RAIN WATER DRAINAGE

Sump Pits and Pumps

Sump Pit and Sump Pump Requirements
1. Install a sump pump that has the capacity to discharge storm water at the anticipated flow rate and to move water up any required vertical distance.
2. Install a sump pit that is at least (≥) 18 inches wide and 24 inches tall, unless the building official approves a different size.
3. Construct the sump pit using concrete, steel, or plastic with a solid bott om capable of supporting the pump.
4. Install an accessible full-fl ow check valve on the pump discharge pipe.
5. Install electrical circuits for the sump pump according to IRC requirements and the pump manufacturer’s instructions.
6. Install discharge pipes, including the underground drain pipes, that are at least (≥) as large as the pump discharge outlet.

Underground Storm Water Drains

Underground Drain Materials and Installation Requirements
1. Use at least a (≥) 4 inches diameter pipe of an approved type. The most common pipe materials for underground storm water drains are solid and perforated corrugated polyethylene and PVC drain pipe.
2. Install an accessible backwater valve if the storm water drainage system could allow water to flow into the building.
3. Discharge the water to an approved location above ground or into a sump pit, dry well, or a trapped area drain. Read the full Topic

Underground Storm Water Drains

Underground Drain Materials and Installation Requirements
1. Use at least a (≥) 4 inches diameter pipe of an approved type. The most common pipe materials for underground storm water drains are solid and perforated corrugated polyethylene and PVC drain pipe.
2. Install an accessible backwater valve if the storm water drainage system could allow water to flow into the building.
3. Discharge the water to an approved location above ground or into a sump pit, dry well, or a trapped area drain.