A Hypro pump needs Hypro parts to get the best outcomes for repairs and replacements, that is why you need the 9910-KIT2423 D303 D403 Diaphragm Kit. This kit has three 9910-800085 diaphragms of standard design. During replacement, make sure you fully drain the oil from the crankcase.

Hypro/Pentair is no longer distributing the 9910 series of diaphragm pumps, components, and related parts. Products with Hypro labeling will be unavailable soon.

The Hypro D403 Diaphragm Repair Kit (9910-KIT2423) will provide repairs for the diaphragms on your Hypro D303 or D403 pump. If the oil in your diaphragm pump has a milky gray color, you most likely will need to replace the diaphragms. Running a diaphragm pump with oil that is mixed with chemical can cause extensive damage to your pump. Keep this kit handy if your D303/D403 is in constant use. We recommend changing the diaphragms every 3 months or 500 hours of use.

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9910-KIT2423 Includes:

• Qty 3 9910-800085 Piston Diaphragm, Desmopan®