Case Study: How a Commercial Basement Restroom Was Installed Without Excavation Using SFA’s Sanicubic 2 GR
Retrofitting drainage infrastructure in completed commercial buildings is rarely straightforward, especially when new restroom facilities are required below sewer level. In this project, SFA India delivered a practical and non-invasive solution for a basement driver restroom using the Sanicubic 2 GR sewage lifting station. Designed for high-demand commercial environments, the system enabled the connection of multiple toilets without excavation, structural alteration, or disruption to daily operations.
Commercial buildings are not always designed with every future requirement in mind. When a facilities team needs to add a driver restroom in a basement parking area years after construction, the building's original drainage infrastructure rarely cooperates. This case study details how SFA India resolved exactly that challenge using the Sanicubic 2 GR, a heavy-duty grinder lifting station that delivered a fully functional, multi-toilet basement restroom with no excavation and no structural interference.
The Challenge: Basement Toilets Below the Sewer Line
A commercial building required a dedicated restroom facility in its basement parking area, connecting 3 to 4 toilets for daily use by logistics and driver personnel. The immediate problem: the basement sat below the building's main sewer line, making conventional gravity drainage impossible without digging through the completed slab.
Building management imposed clear constraints. No major excavation or core-cutting was permitted in the active parking structure. The solution had to handle high-usage, peak-load conditions reliably, and installation had to be completed with minimal civil work.
The Solution: Sanicubic 2 GR Lifting Station
SFA India specified the Sanicubic 2 GR, a floor-standing commercial sewage lifting station designed for exactly these conditions. The unit was installed in the basement and connected directly to all toilets in the restroom facility. Its dual Pro X K3 grinder pumps collect and macerate incoming sewage water, then discharge it upward through a 50 mm pipe to the sewer connection above, no pit required, no gravity drainage needed.
The dual-motor configuration was essential for this application. With multiple toilets in a high-usage environment, the system needed to handle simultaneous flushes without faltering. The two motors alternate during normal operation and activate together during peak inflow, ensuring continuous performance even during the busiest shift periods. If one motor ever requires servicing, the other operates independently as a built-in failsafe.
The IP68-certified motors provided added assurance for the basement environment, where moisture levels demand more than a standard motor rating. An integrated audible and visual alarm system allows the facilities team to monitor the unit remotely, with immediate notification if intervention is needed. Installation required no excavation, no pit, and no prolonged shutdown of the parking structure.
About the Sanicubic 2 GR
The Sanicubic 2 GR is a heavy-duty, free-standing sewage lifting station available in four versions, covering lifting heights from 20 to 39 metres. Its Pro X K3 dilaceration system grinds all solid waste before discharge, eliminating blockage risk in long discharge runs, critical in a multi-toilet commercial setting.
With a 150-litre tank, a maximum flow rate of 17 m³/hr, and five inlets including two low-level DN 100 mm side inlets, the unit connects directly to multiple toilets at floor level without additional pipework elevation. Its removable motor design keeps maintenance straightforward.
| Specification | Detail |
| Installation Type | Floor-standing |
| Motor Configuration | Dual-motor (Pro X K3 grinder) |
| Lifting Height | 4 versions: 22 m to 39 m |
| Max Flow Rate | 17 m³/hr |
| Tank Capacity | 150 litres |
| Number of Inlets | 5 (incl. 2 low DN 100 mm side inlets) |
| Discharge Pipe Diameter | 50 mm |
| Motor Protection | IP68 |
| Alarm System | Audible and visual, with remote-control box |
Key Benefits
- No excavation: Floor-standing design requires no pit, no core-cutting, and no structural modification
- Dual-motor reliability: Alternating motors distribute wear; both activate under peak load; one provides standby backup
- IP68-certified motors: Rated for high-moisture basement environments
- High-capacity performance: 150-litre tank and 17 m³/hr flow rate handle sustained multi-toilet usage
- Pro X K3 grinder technology: Eliminates blockage risk in long discharge pipe runs
- Remote monitoring: Audible and visual alarms with control box for facilities team oversight
Applications
The Sanicubic 2 GR is the right specification wherever sewage drainage is required below sewer level: basement restrooms, underground parking structures, commercial kitchens, hotels, retrofit projects where structural modification is not permitted, and large residential properties with remote or below-grade bathrooms.
About SFA India
SFA India is part of the global SFA Group, with over six decades of expertise in pump solutions for residential, commercial, and institutional applications. As trusted pump manufacturers in India, SFA products are specified by MEP consultants, facilities managers, and contractors for sewage lifting, grey water drainage, and condensate management nationwide. The Sanicubic 2 GR is manufactured to European quality standards and backed by SFA India's full technical support network.
Explore the Sanicubic 2 GR here or contact SFA India!