*Product May Be Subject To Extended Lead Times. The UltraZap Brush Pre-Filter is an inline filtration unit designed to intercept coarse debris before it reaches your main filter system. Featuring a durable housing with 50mm inlet and outlet connections, it accommodates a removable brush (sold separately) that captures solid waste, reducing the load on subsequent filters. Its design allows for both vertical and horizontal installation, offering flexibility to suit various pond setups.​