Aqua-Hot PLE-100-905-FRU Buehler C20 400/450 Pump Retrofit Kit

The Aqua-Hot PLE-100-905-FRU Buehler C20 400/450 Pump Retrofit Kit is a complete upgrade solution designed to replace older-style circulation, stir, and engine preheat pumps in Aqua-Hot and Hydro-Hot hydronic heating systems with the current-generation Buehler C20 pump. All components needed for a seamless retrofit installation are included, ensuring full compatibility with existing system plumbing and electrical configurations.

This pump kit serves multiple roles within a hydronic heating system. The circulation pump draws heated antifreeze and water-heating solution from the boiler tank and propels it through the system's interior heat plumbing. When a zone thermostat calls for heat, the Aqua-Hot controller activates the appropriate circulation pump, delivering warmth to that zone. The same pump design also serves stir and engine preheat functions, making this kit a versatile service part for the 400 and 450 series platforms.

Kit Contents:

• PLX-100-900 – Buehler C20 Pump (x1)
• PLX-100-836 – Pump Mount Bracket (x1)
• PLX-100-837 – Pump Bracket Isolator (x1)
• ELE-400-900 – Buehler C20 Pump Harness (x1)
• PLE-450-150 – 3/4" x 1/2" Straight Adapter Hose (x2)
• PLX-CTB-250 – Constant Tension Hose Clamp 23/32" (x2)
• PLX-CTB-270 – Constant Tension Hose Clamp 3/4" (x2)
• PLX-CTB-290 – Band Hose Clamp 1-1/16" (x2)
• PLX-000-433 – 3/4" Green Stripe Heater Hose (x26 inches)
• ELX-252-010 – Red Male Quick Disconnect Terminal 1/4" (x1)
• ELX-252-018 – Red Female Quick Disconnect Terminal 1/4" (x1)
• ELX-200-150 – Butt Connector 18–22 ga (x1)
• PLX-000-825 – 3/4" Black Nylon Coupler Fitting (x1)
• PLX-000-835 – 3/4" to 5/8" Black Nylon Reducer Fitting (x1)
• EB9X027SS – Worm Gear Clamp 16–27mm (x4)
• SME-850-850 – 450 Cooper to GRI Zone Bracket (x1)
• SR-5075B – Plastic Rivet (x4)
• MSX-210-985 – 12" Cable Tie (x2)
• Installation instructions and miscellaneous hardware

Note: As an electrical component, this part is non-returnable once installed. Verify system compatibility before installation.