Air Max PS20 Pond Aerator Maintenance & Rebuild (Step-by-Step Guide)

Subscribe to EvolutionDIY:    / @evolutiondiy   Watch my Other Videos:    • EvolutionDIY Playlist   Air Max PS20 Pond Aerator Maintenance & Rebuild (Step-by-Step Guide) Keep your pond healthy and your aerator running like new. In this video, I walk through a complete maintenance and rebuild of my Air Max PS20 pond aerator, including replacing the piston seals, head assembly, air filters, and a failed starting capacitor. If your aerator won’t start, is losing pressure, or just needs annual service, this guide shows you exactly how to fix it — and save $100+ by doing it yourself. ⸻ What This Video Covers • How to replace the piston cups (rings) on an Air Max PS20 Pond Aerator • Replacing the head assembly and rubber gaskets • Diagnosing and replacing a bad starting capacitor • Cleaning and replacing the air filter and foam pre-filter • Proper torque specs (around 50 inch-lbs) • Tips to avoid stripping aluminum threads • Full seasonal maintenance checklist This is standard annual maintenance for the PS20 and can be done in about an hour with basic tools. ⸻ Why This Maintenance Is Important The PS20 uses dual pistons to compress and pump air into your pond. Over time: • Piston seals wear out • Air filters clog • Gaskets deteriorate • Capacitors can fail If ignored, you’ll lose air pressure — or the unit may stop starting altogether. ⸻ Tools Used in This Video Here’s everything I used for the job (I may earn commission on links): Torx/Allen Combo Set: https://amzn.to/4qCOl9I Socket Set: https://amzn.to/469RfLM • Torx T20 bit (1/4” drive) • Torx T25 bit (1/4” drive) • 4mm Allen wrench • 1/4” drive socket • 1/4” drive extension • Torque wrench (inch-pound capable, ~50 in-lbs range) • 3/8” to 1/4” drive adapter • Flathead screwdriver (for capacitor removal) • Shop vacuum • Toothbrush (for cleaning debris) • Paper towels • Silicone lubricant (light coating for air filter install) ⸻ Parts Replaced (I may earn commission on some links): • Airmax PS20: https://amzn.to/3MH27Kw • Maintenance Kit: https://www.thepondguy.com/product/ai... • Air Filter: https://www.thepondguy.com/product/ai... • Foam Filter: https://www.thepondguy.com/product/ai... ⸻ Signs Your PS20 Needs Service • Aerator won’t start • Humming sound but no airflow • Reduced bubble output in pond • You have to “kick start” it with a screwdriver (bad capacitor) • It’s been over 12 months since last maintenance ⸻ Timestamps 0:00 Overview of the PS20 aerator 0:54 Opening the unit 1:02 Diagnosing a bad starting capacitor 1:59 Tools needed 3:28 Disassembly process 4:32 Replacing piston cups 6:13 Installing new head assembly 8:25 Installing starting capacitor 8:45 Replacing air filter 9:13 Full maintenance complete ⸻ Save Money & Extend the Life of Your Pond Aerator Doing this annual rebuild keeps your pond properly aerated, protects fish health, and extends the life of your system. If this video helped you: 👍 Like the video 💬 Drop a comment if you have questions 🔔 Subscribe for more pond maintenance and DIY content ⸻ #pondmaintenance #pondaerator #airmax #DIYrepair #pondcare