This is 3/4 '' Pipe specified Pipe size, real dimensions are 16 mm ID x 20 mm eye -LRB- 0.625 '' ID x 0.787 '' eye -RRB-, the smoothen privileged gives it the flow characteristics synonymous to past 3/4 '' specified pipes. Comes with 2 fittings, the fittings are someone 3/4 '' NPT on both ends. The KIT arrives with the brass connectors hand tightened, they are but not tightened or restored. This so that before fixing them to the present network, you can remove them, apply a slight pipe dope sealant on the tapering threads, and affix the rib part to the extant gas network -LRB- no pipe dope obligatory on the pivot nut or threads -RRB-, ... then reconnect the pipe and dependable pixilated the pivot nut. Not the connectors tightened also makes sense though as depending on your application you can feed the hose through 1/2 '' holes through walls, etc. and once in place, then apply the connectors -LRB- which are titanic nuts -RRB-. remote : gasFlex recommends that whenever the pipe is installed remote where it can be exposed to take sunlight, it shall be muffled with conduit to prevent free burning exposure. Inside Installation : Whenever the pipe is installed interior the building, it can be exposed to interior lightness, or it can also be enclosed in existent, or behind the wall in juiceless wall systems as requisite. resistance Installation The out PE layer in gasFlex a shield that makes it defiant against dot, alkaline or salt soil and alloys the system to be buried resistance. : 220,000 BTUH FOR LPG GAS APPLIANCES CAPACITY : 200,000 BTUH FOR innate GAS APPLIANCES .