Drain Pan – Drain pans (1½” deep) will be required for any replaced water heater. If the pan can be drained to the outside of a building, a ¾” drain line must be installed that drains to the outside of the building.
If there is no way to drain the pan to the outside of the building, you must install a boiler drain with hose bibb threads in the pan. This will allow the occupant to connect a water hose and drain any water accumulating in the pan if a leak occurs. In addition to the boiler drain, you must install a Wags valve or flood stop valve.
T&P Line – the T&P line must discharge outside of the building between six inches (6”) and twenty-four inches (24”) above the ground with a ninety degree (90°) on the end of the pipe with the outlet facing the ground.
Flue Vent – Flue vents must have Minimum 1 Inch clearance from any combustible material. Double wall (Type B) vents must be used for any vents that extend through an attic. Single wall vents may only be used in spaces that are not concealed and to a point six inches (6”) below the ceiling that divides the room (or closet) from the concealed space or attic.
Flex Line – New gas flex line required. The maximum length of a gas flex line is thirty-six inches (36”) and the minimum diameter is one-half inch (½”). An approved gas valve must be installed immediately prior to the flex line.
Sediment Trap – Sediment trap for gas line is required.
NOTE: It is the plumber’s responsibility to have the water heater inspected immediately after installation. Failure to receive inspection approval of the water heater immediately after installation could result in the filing of a complaint with the Texas State Board of Plumbing Examiners and the issuance of citations.