Hayward Universal H-Series Natural Gas Pool Heater, 150,000 BTU, Low NOx | W3H150FDN Outdoor Decor If your 407A heater begins

If your 407A heater begins the startup sequence but stops before ignition

flow drops

the commitment to consistent quality makes Waterway a dependable choice for professional applications

Replacement or maintenance context: Used during TA titration as the indicator to determine the titration endpoint

Compact & Lightweight: Measures 6 x 4 x 6 inches and weighs just 2

Hayward Universal H-Series Natural Gas Pool Heater, 150,000 BTU, Low NOx | W3H150FDN Outdoor Decor If your 407A heater beginsHayward W3H150FDN Universal H Series Natural Gas Pool Heater 150,000 BTU Low NOx The Hayward Universal H Series W3H150FDN delivers dependable pool heating with a 150,000 BTU natural gas output designed for residential in ground pools and spa systems. Engineered for efficient heat transfer and reduced operating costs, this heater provides rapid temperature increases while maintaining reliable performance. The heater features a Cupro Nickel heat