Replacement Motor
The Atlantic Water Gardens Gast replacement compressor fits the TPD300C and TPD400C pond aeration cabinet systems. When the compressor motor in your aeration cabinet fails or output drops significantly, replacing only the compressor unit is far more economical than replacing the entire cabinet system. The Gast brand is the industry standard for continuous-duty pond aeration and commercial aquaculture applications.
Why Replace Rather Than Repair
Gast compressors are assembled to tight tolerances and are not typically field-rebuildable at the motor level. When a compressor begins running hot, losing output, or making unusual noise, the most reliable fix is a complete unit swap. This OEM replacement drops directly into the TPD300C and TPD400C cabinet mounting points, reusing your existing airline connections and wiring — restoring full cabinet output in under 30 minutes with basic tools.
| Compatible Cabinets | Atlantic TPD300C and TPD400C aeration cabinets |
|---|---|
| Compressor Brand | Gast (industrial diaphragm type) |
| Duty Cycle | Continuous duty — 24/7 rated |
| Voltage | 120V, 60 Hz |
| Includes | Compressor motor assembly |
How to Replace
Disconnect the cabinet from power. Disconnect airline tubing from the compressor outlet. Remove the mounting hardware holding the old compressor in the cabinet. Install the new Gast compressor using the same mounting points and reconnect airline tubing. Restore power and confirm output on all diffuser lines. Replace the intake filter at the same time for best results.
Ideal for Canadian pond professionals maintaining TPD-series aeration cabinets in long-term installations.