Home   |   About Us   |   Contact Us   |   Trade Prices   |   Delivery   |   View Checkout   |   
Creative Pumps Thawte Logo
bottom-footer

Choosing your pump for Multi-use spillway
(Different flow rates required for Projecting sheet & sheet descent)

projecting sheet flows

Projecting sheet mode (Maximum 75mm projection from the wall)

 
PUMPS: How to choose : A projecting sheet spillway requires a flow of at least 850 Litres per hour for every 100 mm of spillway width. While a sheet descent sheet spillway requires a flow of at least 350 Litres per hour for every 100 mm of spillway width. This flow rate is measured at the spillway, therefore in choosing the pump, the distance* between the surface of the water and the spillway is a factor that only you will know.  We have therefore made a number of suggestions below based on about 1.0m mounting, covering a variety of price points. The (list starts with the best quality and works right). *The higher the water is being pumped, the larger the pump must be, also on 2 and 3 inlet spillways the flow must be higher because of the tee that is required in the plumbing.

Potential pumps*
When used as a sheet descent (softly down the wall)
Spillway
length
Min flow rate required at the spillway -
litres per hour
Pump
Location
Based on about 1000mm mounting height**
** Head, the distance between the top of the water in the pond and the mounting height of the spillway.
300 1,050 Inside pond Pondmate 1500 Oase Neptun 2000
Outside pond Pondmate 1500 Oase Neptun 2000
600 2.100 Inside pond Pondmate 3500 Laguna MaxFlo 4000 Oase Neptun 3000
Outside pond Pondmate 3500 Oase Neptun 3000
900 3,150 Inside pond Pondmate 4800   Oase Neptun 4000
Outside pond Pondmate 4800  Oase Neptun 4000
1200 4,200 Inside pond Pondmate 6000   Laguna Maxflo 5000  Oase Neptun 6000
Outside pond Pondmate 6000  Pondmate 6000DWP
1500 5,250 Inside pond Pondmate 6000 Laguna MaxFlo 7500 Oase Neptun 6000
Outside pond Pondmate 6000  Oase Neptun 6000 Pondmate 6000DWP

Potential pumps* When used as a projecting sheet (sheer descent - not touching the wall)

Spillway length Min flow rate required at the spillway -
litres per hr
Pump
Location
*Based on about 900mm mounting height**
**Head, the distance between the top of the water in the pond and the mounting height of the spillway.
300 2,550 Inside pond Pondmate 3500 Laguna Maxflo 5000 Oase Neptun 4000
Outside pond Pondmate 3500 Oase Neptun 4000
600 5,100 Inside pond Pondmate 6000 Laguna Maxflo 7500 Oase Neptun 6000
Outside pond Pondmate 6000 Oase Neptun 6000
900 7,650 Inside pond Pondmate 8500 Laguna Maxflo 9000 Oase Neptun 9000
Outside pond Pondmate 8500 Oase Neptun 9000
1200 10,200 Inside pond Laguna Maxflo 11000 Pondmate 15000 DWP  Oase Neptun 12000
Outside pond Pondmate 15000 DWP Oase Neptun 12000
1500 12,750 Inside pond Pondmate 15000DWP  Laguna Maxflo 16000
Outside pond Pondmate 15000 DWP
Aussie says Aussie says

 

**Head, the distance between the top of the water in the pond and the mounting height of the spillway.
Tip 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 100 mm.  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. Click here

 Red arrows  Spillway plumbing kits available - Click for options