Advantages of multi use spillways:
1) If you are not sure how aggressive you want the water flow, purchase the
larger pump and by adjusting flow you can experiment.
2) During the day or while having a party, set the pump for projecting
sheet, then after dark turn back the flow for a soft and gentle water sound
for complete relaxation.
Disadvantages: They do not do either job as well as a purpose designed
spillway such as
Cascading Sheet descent Projecting Sheer descent spillways.
**What is a Cascading sheet descent spillway? A stainless steel box with a delivery spout is mounted in a wall, water
flows softly from the spillway and runs down the wall face into the pond or pool. Sheet descent units have been
designed with a multi chamber internal baffle system to promote even flow over the spillway.
***What is a projecting sheer descent spillway? (also known as sheer descent
water feature) stainless steel box with a delivery
spout is mounted in a wall, a large volume of water passing through this
special unit producing a solid sheet of water that projects away from the
wall. The sheet of water does not touch the wall, but goes directly into the
Hint 1:If being used as a projecting
sheet effect, never mount higher that 900mm above the water. The further the water
drops, the narrower it becomes due to surface tension. The drop in the photo's above is .9m to give you an idea. Another way to understand this
tapering effect is that for every 50cm of drop, the width of the sheet of water narrows by about 10 cm.
After about 90cm of drop the sheet starts to break up.
Hint 2: Any elbows or tees in the system will reduce flow.
On the 2
inlet model spillways, it may be desirable to use two pumps, this will avoid
the need for a tee.
Hint 3: Glass .. When water is run
down glass, to improve water flow and maintain it's full width you should
angle the wall between 2 to 5 degrees
Hint 4: Acrylic .. When water is run down Acrylic, to improve water flow and maintain it's full width you
should angle the wall between 5 to 7 degrees
Hint 5: How to neatly get the electrical cable from the pump and the water tube out
of the pond cleanly and allow for service.