Flusso 145.4511T Trim For Volume ControlTO BE USED WITH THE TVH. 4511 OR TVH. 4371 VALVE Handle Operation The handle of the *4511 trim set is used to control volume of water flowing through the valve. It can be used to set the water to a trickle all the way to full volume flow. Valve Installation This trim is paired with the TVH. 4511 or the TVH. 4371 valve. As the valve is installed, care should be taken to maintain proper distance from the back of the valve to the surface of finished tile