Pool and Spa Care - Just 5 minutes a day

Pool and Spa Care - Just 5 minutes a day

Solar Pumping - Amazing technology that is simple to use

Solar Pumping - Amazing technology that is simple to use

Pump Repairs and Service - All types, All Brands, All Areas

Farm water infrastructure - Drought proof farming for the long term

Residential water systems - Make your home an oasis

Travelling irrigators - better returns from your investment

Travelling irrigators - better returns from your investment

Parks and Gardens - Safety and Compliance

Parks and Gardens - Safety and Compliance

Latest Posts

How much air should I have in my pump pressure tank?

Irrigear Goulburn
We get asked this question all the time and you would think that there would be a simple answer. We really wish there was a simple answer, because the correct answer is neither simple nor brief. The correct air pressure for a pressure tank is 5% less than the cut in pressure setting of the pump, measured with the pump off and the water pressure relieved.

Let’s simplify that a little, and add a bit of theory. The purpose of the pressure tank is to allow the pump system to discharge flows of water less than that of the pump. Let’s say that our pump delivers 50 litres per minute, but the shower only uses 20lpm. Without a pressure tank the pump would need to start and stop (very) rapidly to regulate itself to 20lpm. A pressure tank accepts the extra 30lpm until the pressure builds up to the cut out pressure and the pump switches off. The pressure tank can continue discharging until the cut in pressure is achieved and the pump starts again. Additionally, the pump will not have to start every time someone flushes a toilet or gets a glass of water. So, the larger
the pressure tank, the longer the cycle between starts.

But how much air pressure should I have in the pressure tank? If you measure the air pressure in figure 1 it will show 20psi, and in figure 2 it will show 40 psi. But these are false readings as the air is being compressed by the water. To measure the air pressure, you have to switch off the pump, open a tap to let the water pressure off, and then measure the air pressure. In the example pics, the ideal pressure would be 18psi (5% less than the cut in pressure of 20psi). If the cut in pressure was 30psi, the air pressure should be 27psi, 40psi - 36psi and so on.

When the air pressure is right the pressure tank will still contain a small amount of water when the pump starts, ensuring a smooth flow of water. If the air pressure is too low, the tank will always be too full of water and the pump will cycle more rapidly. If there is too much air the water will discharge completely before the pump starts, causing a brief interuption in water flow and a sudden surge when the pump cuts in. You should check the air pressure very 6 months.

4.16kW Lorentz Solar Pump System at Gurrundah

Irrigear Goulburn
Our client, west of Goulburn, required over 100,000L per day to supply his stock and domestic reticulation system. Drawing from a natural spring the system supplies the homestead and a number of cottages as well as a large stock water reticulation system. For some time this had been done with a single impeller petrol pump, running almost constantly throughout summer. This was very inefficient  in terms of labour and running cost.  We were able to size and quote this system, specific to his requirements, and then install and commission the system soon after.

The Lorentz solar pump system comprises a PS2-4000 submersible pump and motor, along with its associated controller (the brains of the outfit). This is supplied directly by 16 x 270 Watt Risen solar panels mounted on a Clenergy PV Terrace. We used earth anchors to secure the footings. After the earthworks has been completed, the system was installed by two of our technicians in less than 2 days.

Peak average flow is over 280L per minute, and 145,000L per day, with a yearly average of 127,000L per day. No labour requirements and no ongoing operational costs.




When is the best time to irrigate your lawn?

Irrigear Goulburn
How often do we get home from work, look at the back lawn or vege garden and think... I should crack a tinnie and give that some water. Well don’t. Actually the tinnie is OK, and after work is the perfect time for that, but watering the garden - you should be doing that in the morning.
Morning irrigation lets the leaves dry out during the day, which prevents mould and fungus growth. Watering during the heat of the day, when evaportation rates are high can also lead to mineral deposits which can burn leaves and sensitive plants. You will probably find that it is less windy in the morning as well, which means the water is going where it should.
While we are on the subject, make sure you aren’t watering every day. Once or twice a week max. Water deeply and less often. It will encourage deeper root growth and a hardier plant. And use less water.
An in ground pop up sprinkler system with an irrigation timer is the easiest way to do this, and in the long term it is the most cost effective as well. A well designed system will give an even coverage and will get into the corners without overspray. You will find that it uses less water and that your lawn will be beautiful and easy to maintain.

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