There aren’t many consolations to a rainy day– cosy sofa time, soothing sounds of water on the roof, penzu.com and perhaps a rainbow or a puddle-splash afterwards. But you can add yet another by building a water tank to capture a bit of that downpour: it will decrease your environmental footprint by minimizing your demand on mains water and the amount of stormwater runoff into rivers and oceans, and can also trim your water bill in the longer 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 small or tricky urban spaces.
Water for outdoor or indoor use?
Probably the most important issue to consider before you acquire and install a water tank is how you wish to use the water.
Utilizing the water outdoors– for watering the garden and washing the car, as an example– is the easiest way to start, as you possibly just need the supplier to set up the water tank, as opposed to a licensed plumber. And it will instantly cut your usage of mains water.
Save lots more by sending the rainwaer to your toilet, washing machine or water system, but you’ll require a licensed plumber to connect the rainwater tank to your mains supply.
What size rainwater tank do I really need?
The storage capacity you choose will hinge on the shapes and size of your household and garden. Round, squat tanks fit very well under a deck, while slimline tanks agree with 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 need to be considered. To help determine the size and shape that’s perfect for you, sellers often provide calculators on their websites, or your water authority may have the capacity to help.
What else do I need to understand before purchasing a rain water tank?
Rain water tanks normally come in the following materials:
Metal tanks are created from corrugated or flat rolled metal, which might be galvanised or coated. They often feature a plastic inner lining (Aquaplate) that will increase the life of the tank and safeguard the water quality.
Polyethylene (plastic) tanks are well-liked as they are reasonably cheap and durable. Because rust isn’t a problem, they are a good option for people living near the ocean. Other synthetic materials, like PVC and geotextile, are applied for bladder storage. Bladders are useful for water storage below a deck or floor; while their material is durable, it’s not intended for outdoor installation.
Fibreglass tanks are rust and chemical-resistant and designed to withstand extreme temperatures. They’re not the cheapest option, and better for above-ground installation, while all other styles can also be installed below ground.
Concrete tanks, more frequently used for agricultural and industrial functions, won’t rust, burn, melt or blow away. They may be bought ready-made, or custom made onsite.
Ask your local council and water supplier which rules and regulations are applicable in your location. You may need to submit a development or building application, and there may be guidelines around drinking rainwater or mosquito breeding prevention, in addition to restrictions on the tank’s specific location, colour, height and labelling or noise regulations for a pump.
Are you refurbishing, building new or retrofitting?
If you are restoring or building, rather than retrofitting, you may have to incorporate energy and water-efficient functions in your plans to fulfill new legislative requirements.
When securing quotes, ask if there are any additional 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 (unless you intend to put it on the ground or below it, by which case you’ll need to consider the cost of special ground prep or excavation).
If you wish to connect the tank to your mains water system, look into the cost of a licensed plumber, and prices for any additional work that needs to get done to your roof and/or guttering.
Can you acquire a water tank rebate?
Consult your local water or government authority to see if you’re entitled to a cash discount or bill reduction– the answer may rely on the size of the rain 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.