Are the original beehives suppose to have a spring on the bottom? ( under the oil filter) ?
The one in mine is 7/8" round and 15/16"tall.

The closest filter I can find to fit is a Pure L20701.
It is 4" tall and requires two gaskets, with the top and bottom spring inside.

http://i1069.photobucket.com/albums/u462/52Stove/Beehive_A4_OutletPatPend_zps2d173ca3.png

Take care,
Steven
No one can drive us crazy unless we give them the keys.