IS 2326:1987 is the Indian Standard (BIS) for automatic flushing cisterns for urinals (other than plastic cisterns). This standard specifies the requirements for materials, manufacture, nominal capacities, dimensions, and testing of automatic flushing cisterns used for urinals. It explicitly excludes cisterns made of plastic materials.
Automatic Flushing Cisterns for Urinals (Other than Plastic Cisterns)
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Nominal Flush Capacity | 5, 10 or 15 litres | Typically 1.0 to 2.0 litres per flush for the whole system; cistern capacity is not specified, only performance. | EN 13407:2018 |
| Activation Method | Automatic siphonic action (continuous, timed cycle) | Not specified; typically sensor-activated, manual push-button, or timed electronic valve. | EN 13407:2018 |
| Permitted Cistern Materials | Cast iron, vitreous china, pressed steel, copper alloys. Plastics are explicitly excluded. | Plastics, vitreous china, stainless steel. Any material that passes performance tests is generally acceptable. | General practice under EN/ASME standards |
| Discharge Test (Time for 90% volume) | Not more than 7 seconds (for 10 L cistern) | 7 to 9 seconds | BS 1876:1972 |
| Water Supply Connection | Specifies BSP threads, e.g., G 1/2 for the inlet pipe. | Specifies standard pipe threads like NPS or NPT, e.g., 1/2-14 NPT. | ASME A112.19.2 / General US Practice |
| Cistern Body Thickness (Vitreous China) | Not less than 6.0 mm | Not specified prescriptively; must pass structural integrity and load tests. | ASME A112.19.2-2018 |