There aren’t many consolations to a rainy day– cosy lounge time, soothing sounds of water on the roof, and maybe a rainbow or a puddle-splash afterwards. But you can add one more by placing a water tank to capture a portion of that downpour: it will shrink your environmental footprint by lowering your demand on mains water and the volume of stormwater runoff into rivers and oceans, and can also reduce your water bill in the long term.
Rainwater tanks are no more just huge, round and uninviting; they can be found in all sizes and shapes that can make efficient use of modest or tricky urban spaces.
Water for outdoor or indoor usage?
Easily the most important issue to consider before you get and install a water tank is how you intend to use the water.
Utilizing the water outdoors– for watering the garden and washing the car, for example– is the easiest way to start, as you possibly just need the supplier to set up the water tank, instead of a licensed plumber. And it will immediately cut your consumption of mains water.
Save a lot more by sending the water to your toilet, washing machine or hot water system, but you’ll need to have a licensed plumber to connect the rainwater tank to your mains supply.
What size rainwater tank do I really need?
The volume you choose will rely on the size and shape of your household and garden. Round, squat tanks fit very 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, although is more expensive.
Your roof area and the annual rainfall in your location will also need to be considered. To help determine the size and shape that’s perfect for you, sellers often provide calculators on their web sites, or your water authority may have the opportunity to help.
What else do I need to recognize before purchasing a rain water tank?
Water tanks generally come in the following materials:
Metal tanks are created from corrugated or flat rolled metal, which can be galvanised or coated. They often include a plastic inner lining (Aquaplate) that will increase the life of the tank and shield the water quality.
Polyethylene (plastic) tanks are popular as they are comparatively cheap and durable. Because rust isn’t a problem, they are a great 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 developed to withstand extreme temps. They’re not the cheapest alternative, and better for above-ground installation, while all other types can also be installed below ground.
Concrete tanks, more often used for agricultural and industrial objectives, won’t rust, burn, melt or blow away. They can be bought ready-made, or custom made onsite.
Ask your community council and water supplier which rules and regulations are applicable in your region. You may need to submit a development or building application, and there may be rules around drinking rainwater or mosquito breeding prevention, in addition to restrictions on the tank’s location, colour, height and labelling or noise regulations for a pump.
Are you remodeling, building new or retrofitting?
If you are refurbishing or building, in lieu of retrofitting, you may need to incorporate energy and water-efficient functions in your plans to satisfy new legislative requirements.
When acquiring quotes, penzu.com inquire if there are any further costs for delivery and installation; extra products (such as pipes, fittings and taps); alternative extras (such as a first-flush or backflow-prevention device); a pump (unless you can make use of gravity for water pressure); and a stand (unless you wish to put it on the ground or below it, by which case you’ll need to look into the cost of special ground prep or excavation).
If you would like to connect the tank to your mains water system, factor in the cost of a licensed plumber, and prices for any additional work that needs to be done to your roof and/or guttering.
Can you obtain a water tank rebate?
Talk to your local water or government authority to see if you’re entitled to a cash grant or bill reduction– the answer may depend on the size of the rainwater tank and whether it’s connected to a toilet and/or washing machine.
Rainwater tanks can fluctuate from around $700 to $2000, beginning with 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.