Rainwater Harvesting

Discover how a rainwater harvesting system can reduce water use, save money on your water bill and create a more sustainable living space. 

Unlock the power of a home rainwater harvesting system 

Washing machines, toilet flushes and garden irrigation. Your home uses a lot of clean water, but with a rainwater harvesting system, you can replace some of this water with rain you collect. All you need is a solution that can boost and transport the water into your home efficiently. Our rainwater harvesting solutions can help you reduce water use, save on your water bill and create a more sustainable living space.

Why choose a rainwater harvesting system from Grundfos? 

13,000 gallons 

of water saved annually in the average home 


of household water replaced by rainwater


saved on the average homeowner's water bill

What can the right rainwater harvesting system do for you?

Noisy, inefficient rainwater harvesting systems are a common headache for many homeowners. But with our all-in-one rainwater harvesting pumps, you can experience the comfort of a quiet, reliable and uninterrupted rainwater flow into your home. 

Saves you water

Tap into your home’s existing water resources and reduce your reliance on main water supplies. With a rainwater collection system, you can save 35% on your current water usage, which can add up to a 50% reduction on your water bill.

The sustainable choice

Stop wasting precious drinking water resources in your home and start collecting, storing and reusing rainwater for flushing toilets, watering gardens, or even washing clothes.

Fit for comfort

The SCALA1 is a rainwater harvesting pump that’s easy to install, and once installed, it just runs - no need for additional handling, whether installed above or underground.

Choose the right rainwater harvesting system for your home

Finding the rainwater harvesting system that fits your home and living situation can be a challenge. You also need to be aware of the local regulations and guidelines that apply in your area. We recommend that you contact your local installer to help you find the optimal rainwater harvesting solution for you. 

Note: professional installer companies are randomly searched and displayed based on geographical location and not approved or certified by Grundfos

The Grundfos SCALA1

Take a look at one of our most popular pumps used as a rainwater system for homes. The SCALA1 rainwater pump is compact and efficient. It can boost and transport water into your house from a rainwater tank placed above or under ground - or alternatively from the mains water supply, if rainwater reserve is low.

Delivers all the water you need

With a capacity of 30 gpm, SCALA1 delivers all the rainwater you need to nourish your garden, keep your toilets flushing properly, and more.

Get perfect pressure – always

Don’t settle for poor water pressure. Delivering up to 10 bars of pressure, SCALA1 provides consistent rainwater flow through your pipes, no matter how many appliances you’re using at the same time.

Enjoy uninterrupted performance

Tired of disruptions when you least expect them? SCALA1 is a self-priming pump that starts and runs on its own, even when the suction line has no water, ensuring safe, continuous rainwater flow and comfort at all times.


Length: 46.6 cm, Height: 31.6 cm, Width: 20.2 cm and Weight 24-30 lbs depending on model.

Note: dimensions are indicative for pump type – but may vary on different models

Our most popular rainwater harvesting pumps

"Grundfos is a very quiet pump compared to my old pump. I installed it on my roof and I can hardly hear it."

Haris, homeowner, Malaysia