This video is a proper way to start a Hayward gas heater for the first time and or to shut the heater down for the season | By Atlantis Pools | Okay,
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Amazon.com: 1.5" Threaded Pool Spa Return Winterizing Plug, Filter Drain Plug SP1022C with O-Ring for Most Hayward Pentair Pool Filters(5PCS) : Patio, Lawn & Garden
![Hayward Universal H-Series Heater, Low NOx, 400,000 BTU, Natural Gas, Cupro-Nickel Heat Exchanger - W3H400FDN - INYOPools.com Hayward Universal H-Series Heater, Low NOx, 400,000 BTU, Natural Gas, Cupro-Nickel Heat Exchanger - W3H400FDN - INYOPools.com](https://images.inyopools.com/cloud/images/hayward-h400fdn-02.jpeg?format=jpg&scale=both&anchor=middlecenter&autorotate=true&mode=pad&width=650&height=650)