6 position multi-port 1.5” valve; Flange clamp design permits 360˚ rotation for easy installation; Top diffuser provides even water distribution over media; Internal piping of 1.5” (50mm) diameter ensures free-flowing performance; HPDE tank construction for long-lasting durability; Maximum working pressure: 3,5 bars / 50 PSI; Bottom drain for easy winterization and maintenance; sturdy 19″ base