3″ AMT Replacement Diaphragm – Neoprene (No Holes)
The 3 Inch AMT Replacement Diaphragm – Neoprene (No Holes) gives you a blank neoprene diaphragm that can be drilled or cut to match your specific pump configuration. This replacement diaphragm is made from the same durable neoprene as our standard holed versions and fits AMT 3″ diaphragm pumps. It is a good solution when your pump has a non-standard bolt pattern or when you need a custom fit that a pre-drilled diaphragm cannot provide. Order it, drill it to spec, and install it.
Key Features
- Fits AMT 3″ diaphragm pumps and can be drilled to your exact bolt pattern.
- Neoprene construction for strong resistance to abrasion and mild chemicals.
- No pre-drilled holes, giving you full control over hole placement and sizing.
- Handles muddy water, slurry, sludge, and construction site runoff.
- Useful for non-standard configurations or when standard holed diaphragms do not fit.
- In stock and ships fast from Ken’s Distributing.
Specifications and Compatibility
- Size: 3 Inch
- Material: Neoprene
- Pump Compatibility: AMT 3″ diaphragm pumps (custom drill required)
- Part Type: Replacement Diaphragm
- Use: Custom-fit mud pump, trash pump, and dewatering applications
Why the 3 Inch AMT Replacement Diaphragm – Neoprene (No Holes) Is the Right Solution for Non-Standard Pumps
Some AMT 3″ pumps have bolt patterns that do not match a pre-drilled diaphragm right out of the box. Other times a rebuild changes the configuration, and a standard part just does not seat correctly. The no-holes version solves that problem cleanly. You get the same neoprene material and 3″ sizing, but you control exactly where the holes go.
This approach is also common in repair shops and rental fleets that service a variety of pump configurations. Having a blank neoprene diaphragm on hand means you can cut it to fit whatever comes through the door. The material is thick enough to hold up in tough use after drilling and handles the same conditions as our standard 3″ neoprene versions.
Cross-Compatibility
The 3 Inch AMT Replacement Diaphragm – Neoprene (No Holes) is designed for AMT 3″ diaphragm pumps that require a custom hole pattern. If your AMT 3″ pump uses a standard bolt pattern, see our Model 335 neoprene page for a pre-drilled option. We also carry no-holes versions in TPE and standard pre-drilled diaphragms for brands like CH&E, Magnum, Mud Hog, Wacker, Gorman-Rupp, Multiquip, and Riverside.
Frequently Asked Questions
Q. What Pump Does This No-Holes Diaphragm Fit?
The 3 Inch AMT Replacement Diaphragm – Neoprene (No Holes) fits AMT 3″ diaphragm pumps when the bolt pattern needs to be custom drilled. Measure your existing diaphragm and mark your hole positions before cutting. If you are unsure about your pump’s configuration, call us before ordering and we will help you figure out which version you need.
Q. How Does This Compare to the Pre-Drilled AMT Model 335 Neoprene Diaphragm?
The material and size are identical. The only difference is that this version comes without pre-drilled holes, which gives you the flexibility to match a non-standard configuration. If your pump uses the standard Model 335 bolt pattern, the pre-drilled version is the easier install. If not, this no-holes version is the one to order.
Q. How Long Does This Neoprene Diaphragm Last After Custom Drilling?
Service life is the same as any standard 3″ neoprene diaphragm. In typical mud and construction water use, expect six months to a year of daily operation. Proper hole drilling and correct installation are key to getting the full life out of this part. Sloppy drilling that puts holes too close to the edge can lead to early tearing.
Q. Does This Come in TPE or Rubber Without Holes?
Yes. The 3 Inch AMT Replacement Diaphragm – Neoprene (No Holes) also has a TPE version without holes listed on our site. Rubber is not currently available in the no-holes format for this size. If you want to compare materials or need help deciding between neoprene and TPE for your custom application, call us and we will walk you through the options.