Rainwater Tank Buying Guide

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In this Rainwater Tank Buying Guide, we will help you to understand the different types of rainwater tanks available to buy on GutterMate, so that you can ascertain which tank is most suitable for your rainwater harvesting system.

At Gutter Mate we stock a wide range of rainwater tanks suitable for storing low and high volumes of rainwater as part of your domestic or commercial rainwater harvesting system.
We understand that it is can be hard to choose a Rainwater tank for Storing Recycled Rainwater and you’re probably wondering which type and size of tank to buy.

View our full range of rainwater tanks.

The majority of our tanks are made from Polythene. Polyethylene is the most commonly used plastic tank material. It has good chemical resistance, is impact resistant, and easily moldable. Because of its economical price and wide range of uses polyethylene is available in many different styles including vertical, horizontal, cylindrical, double walled, cone bottom, and more.

For bespoke rainwater harvesting systems we are able to source tanks made from other materials. Two of the criteria we use to determine the tank for a particular application, is to select technically the best tank for the job and at the most competitively priced. We are happy to work to your needs and budget. Start with reading our In this Rainwater Tank Buying Guide and let us know if you have any questions.

Tank Size

The capacity you choose will depend on the size and shape of your premises and garden/and or land and also on the amount of rainwater you need to collect for your needs.  

Squat tanks fit well under a deck, while slimline tanks are good for narrow spaces. Underground water tanks are good out-of-sight space savers, but are a more expensive than above ground rainwater storage.

Your roof area and the annual rainfall in your region will also have to be considered. Contact us if you need further advice on this.

Potable or Non-Potable Rainwater Tank?

If you don’t know the difference, don’t worry, you’re not alone. Potable water storage tanks are suitable for the safe storage of drinking water.

Non-potable tanks are not suitable for storing water for human consumption. In general, most plastic water tanks are non-potable tanks and are therefore not suitable for storing drinking water.

Non-potable tanks can be used for domestic and commercial rainwater harvesting, where the stored rainwater is used for watering the garden, flushing toilets, washing machines and for cleaning cars.

Non-potable rainwater tanks can be place above or below ground.

Search our Non-potable rainwater tank range.

The materials used during the manufacturing process of a water tank, specifically the inside of the tank, which comes into contact with the contained water, dictates what type of tank it will be classed as.

Depending on the intended use of a water tank, it’s important to know the difference.

If you specifically need to store drinking water  you will need a potable tank.

Our range of Potable Vertical Rainwater Tanks conform to WRAS (Water Regulations Advisory Scheme) Potable Water Standards and Regulations for the safe storage of drinking water. Starting at 500 Litres then going up to and above 22,000 Litres, our Potable Water Tanks are made from polyethylene, which is a tough and durable material which will ensure the tank you buy is fit for purpose and made of the highest quality materials.

Above or Below Ground Rainwater Tank?

Cost and space are the two main factors when deciding whether you want to purchase an above or below ground rainwater tank. This will depend upon how much foot print area you are prepared to allocate.

Underground Tanks

Underground tanks are suitable if you have little above ground space and/or you don’t want the tank to be visible and you have a bigger budget available for your rainwater harvesting package. Below Ground tanks normally use submersible pumps.

In some cases installing an underground water tank will not be an option. Underground tanks are easier to install on new eco-build properties, as architects can make room for the system from the start.   

Underground tanks are available in many sizes. You can purchase horizontal and cylindrical or shallower rectangular water tanks. The advantage of shallow rectangular tanks is that the depth of the excavation is less. If you’re in an area where the water table is high, this type of tank will be far easier to install and are normally smaller capacity than the round tanks. F-Line Flat Underground Tanks are available in 1500L, 3000L, 5000L and 7500L sizes with accessories.

Above Ground Water Tanks

Above-ground rainwater systems are easier to install and maintain and normally above ground tanks are the best value for money.
If space is an issue, you can always purchase multiple above ground tanks and connect them together. For example, you could purchase 3 x 1,000L tanks rather than purchase one very large 3,000L tank. This is a popular option for people seeking to use space available more efficiently. 

View our decorative range of water tanks here.

Squat Tanks

Squat tanks are ideal for putting tank under decking and raise patios because they’ve got very little height and can be easily installed. If you have raised decking it’s an ideal place to locate your rainwater tank. In these circumstances the squat tank it an ideal solution.  Self-priming pumps are compatible with this type of tank.

View our range of Squat Tanks.

You’re probably wondering, what is a static water tank?

Static, rectangular tanks are very space efficient but they also come in round and circular form. Static water tanks are manufactured from UV stabilised polyethylene. Ribbed design provides added strength and attractive appearance. These tanks do not rust or corrode, are impact resistant and long lasting. Guaranteed one-piece tank construction ensures long term structural strength.

Vertical Rainwater Tanks

We stock both potable and non-potable vertical rainwater tanks. We sell many tank sizes ranging from 150 to 30,000 litres, which are designed for many rainwater harvesting uses across agricultural, commercial, domestic, horticultural, industrial and irrigation industries.

If you have any questions regarding choosing the correct rainwater tank please do contact us, we’re happy to help.