Posted by Bill on 7/26/2016 to Technical Support
The Rena Air series air pumps produced by Rena France for nearly 20 years are no longer being manufactured. These were discontinued by Mars Fishcare/API in 2012. We have all parts except 1 still available. We no longer have diaphragms. But you can still find diaphragms available from places such as Amazon and by generally just doing a search for Rena Air repair kits. In most cases you will only be able to find the complete repair kits for the Rena Air 100 & 200. But the diaphragm will fit the valve blocks for the Rena Air 300 and 400. The solution is to buy the kits for the 100 and 200 and use the diaphragm for those kits along with the valve blocks for Rena Air 300 & 400.