Replacement tower cone for OWS 3-leg large windmill towers. The cone is the transition piece at the tower top that carries the pivot tube; replace it if yours is damaged or lost in a rebuild.

Tower cone bushings for OWS windmill aerators and large yard windmills — the wear part between cone and pivot tube.

Self-cleaning EPDM rubber membrane diffuser on an integrated self-sinking base — no gravel, no added weights, just connect and drop. The membrane sheds buildup that clogs stone diffusers, keeping bubble output (and oxygen transfer) consistent with...

Drop-in 12" rubber membrane replacement for worn or aging diffuser discs. The low-PSI opening design releases maximum air without straining the windmill or pump, and the precision-slotted membrane resists clogging season after season.

The simple, budget-right diffuser for windmill and small-pond aeration: a self-sinking airstone that throws thousands of fine bubbles, with a foot valve for one-way airflow. No anchoring hardware or tools needed. Choose a single, or the double pack with...