Zodiac Jandy Pro Series JXi Flue Sensor Kit (R0719400) lochinvar A check valve is useful

A check valve is useful because it helps prevent backflow

The 27515-154-100 is a practical service part when a compatible top-mount multiport valve needs a lid assembly to restore dependable operation

This part is a useful choice when restoring cleaning performance

Useful for service repairs when the original cleaner part is worn or damaged

Designed for compatibility with spa systems

Zodiac Jandy Pro Series JXi Flue Sensor Kit (R0719400) lochinvar A check valve is usefulThe JXi flue sensor kit monitors exhaust related conditions in compatible Jandy JXi heaters and helps the control system protect the appliance during operation. A failing sensor may contribute to fault codes, lockouts, or unreliable heating even when the burner and gas train appear normal. Replacing the correct sensor kit supports safer heater operation and more accurate diagnostic response. Use R0719400 only after confirming the JXi model and service