CX900DA Pool Filter Knob — compatible replacement for Star Clear Plus cartridge filter systems C751, C900, and C1200. Designed for medium-sized pools and built for outdoor use. Why you need it Restores smooth, reliable operation to your filter valve so filtration cycles run correctly. Prevents misalignment and hard-to-turn controls that can reduce filtration efficiency or cause downtime. Provides a direct replacement that fits original Star Clear Plus assemblies for a secure, trouble-free swap. Key benefits Reliable filtration: Replaces worn or damaged knobs to ensure proper valve positioning and steady cycle performance. Easy installation: Designed to match the C751, C900, and C1200 assemblies for a straightforward, secure replacement without modification. Durable for outdoor use: Constructed to withstand poolside conditions so it performs consistently season after season. Maintains water quality: By restoring proper control of your filter, it helps the system remove debris and keep water clear and healthy. Function and compatibility Function: Replaces the user-control knob on Star Clear Plus cartridge filters to restore smooth turning and accurate valve alignment. Compatibility: Specifically fits Star Clear Plus cartridge filter models C751, C900, and C1200. Size/application: Intended for medium-sized residential pools where these filter models are used. Build: Durable construction suitable for outdoor pool environments; engineered to retain performance under regular use. Practical use scenarios Routine maintenance: Swap in a new knob when the original becomes cracked, loose, or difficult to turn to keep filtration operating reliably. Preventive upgrade: Replace aging knobs during a scheduled service to avoid unexpected downtime at peak season. Property management/installed pools: Quick, dependable part for rental properties or pool service work where fast, secure fixes minimize time out of service. What it solves Eliminates sticking or broken knobs that interfere with filter settings. Restores accurate valve alignment to protect filtration cycles and system performance. Reduces the chance of extended downtime by providing a compatible, durable spare part. Compatible with Star Clear Plus cartridge assemblies C751, C900, and C1200. Ideal for medium-sized pools that require dependable, easy-to-install replacement parts.