Radiator Hose Tees

Why You Might Need Tees. If you are doing an engine swap, and want to run a pressurized expansion tank, Radiator Hose Tees like the ones pictured can help. Or, if you are using an engine that has only one heater hose fitting and a radiator that does not have a fitting for a heater hose, a hose Tee can be used in the lower radiator hose for the heater hose return line. (NOTE: When using the tee for a heater hose, do not install the Tee into the upper radiator hose, which puts the coolant will go through the radiator, bypassing the thermostat, thus preventing the engine from warming up.) And if you have had a plastic or nylon hose tee fail, never fear: these brass or aluminum tees will prevent future failures. More About Our Tees. We make our tees out of cnc-machined aluminum. For example, a 5/8" x 1/4" tee is an aluminum part with a 1/8 npt thread, and a 1/4" x 1/8 npt brass tube fitting is screwed into the aluminum, similar to the LS1 Steam Vent Tee, #LS1-tee but with only one fittin