A bottom drain can be said to be one of the most important parts of a pond installation, in that it’s integrity is paramount to the success of the entire project.
The first step in a proper pond is ensuring that waste products are efficiently removed for processing by the filtration system. The application of bottom drains coupled with skimmers is essential in this regard.
The Rhino drain series have been designed to make installations easy, with a dependable seal to protect against
hidden leaks, which can happen with most other drain flanges.
Rhino Series I drains are vertical discharge in your choice of 3" or 4" pipe. The Rhino II drains are 4" ported, horizontal discharge.
Air pump to run Two Rhino Drains or any Bottom Drain with an Air Difuser. For air drain... the size of the air pump is a function of the depth that the drains are set.
A good rule is "20lpm per meter of depth".
1 meter = 3.3' = 20 lpm for one Rhino Drain--Double the depth for Two Rhino Drains.
2 meters = 6.6' = 40 lpm for one Rhino Drain--Double the depth for Two Rhino Drains.
3 meters = 9.9' = 60 lpm for one Rhino Drain--Double the depth for Two Rhino Drains.
4 meters = 13.2' = 80 lpm for one Rhino Drain--Double the depth for Two Rhino Drains.
Now then, if he runs two air drains, you need to double the depth.
2 drains, each at 2 meters = 4 meters total = 13.2' = 80 lpm