I need to know if my propne supply line is large enough. I have a tankless water heater and a greenhouse heater together burning 185,000 btu’s. My supply line is 5/8″ semirigid copper running 150′ from the tank. I also would like to someday add a stove top to this line. Is it adequate and safe?
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Replies
A quick look at the CodeCheck table says probably not. The table is for natural gas, but it recommends a 1" line at 160,000 BTU and 150 foot length. That's for gas delivering 1100 BTU/cu. ft. How many BTU/cu. ft. is your propane? I know it's typically more than NG, but your 5/8" line sounds to be about half the necessary size.
If this is set up with a second stage regulator it should work. First reg set at 5 lbs. and second set to about 14"WC. Talk to your propane supplier, or a plumber who does this.
KK
Is the first regulator at the tank, meaning higher pressure in the line to the house, and then the second regulator controls only the lines in the house?
David,
Yes.
KK