BrassCraft PSC1107 K5 Safety PLUS Gas Installation Kit for Range, Furnace & Boiler Fits all current and most older gas ranges, boilers and furnaces Safety+PLUS Excess Flow Valve helps protect against gas fires and explosions - 3/4 In. MIP connection to gas supply or gas ball valve Approved for indoor and outdoor use. 100% Leak Tested Use with natural, manufactured, mixed and liquefied petroleum (LP or propane) gases and LP gas-air mixtures CSA certified. Designed, machined & assembled in the USA