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// CODE SNIPPET

1603.6 Drainage and Overflow

California Plumbing Code 2019 > 16 Nonpotable Rainwater Catchment Systems > 1603.0 Rainwater Storage Tanks > 1603.6 Drainage and Overflow
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Rainwater storage tanks shall be provided with a means of draining and cleaning. The overflow drain shall not be equipped with a shutoff valve. The overflow outlet shall discharge in accordance with this code for storm drainage systems. Where discharging to the storm drainage system, the overflow drain and tank drain shall be protected from backflow of the storm drainage system by a backwater valve or other approved method. Backwater valves shall be installed so that access is provided to the working parts for service and repair.

1603.6.1 Overflow Outlet Size

The overflow outlet shall be sized to accommodate the flow of the rainwater entering the tank and not less than the aggregate cross-sectional area of inflow pipes.

Related Code Sections


1602.9.5.5 Nonpotable Rainwater Catchment Systems, Drainage and Overflow
overflow outlet shall discharge in accordance with this code for storm drainage systems. Where discharging to the storm drainage system, the overflow ...
California Plumbing Code 2016 > 16 Nonpotable Rainwater Catchment Systems > 1602.0 Nonpotable Rainwater Catchment Systems > 1602.9 Design and Installation > 1602.9.5 Rainwater Storage Tanks > 1602.9.5.5 Drainage and Overflow
1603.6 Nonpotable Rainwater Catchment Systems, Drainage and Overflow
overflow outlet shall discharge in accordance with this code for storm drainage systems. Where discharging to the storm drainage system, the overflow ...
California Plumbing Code 2019 > 16 Nonpotable Rainwater Catchment Systems > 1603.0 Rainwater Storage Tanks > 1603.6 Drainage and Overflow
404.0 Plumbing Fixtures and Fixture Fittings, Waste Fittings and Overflows
Waste fittings shall comply with ASME A112.18.2/CSA B125.2, ASTM F409 or Table 701.2 for aboveground drainage piping and fittings ...
California Plumbing Code 2019 > 4 Plumbing Fixtures and Fixture Fittings > 404.0 Waste Fittings and Overflows
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