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To Know How - GROHE

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Urinal flush valve 37 144<br />

Problem Cause Remedy<br />

Continuous running • Nozzle blocked<br />

• Clean nozzle<br />

• Piston seal defective<br />

• Replace<br />

No flushing or flushing<br />

too short<br />

Water emerging<br />

from under the<br />

pushbutton cap<br />

• Lid defective<br />

• Leather seal dry or damaged<br />

• Relief valve defective<br />

• Replace<br />

• Expand or replace<br />

• Replace lid<br />

Urinal flush valve 37 021<br />

Problem Cause Remedy<br />

Continuous running<br />

/ persistent low<br />

water flow<br />

• Isolating valve not fully open<br />

• Nozzle blocked<br />

• Relief valve defective<br />

• Piston seal damaged<br />

• Open isolating valves fully<br />

• Clean piston, see Maintenance<br />

• Replace lid, see Maintenance<br />

• Replace, see Maintenance<br />

No flushing or flushing<br />

too short<br />

Water emerging<br />

from under the<br />

pushbutton cap<br />

• Leather seal dry or damaged<br />

• Flow volume incorrect<br />

• Seal installed incorrectly<br />

• Cap seal defective<br />

• Relief valve defective<br />

• Expand or replace leather seal, see Maintenance<br />

• Adjust flow volume, see Changing the flow volume<br />

• Rotate seal, see Maintenance<br />

• Replace, see Maintenance<br />

• Replace lid, see Maintenance<br />

D 50

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