Description
Overview:
The Oval Clack P21 is a durable, black rubber valve seal for Wickham pumps. It serves as the clack (non-return) sealing element, helping the pump hold prime, prevent backflow, and maintain strong suction. Sized to suit housings commonly found on Wickham site and dewatering pumps, including the Wickham Pump 165, it replaces worn or perished clacks to restore reliable operation. The oval profile includes a central aperture and accurately spaced fixing holes to match the original pattern. Dimensions are Height 165 mm (6.5 inches), Width 147 mm (5.8 inches), Top hole centres 70 mm (2.8 inches), and Centre hole diameter 18 mm (0.7 inches). Supplied as a single replacement part. Manufacturer Part Number (MPN): 836 021.
Key Features:
- Direct replacement clack for Wickham pumps to restore sealing and suction performance
- Tough rubber construction for long service in wet and abrasive environments
- Accurate sizing: 165 mm (6.5 inches) high x 147 mm (5.8 inches) wide
- Top hole centres: 70 mm (2.8 inches) for straightforward alignment with existing fixings
- Centre hole diameter: 18 mm (0.7 inches) to match original port size
- Helps prevent backflow and loss of prime for smoother, more efficient pumping
- Simple to install during routine maintenance with basic hand tools
- Stable oval shape resists distortion under load, maintaining a consistent seal
- Suitable for refurbishments and preventive maintenance schedules
- MPN 836 021 for easy identification and parts ordering
Typical Applications:
Used during servicing or overhaul of Wickham pumps to replace a worn or damaged clack seal. Ideal for site drainage, dewatering, irrigation, and general water transfer where maintaining suction and preventing reverse flow is essential. Helps restore performance on older units and keeps frequently used pumps running reliably.
Also known as:
Pump clack, rubber clack, oval rubber seal, clack valve, flapper valve, non-return valve flap, check valve seal, NRV seal, suction valve gasket.
Fits Models:
Wickham Pump 165
Product Specifications
| L&S Part No. | 836 021 |
|---|---|
| Unit of Sale | 1 |
| Machine Type | Pumps |
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