Description
Overview:
This O-ring is a vital service part for Koshin petrol water pumps, made from durable black rubber to provide a tight, water-resistant barrier between mating components. It helps prevent leaks, supports priming, and maintains pumping efficiency by limiting air and water bypass. Manufactured as a direct replacement for OEM number 050 784, it is sized for popular Koshin models including SEH50X and STH50X. Replacing a flattened or nicked ring during routine maintenance restores dependable sealing performance and reduces the risk of unwanted drips and air ingress. The flexible rubber material fits neatly in the groove and is straightforward to install with basic hand tools, offering reliable performance in typical site conditions across construction, landscaping, and general water transfer tasks.
Key Features:
- Direct replacement for OEM 050 784 for a correct fit
- Durable black rubber for long service life
- Precision-moulded to sit properly in the groove and seal evenly
- Helps maintain suction and pump efficiency by minimising bypass
- Compatible with Koshin SEH50X and STH50X
- Flexible material for quick, simple installation
- Resists common site contaminants and temperature changes
- Practical, low-cost fix for leaks from pump casing joints
Typical Applications:
Used when servicing or rebuilding the pump head, after impeller clean-outs, or when symptoms such as drips, loss of prime, or air ingress appear. Suitable for clean water and light silt handling in construction sites, landscaping, irrigation, garden drainage, and emergency dewatering. Useful for tradespeople, hire fleets, and DIY users who need reliable pump performance.
Also known as:
Sometimes referred to as a toric ring, packing ring, elastomer ring, pump joint, static sealing ring, or housing ring used in centrifugal pump assemblies.
Fits Models:
SEH50X
STH50X
Product Specifications
| L&S Part No. | 050 784 |
|---|---|
| Unit of Sale | 1 |
| Applications | Koshin, SEH50X, STH50X |
| Machine Type | Pumps |
| Fits Brands | Koshin |
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