I'm upgrading my gas line in my house to 1 1/2" to meet demand of a gas range, gas hot water, furnace. I figured that I needed inch and a half by taking the total load and the longest run and coming up with 185 cubic feet per hour. I'm upgrading from one inch now because I'm adding the gas range now and want a tankless water heater later, which will increase my demand to 445 cfh. If I run inch and a half all the way except for the meter, which comes out of the ground as 5/8ths goes through the regulator to 3/4, through the meter as 3/4, and then maybe a foot or two as 3/4 then hits my inch and a half, do I still get the supply I'm looking for? Right now I have a 250 a c meter, I know that when I add the tankless water heater, I'll need a meter upgrade.

You can n ot get more volume out of a pipe then you put into it. If your supply's choked down to 5/8ths. Of a inch at the source how will increasing the pipe size afterwards increase the volume?
I could increase the pipe size to 4 inches but it wouldn't increase the volume if the feed were only 5/8th, inch. Want more volime? Increase the meter size and don't reduce the pipe size from there.
Good luck, Tom

Hey tom, it was my understanding that pipe size was how we figured cubic feet per hour, that even though there is a small amount of 3/4, the majority is 1½ and with the regulator maintaining 6in WC, from an 8psi supply all was good, I mean, what, does everyone that puts in a pool has to dig up the street to get 1½ all the way into the house?

The operating phase iis
the meter, which comes out of the ground as 5/8ths
You just can't get more volume out of the end of a pipe then you put into it to start with.
Think like this, 5/8ths feed to a 1 1/2 long pipe. Think of all the space in that 1 1/2 as storage space, kind of like a pressure tank.
You now have volume stored in the larger pipe. (This is when you stop figuring) But wait! You're making massive draws at the same time. When you exhaust the volume built up in the 1 1/2 you're left bwith a 5'8ths opening to supply your house. It's all going to depend on your usage.
Do I think you're going to be OK increasing to 1 1/2? Yes I do! Do I think increasing to 1 1/2 without increasing the 5/6 ths feed will give you more volume? No I don't! Have you followed what I'm trying to say? ( and not saying it too well! Cheers, Tom

Thanks, that does answer my question; I will be OK,and when I add my tankless hot water heater and my demand goes way up, I can call the gas co and tell them to upgrade their part, thanks