Large lid of Ø400mm in transparent methacrylate 25mm thick Supplied with stainless steel VA4 gauge adaptor Supplied with stainless steel VA4 pressure gauge Screws and washers are in stainless steel VA4 Supplied with nickel plated brass anti-galling nuts Air release valve with a splash proof 6mm tube connection Extended filtration media bed height Large sand drain of 2”1/2 and water drain of 1”1/4 Supplied with water drain valve kit Filtration arm slots of 0,25mm Upper internal kit union for ease of maintenance Test pressure 3,75 bar Max operating pressure 2,50 bar Max water temp 60°C Salt & Ozone resistant white internal coating EN 16713 & UNI 10637:2024 Compliant; Supplied with selector valve; Warranty of 5 years.