Pentair Air Pressure Switch | ETi® 400 & UltraTemp ETi® Heaters | 475987 Pool Pole Accessories preserve integrity and keep hose

preserve integrity and keep hose folded for easy expansion

restoring a proper pressure-tight seal at the top of the filter tank

O-49 Diffuser O-Ring

Straight Adapter Inlet Size 1-1/2 in

Pentair Air Pressure Switch | ETi® 400 & UltraTemp ETi® Heaters | 475987 Pool Pole Accessories preserve integrity and keep hoseThe Pentair Air Pressure Switch (475987) is the OEM replacement pressure switch for the ETi 400 and UltraTemp ETi series pool and spa heaters. IMPORTANT: HEATER COMPONENT PROFESSIONAL SERVICE 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. The air pressure switch monitors airflow through