leak Troubleshooting

Water leaking from pump on the Makita HW111

Source: Bosch support — power tool troubleshooting Confidence: 80% Verified Aug 9, 2026

Water leaks from the pump housing, usually from a worn seal or a loose fitting.

How to fix Water leaking from pump

Tighten fittings

Check and tighten all hose and pump fittings.

Source: ProductDB new-categories research catalog Confidence: 80% Verified Aug 8, 2026
Difficulty: ★ Est. 5 min

Replace the pump seal kit

If the leak persists, replace the pump seal kit following the service manual.

Source: ProductDB new-categories research catalog Confidence: 80% Verified Aug 8, 2026
Difficulty: ★★★ Est. 45 min

Check the hoses

Inspect the hoses for damage and replace if needed.

Source: Bosch support — power tool troubleshooting Confidence: 80% Verified Aug 9, 2026
Difficulty: ★ Est. 5 min

Parts needed: Makita HW111 High-Pressure Hose

Replace the O-rings

Replace the O-rings on the connections.

Source: Bosch support — power tool troubleshooting Confidence: 80% Verified Aug 9, 2026
Difficulty: ★ Est. 10 min

Replacement parts for the Makita HW111

Makita HW111 Pump Oil Makita HW111 Pump Seal Kit Makita HW111 Water Inlet Filter Makita HW111 Nozzle Makita HW111 High-Pressure Hose Makita HW111 Spray Gun Makita HW111 O-Ring Set Makita HW111 Detergent

← All Makita HW111 error codes

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