Description
You need a specific 4″ Reducer to 2.5″ mount designed for FRP (Fiberglass Reinforced Plastic) vessels. To connect a standard 2.5-inch control valve or head unit to a tank with a larger 4-inch top opening.
4″ Reducer to 2.5″ mount details
- Purpose: This adapter is a bushing that reduces the 4-inch vessel opening to the standard 2.5-inch size. Allowing for the installation of most standard control valves or multi-port valves (MPVs).
- Material: These reducers are typically made from durable, corrosion-resistant ABS plastic or similar high-grade plastic materials. To ensure longevity and a secure, leak-proof fit in water treatment applications.
- Threading: The adapter features a 4″-8 UN (Unified National) outer threads to fit into the tank opening and a 2.5″-8 NPSM inner threads to connect to the control valve.
- Compatibility: It allows compatibility with a wide range of common 2.5-inch control heads. From brands like Runxin, Fleck, Autotrol, and others, offering flexibility in system design.
- Riser Pipe: The reducer is designed to accommodate the standard 27mm (3/4″) riser pipe used with 2.5″ control heads, ensuring proper flow distribution within the tank.
4″ Reducer to 2.5″ mount








