Most rainwater tank systems will require a pump to generate adequate pressure. Washing machines and some irrigation systems require a level of pressure similar to mains water. When connecting your rainwater supply to your toilet or laundry, leading plumbers recommend a pump which will automatically switch to mains supply when your tank water runs dry. In times of water restrictions you must ensure you are not using mains supply on your garden. You also need to provide electricity to the pump close to the tank. Be mindful of neighbours as pumps can be quite loud, nylon blade pumps are quieter than ones with metal blades.

These devices are useful to divert the first 20 litres of rainfall from entering your tank. This will prevent pollutants on your roof from entering the tank. For example, many roofs have lead flashing which can be dangerous. A sump box between the downpipe and the tank can slow the water flow down, separating out any sediment not previously diverted.

Regulations stipulate that backflow devices must be installed to prevent tank water from entering the mains system. As the name suggests a backflow prevention valve stops water from your tank from entering back into the mains supply. Most households have backflow prevention devices installed at the water meter. Some pumps also act as a backflow prevention so extra valves are not required. Ask your plumber for further advice.

Make sure you ask your plumber about the additional extras you need as they can increase the total cost. Your quote should also include all measures to meet government standards.

A rainwater tank can be an attractive refuge for insects and other creatures, especially as a breeding ground for mosquitoes. There are a range of products that you can install on your downpipes and overflows to prevent insects from getting into your water such as mosquito proof mesh.

Leaves and debris often build up in gutters which effects water flow during heavy downpours and can potentially contaminate your water supply. Avoid u-shaped gutters as they trap leaves and twigs. Gutter protectors, filters and regular maintenance can help to solve this problem.

A tank stand can provide additional pressure if you choose not to install a pump and makes it easier to fill watering cans and buckets at the tank. The type of tank stand or foundation you require will depend on the material, size and weight of your tank. Ensure that you ask your tank manufacturer before you purchase the tank, as the stand may be included. Some stands require building permits so you should consult your local council

If the tank contains mains water it can not be used on the garden during water restrictions. Trickle top up systems use a float valve to measure how much water you have in your tank. When the water level gets too low, mains water will trickle into the tank to top it up.