This is a replacement Hayward Pressure Switch Adapter for H-Series Induced Draft, Low Nox Induced Draft, Electronic ED2 Style, Millivolt/Electronic ED1 Style Heaters, H250IDL2/H350IDL2/H400IDL2 Pool and Spa/Hot Tub Heaters and H150/H200/H210/H250/H300/H350/H400 Millivolt/Electronic Ignition Pool and Spa/Hot Tub Heaters.








