Water Heater Gas Line Size

You will never get more gas through the 3 4 pipe than will pass thorough the 1 2 nipple.

Water heater gas line size.

For instance if a 1 inch pipe runs 30 then drops to 1 2 for 6 and then someone installed 3 4 pipe and ran an additional 40 feet the 40 feet of 3 4 pipe would all be considered 1 2. The longest length method or the branch length method. What size gas line does a rinnai tankless water heater require. Most gas bills measure gas in therms or decatherms.

2 stoves 1 hot water heater 1 furance 1 dryer and 1 gas space heater heating room in garage this line is run underground out to my garage and approx 100 ft away. The gas line must be sized 1 3 larger to compensate for elevation. Branch 1 e tankless water heater 199 900 20 ft 1 g gas furnace 75 000 15 ft d branch main line 274 900 30 ft 1 branch 2 j gas dryer 25 000 20 ft h gas range 55 000 30 ft k gas logs 40 000 10 ft b c branch main line 120 000 45 ft main trunk a main trunk line 394 900 20 ft 1. A therm is 100 000 btus of heat.

There are two methods for determining the required pipe size. The gas line size will depend on btu rating of the water heater the other gas appliances and where they are installed on each branch from the meter and regulator.