There aren’t many consolations to a rainy day– cosy sofa time, soothing sounds of water on the roof, and perhaps a rainbow or a puddle-splash afterwards. But you can add one more by building a water tank to capture some of that downpour: it’ll diminish your environmental footprint by reducing your demand on mains water and the quantity of stormwater runoff into rivers and oceans, and can also reduce your water bill in the long-term.
Rainwater tanks are no longer just huge, round and unsightly; they can be found in all shapes and sizes that can make efficient use of minimal or tricky urban spaces.
Water for outdoor or indoor application?
Probably the most important issue to consider before you get and install a rainwater tank is how you want to use the water.
Applying the water outdoors– for watering the garden and washing the car, as an example– is the simplest way to start, as you probably just need the supplier to set up the tank, as opposed to a licensed plumber. And it will immediately cut your consumption of mains water.
Save lots more by sending the water to your toilet, washing machine or hot water system, but you’ll need a licensed plumber to connect the rainwater tank to your mains supply.
What size rain water tank do I need to have?
The volume you choose will rely on the size and shape of your household and garden. Round, squat tanks fit well under a deck, while slimline tanks are good for narrow spaces. An underfloor tank or bladder storage system is a good out-of-sight space saver, however, is more expensive.
Your roof area and the annual rainfall in your location will also have to be considered. To help determine the size and shape that’s right for you, sellers often provide calculators on their internet sites, or your water authority may have the ability to help.
What else do I need to understand before investing in a rainwater tank?
Rainwater tanks commonly can be found in the following materials:
Metal tanks are created from corrugated or flat rolled metal, which may be galvanised or coated. They often come with a plastic inner lining (Aquaplate) that will boost the quality of life of the tank and safeguard the water quality.
Polyethylene (plastic) tanks are well-liked as they are relatively cheap and durable. Because rust isn’t an issue, they are a good option for people living near the coast. Other synthetic materials, such as PVC and geotextile, are utilized for bladder storage. Bladders are useful for water storage below a deck or floor; while their material is strong, it’s not intended for outdoor installation.
Fibreglass tanks are rust and chemical-resistant and manufactured to withstand extreme heat levels. They’re not the cheapest alternative, and more suitable for above-ground installation, while all other styles can also be set up below ground.
Concrete tanks, more frequently used for agricultural and industrial objectives, won’t rust, burn, melt or blow away. They may be bought ready-made, or penzu.com customized onsite.
Ask your local area council and water supplier which rules and regulations are applicable in your local area. You may need to submit a development or building application, and there may be regulations around drinking rainwater or mosquito breeding prevention, as well as restrictions on the tank’s placement, colour, height and labelling or noise regulations for a pump.
Are you renovating, building new or retrofitting?
If you are remodeling or building, rather than retrofitting, you may have to incorporate energy and water-efficient characteristics in your plans to fulfill new legislative requirements.
When getting quotes, ask if there are any additional costs for delivery and installation; extra materials (such as pipes, fittings and taps); optional extras (such as a first-flush or backflow-prevention device); a pump (unless you can utilize gravity for water pressure); and a stand (unless you intend to put it on the ground or below it, through which case you’ll need to consider the cost of special ground prep or excavation).
If you intend to connect the tank to your mains supply of water, consider the cost of a licensed plumber, and costs for any extra work that needs to be done to your roof and/or guttering.
Can you receive a water tank rebate?
Check with your local water or government authority to see if you’re entitled to a cash grant or bill reduction– the answer may rely on the size of the water tank and whether it’s connected to a toilet and/or washing machine.
Rainwater tanks can fluctuate from around $700 to $2000, starting from a small, freestanding model without pump or extras, to large, custom-built models. Costs vary depending on the size, material, finish and strength of the tank.