1 - If your water pressure is too low it can take 30 minutes to fill a regular bathtub as opposed to 10 minutes – with the right booster solution.

At 3 bar at a tap we fill a 300 l bathtub in 10 min. This means the flow is 1800 l/h. Kv coefficient (l/h at 1 bar) of the tap is 1040 l/h. (1040 l/h = 1800 l/h / sqrt (3 bar/ 1bar)).

If pressure at the tap drops to 0.3 bar, we would have flow of 570 l/h which means it will take more then 30 min to fill in tub. (570 l/h = 1040 l/h * sqrt (0.3 bar/ 1 bar)).

Source:

Grundfos DBS internal calculation by boosting expert

2 - Waiting for hot water can result in a 3-person household wasting 16,000 litres of water in a year – enough for filling 66 bathtubs

Source:

https://www.grundfos.com/legal/sources/domestic-building-services

3 - Within a year of installing a GRUNDFOS COMFORT PM recirculation solution, an average household can save roughly 16,000 litres of water – enough for 66 bathtubs

Source:

https://www.grundfos.com/legal/sources/domestic-building-services

4 - On average, a person waits 20 seconds, five times a day, for faucet water to heat up. That’s up to 10 litres of water down the drain every day.

Source: 

Number of times a person is waiting a day for water to get hot at a faucet is estimated to be 5

https://energysavingtrust.org.uk/sites/default/files/reports/AtHomewithWater(7).pdf  

5 - In an average 3-person household, that can add up to as much as 16,000 litres of water a year.

Source:

https://www.grundfos.com/legal/sources/domestic-building-services

6 - Efficient technology reduces energy by app. 40%

Source:

Grundfos DBS boosting expert