Seven-Position Top-Mount Multiport Valve for above-ground filters - Compatibility: Designed to fit any Pro- or VL-series above-ground sand filter, providing seven positions for precise control of your filtration system. - Clear water monitoring: Built-in sight glass lets you easily observe water clarity and know exactly when the backwash cycle has completed for optimal cleaning results. - Durable construction: Made with robust stainless steel and ABS components for long-lasting performance in demanding pool environments. - Easy operation: Lever handle enables smooth and effortless switching between valve positions, making maintenance and daily use straightforward. - Key benefits: Reliable backwashing and filtration control, quick visual verification of cycle progress, durable materials for extended service life, and simple handling with a single lever. - Use scenarios: 1) Routine backwash to clean the sand bed and restore flow in an above-ground Pro- or VL-series filter. 2) Rinse or recirculate/waste operations during maintenance or testing to fine-tune filtration or remove trapped debris. 3) Seasonal shutdown or service with a dedicated closed position for safe, quick stabilization. - Performance attributes: Seven-position versatility, top-mount design for easy access, and durable stainless steel/ABS construction to support long-term pool filtration needs.