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Pump Wells Print E-mail

The Pump's Location
If a pump is to extract sediment from the pond it has to aspirate from the deepest point, because only this way the source of nutrients for algae is efficiently removed.
NaturaGart offers several alternatives to reach this sediment. The best option is to build a filtering trench. That way the pump is supplied mostly with clear water.

The Pump at the Bottom of the Pond
This is the most frequent solution, but also the worst. If you want to clean the pump you have to pull it out with pipes and electrical cable and all. This can cause damage to plants and underwater decoration. Under these circumstances it is also impossible to backwash the pipe. Be it also mentioned that apparently sturgeons don't tolerate the magnetic field of the pumps.
Pumps are soon covered with a layer of sediment and algae and are nearly impossible to service inside the pond.
The Pump in the Pump Well
The pump is installed inside a well from which normally two pipes lead to the deep end of the pond. Through these pipes sediment is extracted. The method of Target Suction Technology is explained here.
The important advantage: You easily can regulate flow rates that take effect a few metres away from the shore. 
For this method the NaturaGart standard pumps can be used. From a safety point of view, however, it is expected that the system be disconnected from the mains, before touching the water.
An alternative is to use a 12 Volt pump. Due to the additional transformer this pump is about 50% more expensive, but you have no limitations as to water contact.
The pump well is the perfect solution in order to aspirate from various points with just one pump. At the same time, or on a different schedule, skimmers can be used. The standard model comes with 3 gate valves and two blind plugs.
Internal Pump Well
The pump sits in a pump well at the end of the filtering trench. The pre-filter is slightly bent upward to avoid it from sucking in mud. If the well is disguised with stones it is hardly visible. Such a location is safer than the pump inside the pond, but here, too, water contact is only allowed if you use a 12 Volt pump.
Photo from a construction site: The 62cm tall well was installed at the end of the filtering trench.
After installation is finished neither well nor pump nor pre-filter are visible.
External Pump Well
This is the best solution, but there are a few caveats to consider. This method requires that the liner be extended beyond the pond under the water level. NaturaGart has developed a system that fulfills all regulatory requirements. Instruction manuals are supplied only with the building materials.

Read more about pump wells here
A 1 x 1m pump well for two pumps, two suction pipes and 5 returns. You see: Pump wells should not be built too small.
The well is made in stonework. You should have the instructions doe the construction details before you start. The well usually has a surface of 1 x 1m and is about 60cm deep. It is often built too small.