Home E Support Overview E Propeller Bead® Filter Resources E Propeller Bead Filter Installation Assembly Propeller Bead Filter Installation Assembly Basic Layout PBF Plumbing Example Diagrams Pressurized plumbing configuration example using one 3-way valve. Standard External Plumbing Configuration Pressurized backwash configuration using two 1-way valves For detailed cut lists for external plumbing see Configuration. Head Assembly On large filters, the heads will ship in a wooden crate to be installed on site. Seal Replacement Directions See Documentation