2.5" to 4" Multiport Valve Adapter (For FRP Vessels)

The 2.5 inch to 4 inch Multiport Valve Adapter is a specially designed connector used to install standard 2.5" multiport valves onto larger FRP vessels with 4" top openings . In most standard filter vessels (up to 13×54), multiport valves fit directly. However, for larger vessels like 14×65, 16×65, and above , the opening size increases to 4 inches. This adapter bridges that gap, allowing seamless installation without changing the valve. Built with precision threading and a sealing O-ring, it ensures a secure, leak-proof connection for reliable operation. 🫗 Quick Highlights Converts 2.5" valve connection to 4" vessel opening Required for 14×65, 16×65 & larger FRP vessels Compatible with top mount multiport valves Threaded design with O-ring sealing Ensures leak-proof and secure fitting Strong, durable construction Sold on ARYA ION (https://aryaion.com/products/2-5-to-4-multiport-valve-adapter-for-frp-vessels). The price shown is the retail price on that storefront on 2026-10-23, not a GreenB2B quote or a wholesale price.