3″ AMT Replacement Diaphragm – Rubber (Model 335)
The 3 Inch AMT Replacement Diaphragm – Rubber (Model 335) is the practical, cost-effective choice for contractors who run AMT Model 335 pumps on clean water or light-duty dewatering jobs. Made from standard rubber, this replacement diaphragm fits the AMT 3″ Model 335 pump directly and creates a reliable seal for low-abrasion applications. When the job does not demand neoprene or TPE, this part keeps your pump running without stretching the parts budget.
Key Features
- Fits AMT 3″ Model 335 diaphragm pumps with a direct, clean install.
- Standard rubber suited for clean water and lower-abrasion pumping jobs.
- OEM-quality fit with matched dimensions for a reliable, leak-free seal.
- Best for groundwater control, utility dewatering, and light site drainage.
- Economical choice for contractors who do scheduled maintenance replacements.
- In stock and available to ship quickly from Ken’s Distributing.
Specifications and Compatibility
- Size: 3 Inch
- Material: Rubber
- Pump Compatibility: AMT 3″ Model 335 diaphragm pumps
- Part Number: 3350-300-00
- Part Type: Replacement Diaphragm
- Use: Dewatering, groundwater removal, light-duty pumping
Why the 3 Inch AMT Replacement Diaphragm – Rubber (Model 335) Makes Sense for Low-Demand Work
The AMT Model 335 moves a high volume of water per stroke, and when that water is clean, standard rubber handles the job without issue. Rubber flexes smoothly across thousands of pump cycles in low-abrasion conditions and holds its seal well. For contractors who do groundwater drawdown, pond drainage, or utility dewatering where the source water is fairly clean, this 3″ rubber diaphragm is all you need.
It is also the material of choice when you are running a planned maintenance schedule and want to manage parts costs. Rubber is the most affordable option for the Model 335 and gives you solid, predictable performance in the right conditions. Keep one in the shop and one in the truck and you are never stuck waiting on a part.
Cross-Compatibility
The 3 Inch AMT Replacement Diaphragm – Rubber (Model 335) is designed for AMT 3″ Model 335 diaphragm pumps. If your AMT 3″ pump handles dirtier or more chemically active water, the neoprene or TPE versions of this diaphragm are listed separately on our site. We also carry rubber diaphragms for the AMT 2″ Model 336 and for CH&E, Magnum, Mud Hog, Wacker, Gorman-Rupp, Multiquip, and Riverside pumps.
Frequently Asked Questions
Q. What Pump Does This Diaphragm Fit?
The 3 Inch AMT Replacement Diaphragm – Rubber (Model 335) is built for AMT 3″ Model 335 diaphragm pumps. Check the model number on your pump and the size on your current diaphragm before placing your order. The right fit ensures a clean seal from the first stroke and full pump output right out of the gate.
Q. How Does Rubber Hold Up Compared to Neoprene or TPE on a Model 335?
Rubber is the right material when the job is clean and conditions are mild. Neoprene is the step up for muddy, gritty, or mildly chemical environments and will outlast rubber in those conditions. TPE is the premium choice for heat and chemical resistance. If your water is mostly clean and the job is low demand, rubber is a reliable and affordable option.
Q. How Long Will a Rubber Diaphragm Last on an AMT 3″ Pump?
In clean water use, a rubber diaphragm can hold up for a year or more. The 3″ pump runs at a higher cycle rate than a 2″ unit, so the diaphragm works harder per hour. In very clean conditions it still holds up well, but if the water starts picking up grit or fine particles, plan to check it monthly. Keeping a spare on hand is always a good practice.
Q. Can I Order This by Part Number?
Yes. The 3 Inch AMT Replacement Diaphragm – Rubber (Model 335) corresponds to AMT part number 3350-300-00. You can use that number to confirm the fit before ordering. If you want to verify it against your pump model or serial number, call us and we will make sure you are ordering the right part.