealed.
11. Tank-less Water Heaters (not shown) – Follow manufacturer installation instructions & comply with Int’l Fuel Gas Code for gas line size & vent. A gas load calculation shall be provided on the jobsite when
Notes for ELECTRIC water heaters:
1. Dielectric unions not required.
2. Flex connection not required for hot and cold lines. Copper pipes acceptable.
3. Item (3): Drain pan is not required if water heater is on the 1st floor.
City of Plano Building Inspections Department
1520 Ave K, Suite 140
Plano, TX 75074