Hayward HP50TA HeatPro Titanium 50,000 BTU Heat Pump, Square Acoustic compressor cover and profiled fan blade ensures quiet operation and efficient performance;Quiet backyard environment Ultra-Gold corrosion resistant evaporator fin for extreme durability Titanium heat exchanger designed for maximum heat transfer, efficiency and reliability Durable injection molded UV-resistant body panels that are impervious to rust and deterioration 2 x 2 1/2 inches CPVC union plumbing connections. NOTE: Refer user manual before use