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Problem: Volume of water is insufficient to adequately siphon fixture

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Problem: Volume of water is insufficient to adequately siphon fixture.

Cause: Control stop is not open wide enough.

Solution: Adjust control stop for desired delivery of water volume.

Cause: Adjust control stop for desired delivery of water volume.

Solution: Replace diaphragm assembly.

Cause: Low consumption diaphragm assembly is installed on water saver/conventional fixture or urinal diaphragm assembly is installed on closet fixture.

Solution: Determine the required flush volume (see label on valve or markings on fixture). Replace diaphragm assembly or relief valve for appropriate flush volume of fixture.

Cause: Inadequate water volume or pressure is available from supply.

Solution: Increase flow rate or pressure to the valve. If gauges are not available to measure supply pressure/volume, remove Relief Valve from Diaphragm Assembly and open the Control Stop.

If the fixture siphons: Additional water volume is required. Install higher flushing volume Relief valve or diaphragm assembly or cut flow ring from guide.

If the fixture DOES NOT siphon (or a low consumption flush is required): Additional steps must be taken to increase the water pressure and/or volume at the water supply.


Flush Valve

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