General Pump 90385700 Valve Cap O-Ring 23.81x2.62mm - 4240
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The General Pump 90385700 is a genuine OEM replacement O-ring that seals the valve caps on General Pump TSF Series plunger pumps. It sits between each valve cap and the pump manifold, keeping water contained under high pressure and preventing leaks around the valve chambers. It measures 23.81 mm x 2.62 mm and is made from Buna-N (nitrile) rubber with a 70 durometer hardness, a firm, general-purpose compound that holds its shape under pressure and resists water, oils, and many common cleaning solutions. It’s rated to a maximum temperature of 212°F.
Valve cap O-rings wear from pressure cycling and from being disturbed during valve service, so it’s best practice to replace them whenever you remove the caps to inspect or change valves. A fresh O-ring restores a tight seal and helps prevent leaks that can lead to pressure loss or manifold damage.
Key features:
- 23.81 mm x 2.62 mm
- Buna-N (nitrile), 70 durometer
- Max temperature 212°F
- Seals the valve cap against the pump manifold
- Genuine OEM General Pump part for an exact fit