Lochinvar Air Pressure Switch [w/ Mounting Nuts] (100166258) aquasun A filter cartridge helps the

A filter cartridge helps the system continue removing suspended debris before water returns to the pool or spa

Supports high-flow performance

this wet end helps restore more dependable pump-side performance and supports a cleaner

supporting cleaner operation and reducing the chance of leakage through the control plate area

When a DE grid becomes damaged or worn

Lochinvar Air Pressure Switch [w/ Mounting Nuts] (100166258) aquasun A filter cartridge helps theThe Lochinvar air pressure switch is designed for compatible heater applications where pressure based airflow monitoring is needed. An air pressure switch is useful because it helps verify proper operating conditions, supporting safer and more dependable heater performance during operation. This replacement is especially useful when the original switch is failing, inaccurate, damaged, or no longer activating correctly. Including mounting nuts helps