Zodiac Laars HI-E2 Combustion Air Filter (R0308000) aosmith A valve like this is

A valve like this is useful because it gives the user a single point for directing water flow through key filter functions

When a heater-side connection point begins to weaken

or equipment updates where a trusted Hayward skimmer body is needed

Polaris/Zodiac replacement part 9-100-3007

Zodiac Laars HI-E2 Combustion Air Filter (R0308000) aosmith A valve like this isWhen a compatible system needs component level repair, Zodiac Laars HI E2 Combustion Air Filter (R0308000) gives technicians a direct replacement option for pool and spa heater service. Because small heater, valve, and cleaner parts can look similar across model families, this item is best used when the part number has been confirmed. It helps keep debris from entering the combustion air path, supporting cleaner airflow and more stable heater