Garden Fountains: Pump Performance and Water Loss in Summer
You are planning a fountain for your garden and wondering which pump you need and how much water actually evaporates in summer? The correct sizing determines whether the water feature gurgles harmoniously or disappoints. Equally important is the question of how often you need to refill in midsummer. This guide provides you with concrete reference values for pump performance and water loss, so that your fountain functions reliably.
What Pump Performance Does a Garden Fountain Require?
The pump's performance depends on the height the water must overcome and the desired flow rate. For a classic garden fountain with a spray height of 50 to 80 centimeters, a pump with 1,000 to 2,000 liters per hour is sufficient. If the water is to rise higher, for example with a multi-tiered fountain with 150 centimeters total height, 3,000 to 4,000 liters per hour make sense. Pay attention to the delivery head in the product description: a pump with 2,000 liters per hour at zero meters height often only manages 1,200 liters at one meter delivery head. Therefore, always plan a reserve.
How Much Water Evaporates in Summer?
Water loss through evaporation varies depending on temperature, humidity, and wind strength. On a hot summer day with temperatures above 30 degrees, a medium-sized Garden Fountains with a water surface of about one square meter loses between two and five liters per day. For smaller fountains with 50 centimeters diameter, it is one to two liters daily. In addition to evaporation, water is lost through splash water, especially when wind carries the fine droplets out of the basin. Calculate a weekly refill requirement of 10 to 20 liters for an average garden fountain during peak season.
What Basin Size Prevents Frequent Refilling?
A sufficiently dimensioned water basin reduces the effort considerably. For a fountain with 80 centimeters height, the basin should hold at least 40 liters, preferably 60 to 80 liters. This way, the system survives even a week's holiday without drying out. Shallow bowls with large surfaces evaporate more water than deep, narrow basins. A basin with 60 centimeters diameter and 20 centimeters depth holds around 55 liters, which is sufficient for most locations. Check the water level every three to four days and refill before the pump runs dry.
Location and Material Choice Influence Water Loss
A fountain in full sun evaporates significantly more water than in partial shade. If possible, choose a location that is shaded for a few hours at midday. This not only conserves the water supply but also prevents strong algae formation. Stone fountains made of granite or marble heat up less than metal or dark plastics, which also slows evaporation. A cover for the night or during longer absences can be useful, but is not necessary during operation. Integrate the fountain harmoniously into your Garden Furniture, Stoves and Decoration, so that it fits optically and functionally into the overall design.
Automatic Refilling as a Comfortable Solution
For those who do not want to constantly monitor the water level, there are automatic refill systems. A float valve, as also used in toilet cisterns, keeps the level constant. You need a water connection near the fountain for this. Alternatively, you can set up a storage container with 50 to 100 liters and connect it to the fountain by gravity or small auxiliary pump. This extends the intervals between manual refills to two to three weeks. Ensure that the system is frost-proof if the fountain runs year-round.
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