1"
Posted by jimbo on March 23, 2004 at 08:21:36:
In response to 1"
: If you starve that unit for gas, you will be very disappointed in it's performance. Half inch pipe is ruled out completely; 3/4 is on the edge depending on the exact conditions at your location. I'm sure if you contact the manufacturer of your unit they would recommend one inch.

You probably spent a grand to purchase the unit and god only knows what the installation is costing; why scrimp to save $20 on small pipe, a decision that may affect the performance of your unit for 15 years.

A professional plumber can perform the exact calculations at your house to give you the exact answer.


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