The Multiquip SP2331TPE Diaphragm is a genuine OEM replacement designed for STOW Diaphragm Pump models SDP-3, SDP-2, and CA90749. As a factory-sourced component, this diaphragm meets the original design specifications set for these pumps, ensuring a correct fit without modification. Sourced directly through Multiquip's OEM parts program, the SP2331TPE is the same component that ships with new equipment — giving you confidence that you're restoring your pump to its original operating condition. Verify your model code against SDP-3, SDP-2, or CA90749 before ordering to confirm fitment.
Key Features
- Genuine OEM Diaphragm Material: — Manufactured to the original flex and durability spec required for consistent pumping action in STOW diaphragm pump applications.
- Direct-Swap Replacement: — Engineered to seat and seal exactly as the original diaphragm, with no trimming or reworking of mounting surfaces needed.
- Confirmed Fitment: — Compatible with STOW Diaphragm Pump models SDP-3, SDP-2, and CA90749.
- Restores Full Pump Output: — A worn or cracked diaphragm causes loss of prime, reduced flow, and fluid bypass; replacing it with SP2331TPE brings pump output back to rated capacity.
- Fluid Integrity Assurance: — A correctly seated OEM diaphragm maintains the separation between fluid chambers, preventing cross-contamination and keeping the pumping cycle efficient and leak-free.
The diaphragm is the core flexing membrane inside a diaphragm pump that alternately expands and contracts to draw fluid in through the inlet valve and push it out through the discharge valve. Because it is in constant motion under pressure, the diaphragm is one of the highest-wear components in the pump and will eventually crack, stiffen, or tear with use. When the diaphragm fails, the pump loses its ability to move fluid effectively — symptoms include loss of prime, pulsating or no discharge flow, and fluid leaking into the air chamber. Replacing the diaphragm promptly with the correct OEM part restores the pump's pressure differential and gets fluid moving again.
Part Details
| Part Number | SP2331TPE |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Diaphragm |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-3 |
| STOW Diaphragm Pumps | SDP-2 |
| STOW Diaphragm Pumps | CA90749 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
