ᐅ Rainwater Harvesting Cistern for Garden Irrigation – Which Pump Should I Use?
Created on: 9 Sep 2020 14:49
D
DerGuteTon
Greetings!
I am gradually starting to plan the garden irrigation for my soon-to-be-completed house. For now, I want to keep it simple and non-smart: a cistern (6,000 liters) is installed underground, and I plan to water the garden conventionally using a pump and garden hose. The farthest lawn area will be reachable with about 35 to 40 meters (115 to 130 feet) of hose length. The cistern is located at the lowest point, about 2.50 meters (8 feet) underground.
Now I am facing a confusing variety of possible pumps: suction pump, dirty water pump, submersible pump, garden pump, deep well pump... several thousand liters per hour, various pressure ratings in bar... Does anyone have good advice?
I am gradually starting to plan the garden irrigation for my soon-to-be-completed house. For now, I want to keep it simple and non-smart: a cistern (6,000 liters) is installed underground, and I plan to water the garden conventionally using a pump and garden hose. The farthest lawn area will be reachable with about 35 to 40 meters (115 to 130 feet) of hose length. The cistern is located at the lowest point, about 2.50 meters (8 feet) underground.
Now I am facing a confusing variety of possible pumps: suction pump, dirty water pump, submersible pump, garden pump, deep well pump... several thousand liters per hour, various pressure ratings in bar... Does anyone have good advice?
S
Stefan2.8417 May 2021 16:03How do you seal the opening of a cistern through which I will run a 32mm (1.25 inch) PE pipe and an electrical cable? Are there any suitable lids for this? Also, would it make sense to install an additional KG pipe through which I would run the water pipe to allow easier replacement later on?
S
Stefan2.8421 May 2021 09:59I need to ask another question: I would like to have a pressure switch in the pump. However, I also want to install a drain valve. Couldn't that create a vicious cycle where the pump keeps turning on every time it drains?! Or is a drain valve not necessary? Maybe someone can also answer my question from the previous post...
Thanks and regards
Thanks and regards
S
Schwabe2321 May 2021 10:30Stefan2.84 schrieb:
I need to ask another question: I would like to have a pressure switch on the pump. But I also want to install a drain valve. Wouldn’t that create a kind of vicious circle where the pump keeps turning on when the system is draining?! Or is no drainage necessary? Maybe someone can also answer my question from the previous post...
Thanks and regards…You need drainage to protect the piping system from freezing. Simply equip the pump with a switch or just unplug it when you want to drain the water. 🙂 You will probably only drain the pipes and the control system once a year.S
Stefan2.8421 May 2021 10:32At what point does the valve open? It is, of course, only intended to empty the system for the winter.
S
Schwabe2321 May 2021 10:37Stefan2.84 schrieb:
At what pressure does the valve open? It’s obviously only meant to keep the system empty during winter.For Gardena, it opens at 0.2 bar. The valve is located before the other valves. The pressure in the system stays stable and only drops to the pump’s activation pressure, which is usually around 1.3 bar.S
Schwabe2321 May 2021 10:43… you can also do without a valve, open the pipe in the cistern, and drain the system using a foot pump or an air compressor. Just don’t forget to do it.
Similar topics