2" Side Mount Multi-Port Valve with Unions for DEV and JS Series Filters are designed for versatility with 6 different positions. Multiport Valves are constructed of molded ABS for unsurpassed water clarity choose Jandy Diatomaceous Earth filters. Jandy DEV filters give you extra large capacity for extended cleaning cycles. Our easy-grip tank handles make installation and cleaning easy. One-of-a-kind pressure gauge/air release valve with built-in Clean/Dirty indicator accurately tells you when the filter requires cleaning. We offer a choice of 48 and 60 square foot capacity models.erial with durable plastic handles. They are available in 6 position versions to fit both the Jandy Pro Series DEV and JS Sand Filters.