Check the listing for details. Flow-Rite V3 - 3 Position Automatic Valve, Rear Cable Approach MPV-03-RN01. Condition: New. Listed at 46.59 USD. Like the V2, the V3 is a reversible check valve that allows a single pump to not only perform the basic livewell functions necessary to keep your catch alive, but does it in a passive or automatic manner. It also has a third closed "RECIRC" position. When the first fish is caught, place the valve in the "AUTO" position and turn on the pump. When the boat is off plane the pump will recirculate and aerate the livewell water and simultaneously blend in a portion of fresh lake water. Used livewell water is expelled out the overflow as fresh water enters to prevent any ammonia build up. When the boat is put on plane, the valve's check flapper will prevent water loss out the drain, and allow the pump to continue its recirculation duties.