Details: The technologically advanced and user-friendly zodiac legacy heater is an excellent gas heater. This electronic ignition model of legacy heater is energy-efficient and has economical pool heating solution. This polymer header heater contains natural gas. Its copper heat exchanger and flo-thru baffles provide efficient heat transfer and lower the amount of energy needed to heat your pool. Feature includes digital control of pool and spa set-points, self diagnostics and communication to AquaLink RS system and it also has cpvc 0.8-inch universal union connections.