Three Sided Male Union Tube Sae 45 degree Flare fittings are commonly used in propane, hvac, and natural gas connections. Also can be used for gasoline, fuel and oil systems. These fittings are available in equal and reducer sizes. Allows for reliable connections of three flared pipes. A quick and easy way to split or divert gas flare connections. Can be used for instrumentation installation of gauges, sensors and probes.