The round air filter mounted on the bottom of all Rena Air model pumps should be replaced when dirty to avoid damage to the air pump valves and increased clogging of air diffusers. The Rena Air series and Rena 301 air pumps have been discontinued. These round air filters will work on the later version 301's and all the Rena Air series pumps except the Rena Air 50.
- Approx Size: 3/4" Diameter x 1/4" thick
- Material: Felt
- Color: Dark Gray or White
- Fits Rena Air Series Pumps RA100,200,300,400
- Fits Rena 301 Air Pumps made after 2006 (smaller filter)
- Does not fit 301 air pumps with larger 1-5/8" filter diameter made before 2006