Slimline water tanks are very popular because they can fit into tight or limited spaces, as shown in some of our photos below. A water tank can reduce the cost of your water bill and lower usage of your mains water. A rainwater tank can capture roof run off and be used to keep your garden growing through the dry months. Our slimline water tanks come with a 10 year build warranty and 20 year warranty on the steel, which gives you piece of mind when buying a water tank for us.