Whether you run a 50-person office, a 500-student school, or a 100-room hotel, your water purification requirements are fundamentally different from a household. This guide walks you through everything you need to know to buy the right commercial RO plant in India in 2026.
Understanding LPH: How Much Capacity Do You Need?
LPH stands for Litres Per Hour — the rate at which a commercial RO plant produces purified water. To calculate your requirement: multiply the number of people by average daily water consumption per person. Office workers: 3–5 litres per person per day. School students: 2–3 litres per day (drinking only). Hotel guests: 8–15 litres per person per day (drinking, cooking, kitchen use). Hospitals: 15–30 litres per patient per day.
For a 200-person office needing 4 litres/day per person, you need 800 litres/day. With an 8-hour workday, that's 100 LPH minimum capacity. Alkin recommends 20–30% overcapacity to handle peak demand and filter degradation over time.
Key Components of a Commercial RO Plant
Pre-treatment: Includes sediment filters (removing suspended solids), activated carbon filters (removing chlorine and organics), and optionally water softeners (for high-hardness input). Pre-treatment extends RO membrane life significantly.
RO Membrane Array: Commercial plants use multiple RO membrane elements in series/parallel configurations. Membrane quality and rejection rate are critical — look for minimum 97% TDS rejection with NSF-certified membranes.
High-Pressure Pump: Moves water through the RO membranes. Energy efficiency is important — a well-designed pump system reduces electricity costs significantly in 24/7 operation.
Post-treatment: UV sterilization, activated carbon polishing, and optionally a mineralization/alkalinization stage for drinking water applications.
Storage and Distribution: Stainless steel storage tanks with level controllers, pressure pumps for distribution across multiple floors, and dispensing points.
Capacity Guide by Business Type
Small office (20–50 people): 25–50 LPH system, Rs 20,000–40,000. Medium office (100–200 people): 100–200 LPH system, Rs 40,000–80,000. Large office/school (500 people): 500 LPH system, Rs 1,50,000–2,50,000. Hotel (100 rooms): 500–1000 LPH with kitchen purification, Rs 2,00,000–5,00,000. Factory/industrial: Custom engineered, quote on request.
What to Look for in After-Sales Service
Commercial RO plants are critical infrastructure — downtime directly affects operations. Ensure your supplier offers: response time guarantee (4–8 hours for emergency service), AMC (Annual Maintenance Contract) with scheduled preventive maintenance, spare parts availability (filters, membranes, pumps) within 24 hours, and remote monitoring capabilities for 24/7 system status.
Alkin Water provides commercial RO plants from 25 LPH to 6,000 LPH with pan-India service support and guaranteed response times. Request a site survey and quotation for your business today.
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