WILDEN 25 mm SD Equalizer:

The SD Equalizer® was designed to remove pressure variation on the discharge of the pump. It has a flow-through design manufactured with existing Wilden pump parts. The SD series automatically sets and maintains the correct air pressure required optimizing its effectiveness.

Materials of Construction, Wetted Housing
Materials Availabilty: Aluminum, Stainless Steel, Cast Iron, Polypropylene

Materials of Construction, Air Components
Materials Availabilty:
Air Regulator Body: Polypropylene, Aluminum, Nickel-Plated Aluminum, Stainless Steel
Air Chamber: Mild Steel,Teflon®-Coated Mild Steel, Aluminum, Nickel-Plated Aluminum, Stainless Steel