The Multiquip SP4859 O Ring SDP-2 is a genuine OEM sealing component designed for STOW SDP-2 diaphragm pumps. As a direct OEM replacement, this O ring is manufactured to the exact material grade and dimensional tolerances required to maintain a proper seal within the pump assembly. Confirmed for SDP-2 series diaphragm pumps, the part installs as a direct drop-in with no modification needed to the surrounding hardware. Keep a spare on hand to minimize service interruptions during pump maintenance or rebuild work.
Key Features
- Genuine OEM Sealing Material — Manufactured to the exact compound grade and durometer specified for diaphragm pump service, ensuring full compression and a leak-free interface.
- Exact Dimensional Fit — Matches the original cross-section and inner diameter of the SDP-2 pump assembly, seating correctly in the groove without gaps or distortion.
- Confirmed SDP-2 Fitment — Sourced specifically for STOW SDP-2 series diaphragm pumps, so you can order with confidence in compatibility.
- Leak Prevention — A properly seated O ring keeps fluid contained within the pump circuit; a cracked or flattened ring leads to pressure loss and fluid bypass that degrades pump output.
- Ideal for Rebuild and Maintenance Kits — Compact and low-cost, this O ring is a smart addition to any diaphragm pump service kit to keep rebuild work moving without waiting on parts.
An O ring is a precision-molded elastomeric seal that sits in a machined groove between two mating surfaces, creating a pressure-tight barrier that prevents fluid from escaping the pump circuit. In a diaphragm pump, O rings are critical at valve seats, port connections, and cover interfaces where internal pressure cycles with every stroke. When an O ring degrades — through chemical exposure, compression set, or physical cracking — it loses its ability to seal, resulting in fluid leakage, lost prime, and reduced pumping efficiency. Replacing a worn O ring with the correct OEM-spec component like the Multiquip SP4859 restores the pump to its designed operating condition.
Part Details
| Part Number | SP4859 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O Ring SDP-2 |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-2 |
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.
