Vented Loop Solenoid Valve for 37010 Series ToiletWhen installing a vented loop in the inlet hose, it is recommended that a Vented Loop Solenoid Valve (37068-2000) is connected to the vent air inlet to ensure maximum electric toilet performance and prime-ability. Connect the brass port of the valve (remove plastic filter, if installed) with the air inlet of the vented loop. Wire the solenoid valve in parallel with the toilet motor by connecting one side of the solenoid to the toilet flush switch and the other side to battery ground.This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.