Tru Design Vented Loop With Solenoid 38mm White 12v - 90464Designed and made in New Zealand, Tru Design Vented Loops with Solenoid are the superior composite siphon break solutions for marine applications. Vented Loops prevent water siphoning from underwater skin fittings back into a vessel and thereby guard against accidental flooding and sinking. These vented Loops are used predominantly in toilet to overboard applications, toilet inlet applications and holding tank to overboard applications. A Solenoid