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Just add to water
Proprietary zipper enclosure leaves
Pentair produces closure kits in multiple sizes — confirm the thread diameter on your existing closure or in your filter's installation manual before ordering
Verify your heater's manufacture date and wiring configuration before ordering
The collar sits over this area and can mask developing fractures — catching them now avoids a more involved repair later
Pentair AGS 150 Degree F | ETi 250 / ETi® 400 Heater | 475985 Lifeguard & Rescue Equipment Just add to waterThe Pentair AGS 150 Degree F (475985) is the OEM replacement 150F automatic gas shut off sensor for the Pentair ETi series pool and spa heaters. IMPORTANT: LICENSED PROFESSIONAL INSTALLATION REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high voltage components without proper certification. This automatic gas shut off (AGS) switch monitors
