The Pro water bypass fittings increase engine performance by diverting water from the cylinder head to the bypass fitting, rather than forcing all of the water thru the exhaust system, thus drying out the exhaust.

Fits a 3/8" inner diameter water line and requires a 1/2" mounting hole drilled thru the hull. If you are unsure if this is the correct size, then measure the inner diameter of the waterline! 

Jetski Waverunner 45-degree 3/8" water bypass pisser