Ken’s Distributing Company supplies OEM-fit AMT replacement diaphragms and check valve assemblies for diaphragm-type trash and dewatering pumps.
Each diaphragm controls the suction and discharge motion inside the pump, separating the air and liquid chambers for smooth, reliable operation. All AMT pumps in this category are single-diaphragm aluminum designs featuring an oil-bath gearbox, needle plunger bearing, and neoprene check valve assembly.
We stock replacement diaphragms in Rubber, Neoprene, Buna-N, and Thermoplastic Elastomer (TPE) — four proven materials that cover nearly every pumping condition from clean water to abrasive slurry and hydrocarbon exposure. Bulk orders of 15 units or more qualify for discount pricing for contractors, distributors, and small businesses nationwide.
Fits AMT 2″ diaphragm pump models:
338Z-96 (Hatz 1B30 Diesel)
338G-96 (Honda GX120)
338L-96 (LCT 280CC) 338E-96 (1.5 HP 115 VAC @ 60 Hz)
338T-96 (1.5 HP 3-Phase 208–230/460 VAC @ 60 Hz).
Each pump uses one diaphragm. Connection: 2″ NPT.
Replacement diaphragm part number
3380-300-00
| Compound | Best Application |
|---|---|
| Rubber | General-purpose diaphragm for clear water or light sediment. |
| Neoprene | Chemical- and abrasion-resistant for dirty water and slurry. |
| Buna-N | Excellent resistance to oil, fuel, and hydrocarbon-contaminated liquids. |
| TPE (Thermoplastic) | Long-life diaphragm with high flexibility and broad temperature tolerance. |
#3360-070-90 (Neoprene)
small construction dewatering, trench and pit pumping, irrigation systems, and light industrial service.
Fits AMT 3″ diaphragm pump models
337G-96 (Honda GX120)
337H-96 (Honda GX160)
337L-96 (LCT 280CC), 337Z-96 (Hatz 1B30 Diesel)
337E-96 (1.5 HP 115 VAC @ 60 Hz)
337T-96 (1.5 HP 3-Phase 208–230/460 VAC @ 60 Hz).
Each pump uses one diaphragm. Connection: 3″ NPT
Replacement diaphragm part number
3370-300-00
| Compound | Best Application |
|---|---|
| Rubber | Standard choice for clean or sediment-filled water. |
| Neoprene | Tough, flexible, and resistant to abrasion in construction or wastewater. |
| Buna-N | Oil- and fuel-resistant for hydrocarbon-exposed sites. |
| TPE (Thermoplastic) | Premium compound for extended life under abrasive and chemical exposure. |
#3354-070-90 (Neoprene)
large-volume construction dewatering, municipal bypass and storm-water control, industrial slurry and wastewater transfer.
