The Cash Acme Tank Booster combines a Thermostatic Mixing Valve (TMV), a Flexible Connector and a Water Heater Tee in one package and can effectively double a households hot water heater capacity while delivering hot water at safe temperatures in residential/commercial applications. Available in regular and PRO models, both versions of the TMV are factory set at 120 degree Fahrenheit (49 degree Celsius), but may be easily adjusted and can be used with Shark Bite Flexible Water Heater Connectors and Ball Valves for easy installation in systems using copper, CPVC or PEX tubing, no need for additional transition fittings.