Pressure washers put seals under far more stress than a garden hose. When you see water spraying from a hose connection, wand, or quick-connect, a failed rubber washer or seal is the usual cause.
Where pressure washers leak
The most common leak points are the hose-to-machine and hose-to-wand connections, the trigger gun inlet, and quick-connect couplers. Each relies on a small washer or seal that takes a beating from high pressure and vibration.
Choosing a material that holds up
For cold-water units, Nitrile and EPDM seal reliably under pressure. For hot-water pressure washers, step up to Viton or Silicone, which keep their seal at high temperatures. If detergents or solvents pass through the system, Viton resists them best.
Match the size exactly
High-pressure seals must fit precisely, so measure the worn washer first - OD, ID, and thickness. See the measuring guide and size chart, then shop the full catalog or contact us for help matching a part.