This is a replacement diaphragm, 4 insert check valves and a replacement washer that fits Superior windmills. We use a high-quality diaphragm manufactured by Garlock, the same as an original. Guaranteed to work or your money back!
We also manufacture replacement compressors that produce 3x more air with a full 5 year warranty that will fit right on your existing windmill. You can see them here.
*Outdoor Water Solutions, Inc. is not associated with the owner of this trademark.