Multiquip SP3308A1 Waterbox and Groove Assembly Pin

The Multiquip SP3308A1 Waterbox and Groove Assembly Pin is a genuine OEM component designed for STOW diaphragm pump models SDP-3, SDP-2, and CA90749. As a direct OEM replacement, this pin is produced to the same specifications as the original part, ensuring correct alignment and secure retention within the waterbox and groove assembly. Confirmed fitment for SDP-3 and SDP-2 series STOW diaphragm pumps means you can order with confidence that this is the right part for your machine.

Key Features

• Genuine OEM Construction — Manufactured to exact original specifications, ensuring the pin seats and retains correctly within the waterbox and groove assembly without dimensional compromise.
• Direct Assembly Fit — Designed to install directly into the waterbox and groove assembly, aligning with existing bores and grooves for a straightforward swap-out.
• Confirmed Fitment — Compatible with STOW diaphragm pump models SDP-3, SDP-2, and CA90749 series equipment.
• Maintains Pump Integrity — A correctly fitted waterbox pin keeps the assembly properly secured, preventing fluid bypass and maintaining consistent pump output pressure and flow.
• OEM Part Number Accuracy — Sourced directly through Multiquip's OEM supply chain under part number SP3308A1, eliminating guesswork when cross-referencing your parts manual.

The waterbox and groove assembly pin serves as a critical retention component within the diaphragm pump's waterbox — the chamber responsible for directing fluid through the pump's discharge cycle. This pin holds the assembly in its correct position, ensuring the waterbox remains properly aligned during operation. When this pin wears, bends, or fails, the assembly can shift or loosen, leading to fluid leakage, loss of prime, and reduced pumping efficiency. Replacing it promptly with the correct OEM part restores proper function and prevents further damage to surrounding pump components.

Part Details

Compatibility & Fitment

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.