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These replacement diaphragms fit both PA 2 and PA 4 models. PA 2 models have (1) diaphragm. PA 4 models have (2) diaphragms. Diaphragms should be replaced every 1 to 2 years or as needed. Consider replacing your air stones as well to get the maximum air flow into your pond. Includes written instructions on how to replace the diaphragm -- or just watch our video below! Watch the video below to see how to replace your pond aerator diaphragms!
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🇺🇸 Ship from USA · On Agora since 2026
$13.99