O-ring, 42 x 3 – Viton, Part# 320333 – vacstellar

This O-ring is a direct replacement. It fits right into the groove. No cutting or gluing is needed. Just place it in position and assemble the parts .An O-ring creates a seal by being compressed. When you tighten the parts together, the O-ring gets squeezed in its groove. It fills up all the tiny gaps between the metal surfaces. The pressure inside the pump actually helps push the O-ring against the walls, making the seal even stronger. this Viton O-ring (Part #320333). Measuring 42 mm inside diameter by 3 mm thick, this O-ring creates a dependable seal between pump parts. Made from Viton, a high-performance material that resists heat, oil, and chemicals. Fits DUO35, DUO65, UNO35, UNO65, and related models .