Jandy SVLV8 2" Side Valve, 8" Center to Center with Pre-Plumbed Universal Union Kit designed for maximum performance and reliability, the Jandy® Pro Slide Backwash Valve is constructed of durable CPVC thermoplastic. The Jandy® Pro Slide Backwash Valve is a 2-position backwash valve for use with the Jandy® Pro DEV and JS Sand Filters. It is designed For maximum perFormance and reliability. The Jandy® Pro Slide Backwash Valve provides simple, efficient backwashing of D.E. or sand filters with no risk of dead-heading.