This unique method locks in fiberglass, preventing fibers from "blooming" under harsh conditions. Heavy-duty closure provides easy inspection. Easy-to-read pressure gauge with air relief valve. Instant access to sand and all internal parts. Internal air bleed automatically prevents unwanted air pockets.
Combination sand and water drain makes servicing and winterizing fast and easy. Note: Operating limits-Maximum continual operating pressure of 50 psi. Maximum operating water temperature (internal filter) 104° F (40° C).