Thursday, April 15, 2010
Jet Nozzle
Submersible pumps
External pumps
Select the right pump for the job
Selecting the right pump is important. Most pumps are designed for a specific purpose e.g. pond, waterfall, drainage etc. Check with salesman that the pump is the right pump for your application.
Pump Selection
- The head of the water feature
Waterplant Bio
Tuesday, February 2, 2010
Don’t let the sun go down on your water feature.
During the day water features and garden ponds add a new dimension and tranquillity to gardens, but once the sun sets most are hidden until the sun rises again.
This need not be the case and by adding lighting to your water feature and pond you can bring out new qualities to them according to the amount, colours and positions of your lighting. These new contrasts will vary as the garden is transformed by dusk turning into night, creating an entirely different atmosphere.
There is a wide range of low voltage underwater and garden lighting available that is both safe and easy to install.
The key to placing water feature and landscape lighting is restraint. Lighting up the entire area is far less affective than using the light sparingly and highlighting certain parts of the water feature and surrounding plants. You want to try and let the light throw shadows over rocks, plants and running water, rather than directly onto the focal point or water surface. The water surface will become a dark mirror, reflecting the water feature and plants when the light is shone indirectly.
Under water lighting can produce some dramatic effects. By placing a light directly under a fountain nozzle you will add a whole new dimension. Try to place the light so that it shines upwards into the spray if possible attaching the light to the nozzle. Placing a light behind a waterfall or water curtain is also very dramatic.
In ponds and features with fish, underwater lighting is not recommended as it confuses the fish as they will try to swim with the light to there backs.
The addition of a ‘mist maker’ to your water feature can also be very effective when combined with lighting, creating a sense of theatre as the mist rolls over the surface and edges of your feature & drifts across the light beams.
In many ways a water feature can be even more effective at night and by adding lighting you will enjoy it long after the sun has set.
Don’t let the sun go down on your water feature.
During the day water features and garden ponds add a new dimension and tranquillity to gardens, but once the sun sets most are hidden until the sun rises again.
This need not be the case and by adding lighting to your water feature and pond you can bring out new qualities to them according to the amount, colours and positions of your lighting. These new contrasts will vary as the garden is transformed by dusk turning into night, creating an entirely different atmosphere.
There is a wide range of low voltage underwater and garden lighting available that is both safe and easy to install.
The key to placing water feature and landscape lighting is restraint. Lighting up the entire area is far less affective than using the light sparingly and highlighting certain parts of the water feature and surrounding plants. You want to try and let the light throw shadows over rocks, plants and running water, rather than directly onto the focal point or water surface. The water surface will become a dark mirror, reflecting the water feature and plants when the light is shone indirectly.
Under water lighting can produce some dramatic effects. By placing a light directly under a fountain nozzle you will add a whole new dimension. Try to place the light so that it shines upwards into the spray if possible attaching the light to the nozzle. Placing a light behind a waterfall or water curtain is also very dramatic.
In ponds and features with fish, underwater lighting is not recommended as it confuses the fish as they will try to swim with the light to there backs.
The addition of a ‘mist maker’ to your water feature can also be very effective when combined with lighting, creating a sense of theatre as the mist rolls over the surface and edges of your feature & drifts across the light beams.
In many ways a water feature can be even more effective at night and by adding lighting you will enjoy it long after the sun has set.
THE RIGHT PUMP FOR THE JOB
With all the different types of pumps available on the market today it can be a confusing and frustrating task to select the right pump for your water feature or pond. We will take a look at the 2 main types of pumps available and what you will need to look for when selecting the pump.
Submersible pumps
These are most commonly used in water features and smaller ponds. The pump is completely submerged in the water. The suction of the pump is usually positioned on the side or bottom of the pump. The water is then sucked through the pump and out through the outlet through a pipe or nozzle circulating the water. The smallest submersible pumps available will pump a flow rate of +/- 200 litres per hour and a height of 25cm while the larger pumps will deliver 19000 litres an hour and pump a height of 10 meters. Submersible pumps are the most economical pumps to run.
It is South African law that all submersible pumps used outdoors are fitted with an earthed 3-core 10-meter cable. A submersible pumps suction area needs to be cleaned regularly to avoid the impeller becoming blocked, causing the pump to burn out.
External pumps
The most common external pump used on water features is the swimming pool pump. These are ideal for larger water features and ponds that require a high flow rate of water. There are various sizes of pool pumps available with smallest delivering 5000 litres per hour and the larger pumps delivering up to 40 000 litres per hour.
You will need to draw the water from a point in the feature, usually a bottom drain or weir. The water is sucked through pipe to the pump and then pumped back to the pond or feature. It is important not to install the pump to high above the water level (Max 1.5 meters).
Pump Selection
Pipe diameter is very important and will greatly affect the flow of a water feature. The smaller the diameter of the pipe, the lower the eventual flow will be. When in doubt always go for a larger diameter pipe.
You will need the following information when selecting a pump for a water feature or pond:
- Water feature height
- Flow required at the height
- The volume of the pond
- The size (diameter) of the pipe
- The width, length and depth of any streams, waterfalls or over flows.
With the above information your local pump expert should be able to help you select the correct pump.
Each pump will have a graph that will show you the height the pump will reach and the flow it will deliver. When in doubt it is recommended to go for a larger pump as the flow can always be reduced if necessary.
