For your regulator. Use the 11" wc. Same low pressure on found on grills. I'm using 1/2" pipe but frankly 3/8" is fine too, I've seen setups with 1/4" with high pressure burners with no issue. For your orifice size, you need 3/32" for a good balance of Btu and efficiency.
Last edited by bobbafett; 08-23-2012 at 11:34 AM.