Triton II TR140 Swimming Pool Filterbr Click below to buy on Amazon: br Heavy-duty closure provides easy inspection and features an easy-to-read pressure gauge with air relief valve br Swing-away diffuser allows instant access to sand and all internal parts br All internal parts are threaded for ease of service br Internal air bleed br Bulkhead connectors are threaded for easy installation and service br Combination sand and water drain makes servicing and winterizing fast and easy