Hayward H-Series Header O-Ring Kit - FDXLFOR1930 Hayward ED2 Parts What is the Difference between

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Hayward H-Series Header O-Ring Kit - FDXLFOR1930 Hayward ED2 Parts What is the Difference betweenProduct Description Hayward H Series Replacement Header O Ring Kit for ALL Models. Hayward Item Code: FDXLFOR1930 Features Genuine Hayward H Series Replacement Header O Ring Kit. Compatible with ALL Hayward Forced Draft Heaters: H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP, H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, and H400FDP. Compatible with ALL Hayward H Series A G H135 Heaters: H135ID1, and H135IDP1. All service on gas appliances shall