SHARKBITE/CASH ACME SB-25376 3/4 Temperature Gauge Accessory 3/4" model for on the mixed water outlet of the Tank Booster and Tank Booster Pro 1" model for use on the mixed water outlet of the HG110D LF, HG110HX LF, or HG160 LF series of Thermostatic Mixing Valves to monitor the mixed water outlet temperature Measures the mixed water outlet temperature from a Heatguard Thermostatic Mixing Valve. 3/4 Tank Booster Pro Temp Gauge