For use with our fresh water tanks equipped with 1-1/2" FPT fittings. Just screw the 1-1/2" MPT end into the tank and then attach either a 1-1/4" or 1-1/2" diameter clear vinyl or green corrugated hose. A little silicone caulk on the barbs will act as pipe dope for corrugated hose.
A hose clamp finishes the job.
No thread tape is needed when screwing plastic fittings into polyethylene tanks. Just go one turn past hand tight.