The Multiquip SP3313 Valve Weight is a genuine OEM Valve Weight designed for STOW diaphragm pump models SDP-2, CA90749, and SDP-3. As a direct OEM replacement, the SP3313 is manufactured to the same specifications as the original component, ensuring consistent valve operation and pump output. DHS Equipment stocks this part for operators who need a dependable, verified replacement to restore proper pump function without guesswork on fitment.
Key Features
- OEM-Matched Weight and Geometry — Manufactured to the original mass and dimensional spec, so the valve opens and closes at the correct differential pressure for this pump family.
- Direct Drop-In Replacement — Installs into the valve assembly the same way as the factory original, with no modification to the valve housing or cage required.
- Confirmed Fitment — Verified for STOW diaphragm pump models SDP-2, CA90749, and SDP-3.
- Restores Consistent Flow and Prime — A worn or incorrect valve weight causes erratic priming, pressure loss, and backflow; replacing with SP3313 restores steady, repeatable pump output.
- Genuine Multiquip OEM Part — Sourced directly through the Multiquip parts network, backed by the same quality controls applied to every original component on the production line.
A valve weight is a critical component in a diaphragm pump's check valve assembly. It sits on top of the valve disc and uses gravity to help seat the valve, preventing backflow between strokes and maintaining the suction and discharge cycle that keeps fluid moving through the pump. When a valve weight is worn, cracked, or missing, the valve cannot seat correctly — leading to loss of prime, reduced output pressure, and uneven discharge. Replacing a damaged valve weight with the correct OEM part restores the intended seating force and keeps the pump cycling efficiently.
Have questions about fitment or need help confirming this is the right part for your pump? Contact the DHS Equipment parts team for support.
Part Details
| Part Number | SP3313 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Valve Weight |
Compatibility & Fitment
| Name | Model |
|---|---|
| STOW Diaphragm Pumps | SDP-2 |
| STOW Diaphragm Pumps | CA90749 |
| STOW Diaphragm Pumps | SDP-3 |
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.
