Yes, with proper filtration and treatment (UV disinfection, activated carbon, or reverse osmosis). Grundfos SB and SBA pumps are certified for potable water, but purification systems must be added for direct human consumption. For uses such as irrigation, cleaning, or toilets, no additional treatment is needed.

A 100 m² roof in a region with 600 mm of annual rainfall can collect about 60,000 liters of water. Accounting for evaporation and overflow losses (20%), approximately 48,000 liters can be used annually, covering up to 50% of non-potable domestic consumption. The formula is: Area (m²) x Rainfall (mm) x 0.8 (loss coefficient).

The Grundfos SBA is an "all-in-one" solution with an integrated pressure controller and dry-run protection. The Grundfos SB requires an external controller (PM1 or PM2) but offers more flexibility for custom installations. Both have the same hydraulic performance (flow rate, head, power).

Filters should be cleaned every 3-6 months, the tank inspected every 1-2 years for sediment or leaks, pump operation verified, and the tank kept tightly sealed to prevent pests and algae. Grundfos pumps require very little maintenance thanks to their robust design.

Yes, but the tank and pipes must be thermally insulated in climates where temperatures drop below 0°C to prevent freezing. Grundfos pumps can operate with water between 0°C and 40°C. If the tank is buried, the ground acts as a natural insulator.

Although the initial installation can cost between 1,000 and 5,000 euros (depending on tank capacity and complexity), savings on the water bill offset the investment in 5-10 years. An average family can save hundreds of euros annually, plus the benefits in appliance maintenance.

Yes, it is completely legal to collect rainwater for personal use in Catalonia and Spain. However, the Building Technical Code (CTE) DB-HS 4 must be complied with if used for toilets or washing machines, requiring an independent network and proper signage. No special permit is required for domestic use.

For an average home with a 100-150 m² roof, a 3,000-5,000 liter tank is adequate. The ideal capacity depends on the catchment area, local rainfall, and expected consumption. It is recommended to size it to cover 2-3 weeks of consumption without rain.

No, Grundfos SB and SBA pumps are extremely quiet. Being submerged in the tank, the water acts as an acoustic insulator. The noise level is practically imperceptible, ideal for residential environments. They will not bother you day or night.

The Grundfos SBA has built-in dry-run protection: it stops automatically and attempts to restart periodically. The Grundfos SB requires an external controller (PM2) or level switch to provide this protection and prevent motor damage.

Yes, rainwater is ideal for the washing machine. Being soft water (without limescale), it requires less detergent and fabric softener (up to 50% less), extends the machine's lifespan, and improves washing quality. Basic filtration and, optionally, UV disinfection are recommended.

To prevent odors: 1) Install efficient filters at the inlet, 2) Keep the tank tightly sealed and in the dark (prevents algae), 3) Clean the tank every 2-3 years, 4) Ensure good ventilation with appropriate valves, 5) Use systems that extract water from the surface (Grundfos floating filter).