1-1/2″ Marelon Vented Loops, 903000

Description

This 1 1/2″ MF840 Marelon Vented Loop is made of black non-corrosive materials. Install inlet and discharge plumbing. Position so they remain approximately 8 inches above the waterline at any angle of heel or trim.  The one-way valve in the vent fitting allows air into the loop when a vacuum is present caused by a siphon condition and closes when under pressure.