Installing a rainwater tank can be quite tricky and may be controlled by local regulations where you live. Consider asking for the services of a professional to help you if this is the case. But if you still want to get one, you need to be aware of a number of factors.

Site Preparation

For the tank to function correctly, the ground has to be completely level at the location site. Also, tanks that are on the large side should be built on sand or concrete. The main aim is to locate the tank so that you gather as much rainwater as you can, so have a look at the condition of the building, especially the guttering. Ensure this is in good repair and clear of any leaves that may have accumulated. Then you need to position the guttering system so that the water is directed towards the tank location, rather than randomly into the undergrowth.


Consider what you will be using the tank for. How much water pressure will you need? If you are going to use it for irrigation, then you will need a specific amount of pressure in order for it to work well. When you have selected an appropriate pump, ensure it is positioned properly so that it doesn't cause too much noise, which may upset the neighbours.

Preventing Backups

If you will be connecting your tank to the mains, you have to fit a backflow prevention valve. Then, when the water in your tank fills up, it will not be able to "flow back" into the mains supply. Sometimes, the pump that you will fit has a prevention valve for this purpose, but you should ask your plumber for advice here.


Make sure that bugs cannot enter your tank and treat all of the pipes and overflows with insect proofing. Remember, mosquitoes would love to make a home in your rainwater tank.

Being Afraid of Lead

Many rooftops have lead flashing attached, and you want to avoid any lead from being sent into your water system. Find a device known as a "first flush" in order to divert all the water away from your tank when it first begins to rain. This will automatically prevent some of the pollutants from getting into your water system.

Keep It Clean!

You can use gutter protectors in order to keep your system clean and clear of rotting debris, especially during the season when the trees are naturally shedding. You don't want accumulated debris to rot and contaminate the supply, after all.