Koenders Windmill Replacement Parts Biofilter and other recreational uses are

and other recreational uses are approved during and following the use of this product

5” FNPT inlet and 1

The nominal wall thickness is between 3/16” and 1/4” making a nice sturdy tank

and one 7" aluminum oxide air stone with check valve

180 Blue 124 0

Koenders Windmill Replacement Parts Biofilter and other recreational uses areReplacement parts for your existing Koenders Windmill Windmills that were purchased before the year 2000 will be a generation 1 unit, and require "old style" parts. Any unit purchased after the year 2000 will be a Generation 2 or newer. Most parts are interchangeable for single and double diaphragm units, though double diaphragm units require the 26" blades and 2 diaphragm repair kits.