Tankless Water Heater Gas Supply Line Size

The right size is a tankless water heater that can heat enough gallons of water to a specific temperature per minute to keep up with the demand.

Tankless water heater gas supply line size.

In all cases a near 200 000 btu gas appliance will require a minimum of a inch gas supply line. Tables 2 and 3 provide the capacity by pipe size and length based on the maximum allowable pressure drops. Gallons per minute gpm is the key when it comes to sizing tankless water heaters. Rinnai tankless water heaters are designed to provide maximum performance and efficiency using either a 3 4 or 1 2 gas line as long as sufficient gas flow is available.

Water heaters located in the garage may terminate on the garage floor with the same distance requirements cpc 505 6 cpc 505 4 508 5 608 5 t p does not discharge into a water heater drain pan. If you want to upgrade your water heater size from 40 or 50 gallons storage water heater or replace it you won t necessarily need a big tankless water heater. Like a hot water tank for 5 people will require at least a 60 gallon tank. Since tankless water heaters supply endless hot water you don t have to worry about capacity but instead think in terms of water flow rate.