Honda Q14-061L430 Air Chamber Plug O-Ring

The Honda Q14-061L430 Air Chamber Plug O-Ring is a genuine OEM Air Chamber Plug O-Ring designed for WDP20 and WDP30 diaphragm water pumps. As a factory-sourced component, it meets Honda's exact dimensional specifications, ensuring a proper seal at the air chamber plug without modification. This O-ring is the correct replacement for WDP20 and WDP30 pumps, and confirming your pump's serial number against the fitment table before ordering is always a smart step, as Honda does update part numbers at production breaks.

Key Features

• Genuine OEM Sealing Integrity — sourced directly from Honda, this O-ring matches the exact profile and durometer required to maintain an airtight seal at the air chamber plug on WDP-series diaphragm pumps
• Direct Replacement Fit — dimensionally identical to the original, this O-ring seats into the plug recess without trimming, stretching, or adaptation
• Diaphragm Pump Compatibility — built specifically for WDP20 and WDP30 diaphragm water pumps; verify your serial number against the fitment table to confirm the correct variant
• Restored Air Chamber Function — a degraded or cracked O-ring allows air pressure in the chamber to leak, reducing pumping consistency; replacing it restores steady, even flow output

In a diaphragm water pump such as the WDP20 and WDP30, the air chamber works alongside the reciprocating diaphragm to smooth out the pulsing action inherent to this pump design, delivering a more consistent flow. The air chamber plug seals the pressurized air side of that chamber, and the O-ring at the plug is what maintains that seal under repeated pressure cycles. When this O-ring hardens, cracks, or takes a set, air pressure bleeds past the plug, the chamber loses its dampening effect, and the pump's output becomes uneven or drops off entirely — replacing it is a straightforward service step that restores the pump to proper working order.

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.