Tankless Water Heater Gas Line Requirements

Drain and disconnect the old water heater.

Tankless water heater gas line requirements.

Ask your gas provider about the size of your gas main. For both gas and electric models a tankless water heater s overall energy efficiency is measured using an energy factor ef rating. Because tankless units heat water on demand they require higher btus or they operate on high heat. This valve should be connected to a tube that discharges no more than six inches above floor level so hot water won t scald anyone nearby.

Vent termination all tankless water heater vents must terminate at least 4 feet from a property line. The same appliance would require just a pipe size based on table 4 the 3 0 in w c. Plumbing the most important skill is needed for working with both gas and water lines installing fixtures and ensuring there are no potential leaks or pressure issues. Turn off the water gas supply valves and power.

This does not mean that a tankless water heater uses more gas. Ok so san jose has the following requirements for where to install the tankless water heater. Restrictions on gas fueled tankless water heaters no gas appliance may be located in a room used. You may have to run new larger gas pipe from your gas meter.

Electrical even gas water heaters have electrical parts and need to be hooked up to your breaker box. Tankless water heater pressure temperature relief valve safety requirements the temperature pressure relief valve lets water escape if the temperature or pressure is too high. This ef rating is based on test procedures developed by the u s. To heat the water quicker and more efficiently tankless water heaters operate with higher btus and require a minimum gas line.

Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models. The minimum gas line size is inside diameter. Pressure drop in table 2. Ideally to maintain the water temperature required by all of these functions at the same time your requirements are a tankless water heater that is capable of raising the temperature of the water.

Tankless water heaters usually need more gas than even the biggest home furnaces.