Stanbroil LP Propane Gas Fire Pit 1/2" Air Mixture Valve - High Capacity 150K BTU Stainless Steel Rated BTU's: 150,000 Max All fittings are 1/2 inch NPT male threads,1/2" Female or Male (with included adapter) NPT on Burner Side and 1/2" Male NPT on Incoming Side For propane (LP) only, Improves Propane burn efficency Results in higher quality flame appearance Reduces sooting normally associated with Propane