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Apr 16, 2026 - 11:00 AM
These hayward union nut are compatible with Hayward H150, H200, H210, H250, H300, H350, and H400 Millivolt/Electronic Ignition pool and spa/hot tub heaters. Ensuring compatibility with these models means you can confidently replace or install parts without worrying about fitment, which saves time and hassle during maintenance.
