dannye
Member
I am planning to convert to a gas stovetop (from electric), and so I started reviewing my gas system to make sure my piping is adequate to add this additional appliance. I need help in figuring out the effect of a regulator on my pipe sizing. All charts that I've seen for gas pipe sizing have grids for distance from the meter (and primary regulator) based on the inlet pressure and pressure drop. But how is the system affected by a secondary regulator?
In my system, I have a regulator (marked 1.87 psig = approx 52"wc, I believe) at the meter, then a 20ft run of 1/2 copper, then a secondary regulator marked 5.5"-12" wc. After the secondary regulator, the line T's twice - one line goes immediately into the furnace, one line goes 20ft with 1/2" copper to my water heater, and the last one is capped off -- and that's the one I would use for my stovetop if I can.
So - do I take my system measurements and sizing requirements from the meter or from the secondary regulator? If I take it from the secondary regulator, my sizing appears to be in good shape. If I take it from my meter, the charts indicate my main feed is significantly undersized. Thoughts?
In my system, I have a regulator (marked 1.87 psig = approx 52"wc, I believe) at the meter, then a 20ft run of 1/2 copper, then a secondary regulator marked 5.5"-12" wc. After the secondary regulator, the line T's twice - one line goes immediately into the furnace, one line goes 20ft with 1/2" copper to my water heater, and the last one is capped off -- and that's the one I would use for my stovetop if I can.
So - do I take my system measurements and sizing requirements from the meter or from the secondary regulator? If I take it from the secondary regulator, my sizing appears to be in good shape. If I take it from my meter, the charts indicate my main feed is significantly undersized. Thoughts?