The Replacement StaRite 18201-0200 2" Side Mount Multiport Valve Kit with Union Nuts is designed to work specifically with the StaRite System 3 Filter Model S8S70, ensuring optimal performance and compatibility. This kit is an excellent replacement option for pool owners who want to upgrade their plumbing system or replace a damaged valve. With its six-position design and durable ABS construction, this valve kit allows for effortless switching between different functions such as filtering, backwashing, rinsing, and more. The kit also comes with union nuts for easy installation and maintenance, making it a convenient and practical choice for pool owners. Choose the Replacement StaRite 18201-0200 2" Side Mount Multiport Valve Kit with Union Nuts to keep your pool's plumbing system running smoothly.