Monarch Industries Water Pump AOT 4 – 5 – 6 Series End Suction Water Pump & Repair Parts
Monarch Industries Water Pump AOT 4, 5 & 6 Series — End Suction Repair Parts
Monarch Industries Water Pump AOT 4, 5 & 6 Series are frame-mounted, end suction, self-priming centrifugal pumps designed for belt drive or direct drive through a flexible coupling compatible with both electric motor and gasoline engine power sources.
The Monarch Industries Water Pump AOT Series is engineered for high-performance fluid transfer and pressure boosting in commercial, industrial, and agricultural environments. The rugged cast
gray iron casing delivers long-lasting durability, while discharge openings of 1″, 1¼”, and 1½” NPT accommodate a wide range of installations. The Buna/carbon ceramic mechanical seal ensures reliable
leak prevention and extended service life.
Open-face cast gray iron impellers maximize flow and efficiency across all three frame sizes. Robust construction minimizes downtime, and genuine OEM repair parts including casings, impellers, shaft
assemblies, seals, and gaskets — are stocked for fast fulfillment. The Monarch Industries Water Pump AOT line offers full parts interchangeability with the Franklin Electric FAOT Series as shown in the compatibility table below.
Monarch Model Numbers AOT & Franklin Electric FAOT
| Model | Monarch Industries — AOT Series | Franklin Electric — FAOT Series | |
|---|---|---|---|
| AOT-4 | Monarch Industries End Suction Water Pump AOT-4 615111 | ↔ | Franklin Electric FAOT-4 90251004 |
| AOT-5 | Monarch Industries End Suction Water Pump AOT-5 615121 | ↔ | Franklin Electric FAOT-5 90251005 |
| AOT-5 | Monarch Industries End Suction Water Pump AOT-6 615131 | ↔ | Franklin Electric FAOT-6 90251006 |
Monarch Industries AOT Series — Full Repair Parts List
AOT-4, AOT-5 & AOT-6 — Parts by Reference Number
| Ref.# | Code # | Pump Model No. | Qty. | Description |
|---|---|---|---|---|
| 1 | 437711 | AOT-4 | 1 | Casing |
| 1 | 437721 | AOT-5 | 1 | Casing |
| 1 | 437732 | AOT-6 | 1 | Casing |
| 2 | 438110 | AOT-4 | 1 | Impeller |
| 2 | 438120 | AOT-5 | 1 | Impeller |
| 2 | 438150 | AOT-6 | 1 | Impeller |
| 3 | 437860 | AOT-4, AOT-5, Type A | 1 | Transmission Head |
| 3 | 437861 | AOT-4, AOT-5, Type B | 1 | Transmission Head |
| 3 | 437870 | AOT-6, Type A | 1 | Transmission Head |
| 3 | 437862 | AOT-6, Type B | 1 | Transmission Head |
| 8 | 438450 | Type A | 1 | Shaft Assembly |
| 8 | 438451 | Type B | 1 | Shaft Assembly |
| 14 | 119990 | All Models | 4 | Hex. Hd. Bolt |
| 22 | 191790 | All Models | 1 | Flinger |
| 23* | 175500 | All Models | 4 | Aluminum Washer |
| 25 | 185620 | All Models | 2 | Pipe Plug |
| 26* | 193900 | AOT-4, AOT-5 | 1 | Gasket |
| 26* | 193910 | AOT-6 | 1 | Gasket |
| 28 | 432010 | All Models | 1 | Key |
| 29 | 138230 | Type A | 1 | Spring Ring |
| 29 | 137930 | Type B | 1 | Spring Ring |
| 31* | 240250 | All Models | 1 | Seal 5/8 I.D., Type 6 |
* Suggested parts to stock
Ordering Information
| IMPORTANT: | When ordering parts, specify the model and type, code number, and part description. |