Pentair Water Bypass Assembly | ETi® 400 Heater | 475621 Trichloride The Pentair Center Core (59053800)

The Pentair Center Core (59053800) is the OEM replacement structural core for Pentair Clean & Clear

Replace both components together to avoid reopening the connection a second time

Filters produced before that date require a different assembly

A damaged or deteriorated flameholder can result in ignition failure

The volute is the wet-end housing that surrounds the impeller and directs water flow from the pump inlet through to the discharge port

Pentair Water Bypass Assembly | ETi® 400 Heater | 475621 Trichloride The Pentair Center Core (59053800)The Pentair Water Bypass Assembly (475621) is the OEM replacement bypass assembly for the Pentair ETi 400 Heater, restoring proper water flow regulation within the heater's internal plumbing circuit. 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