Hayward Universal H-Series Natural Gas Pool Heater, 135,000 BTU, Low NOx | W3H135FDN Lasco Fittings or outdated grate can restrict

or outdated grate can restrict flow or compromise protection at the suction point

or shutdown

Designed for use with the Linear Vector 74 model

Pentair IntelliCenter systems are widely used for advanced pool automation

Hayward Universal H-Series Natural Gas Pool Heater, 135,000 BTU, Low NOx | W3H135FDN Lasco Fittings or outdated grate can restrictHayward W3H135FDN Universal H Series Natural Gas Pool Heater 135,000 BTU Low NOx The Hayward Universal H Series W3H135FDN is a 135,000 BTU natural gas pool heater engineered for efficient, reliable heating of residential in ground pools and spas. Designed with industry leading hydraulic performance and energy efficiency, this heater delivers fast heat up times while helping reduce circulation pump run time. Built with a corrosion resistant Cupro