There aren’t many consolations to a rainy day– cosy lounge time, soothing sounds of water on the roof, and possibly a rainbow or a puddle-splash afterwards. But you can add another by building a water tank to capture a portion of that downpour: it will decrease your environmental footprint by lowering your demand on mains water and the amount of stormwater runoff into rivers and oceans, and can also slash your water bill in the longer term.
Rainwater tanks are no more just huge, round and hideous; they are available in all sizes and shapes that can make efficient use of minimal or tricky urban spaces.
Water for outdoor or indoor use?
Probably the most important issue to consider before you buy and install a rainwater tank is how you would like to use the water.
Using the water outdoors– for watering the garden and washing the car, for example– is the most convenient way to start, as you possibly just need the supplier to set up the rainwater tank, rather than a licensed plumber. And it will instantly cut your usage of mains water.
Save even more by sending the rain water to your toilet, washing machine or water system, but you’ll need to have a licensed plumber to connect the water tank to your mains supply.
What size rain water tank do I need to have?
The storage capacity you choose will hinge on the size and shape of your household and garden. Round, squat tanks fit efficiently 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 area will also have to be considered. To help determine the size and shape that’s ideal for you, sellers often provide calculators on their sites, or your water authority may have the capacity to help.
What else do I need to understand before getting a water tank?
Rain water tanks commonly can be found in the following materials:
Metal tanks are crafted from corrugated or flat rolled metal, which might be galvanised or coated. They often incorporate a plastic inner lining (Aquaplate) that will boost the quality of life of the tank and protect the water quality.
Polyethylene (plastic) tanks are well-liked as they are relatively cheap and durable. Because rust isn’t a problem, they are a pretty good option for people living near the sea. Other synthetic materials, like 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 created to withstand extreme heat levels. They’re not the cheapest choice, and more suitable for above-ground installation, while all other kinds can also be set up below ground.
Concrete tanks, often used for agricultural and industrial purposes, won’t rust, burn, melt or blow away. They could be bought ready-made, or custom made onsite.
Ask your regional council and water supplier which rules and regulations are applicable in your region. You may need to forward 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 location, colour, height and labelling or noise regulations for a pump.
Are you renovating, building new or retrofitting?
If you are remodeling or building, instead of retrofitting, you may need to incorporate energy and water-efficient elements in your plans to observe new legislative requirements.
When securing quotes, inquire if there are any further costs for delivery and installation; extra components (such as pipes, fittings and taps); alternative extras (such as a first-flush or backflow-prevention device); a pump (unless you can employ gravity for water pressure); and a stand penzu.com (unless you wish to put it on the ground or below it, by which case you’ll need to factor in the cost of special ground prep or excavation).
If you want to connect the tank to your mains supply of water, factor in the cost of a licensed plumber, and expenses for any supplementary work that needs to get done to your roof and/or guttering.
Can you get a water tank rebate?
Consult your local water or government authority to see if you’re entitled to a cash rebate or bill reduction– the answer may hinge on the size of the water tank and whether it’s connected to a toilet and/or washing machine.
Rainwater tanks can range from around $700 to $2000, starting from a small, freestanding model without pump or extras, to large, custom-built models. Costs vary depending upon the size, material, finish and strength of the tank.