Flusso 145.2691 Wall Mount Tub Filler With Hand ShowerThe TVH. 2691 Thermostatic valve features NPT female connections and has 2 water outputs [ports] (one for the tub spout and one for the handheld). Both water outputs are operable simultaneously, i. e both at the same time, or one at a time. The middle handle sets the temperature. The left handle controls output port 1 and the right handle controls output port 2. Each port has full volume control capability. The installation of the spout and handheld