Shapes, Sizes, and Dimensions of Various Rainwater Storage Tanks
Rainwater Storage Tank Sizes
Rainwater storage tanks do literally come in 'all shapes and sizes' and just about any color that you could choose. It is not the purpose of this article to give you the dimensions and shape of every available water tank. Rather, it is designed to give you the information needed to help you decide if you actually want a water storage tank.
My household survives on water harvested from the rainfall, and we would not want it any other way. If we ever move from our 2-acre property, we will definitely be installing some form of rainwater capture and storage system.
So Many Shapes - So Many Sizes
From the observations I have made through my years of research there is such a large number of different types of tanks available, I could not possible cover them all in this one Hub, they are made from just about any material you can name.
If anyone has come across any other type or shape let me know and I will include it here for everyone's benefit!
I have sorted through all of my research and short listed the most popular for your perusal!
Corrugated Galvanized Steel
Corrugated Galvanized Steel. These tanks are hand riveted and sealed with compound (in Australia, the old method of soldering has been banned) and if required for potable water, they are internally coated with approved certified coatings. Linings are also available to fit inside the tank. It is recommended that they be installed on a concrete pad.
Although very popular in the past, these corrugated galvanized tanks are being outsold by the plastic (polyethylene) tanks, Possibly due to the lower cost and the fact that the poly tanks can look nicer and can be manufactured in just about any form and colored to fit into the surrounding environment.
Plastic (Polyethylene) Rainwater Tanks
Due to the manufacturing process, plastic (polyethylene) water-storage tanks can come in just about any shape or form you can imagine: round, slimline (becoming popular due to houses being built on smaller blocks) and rectangular. Research shows that the size of these tanks can vary between 700 and 5,000 litres. I believe that they are now even bigger.
These poly (as they are now called) water storage tanks also can be purchased in a variety of colors including, greens, reds, browns, beiges and many more.
Water-Storage Tanks: Concrete
Concrete water storage tanks are very popular in Australia and are manufactured to strict regulations with bases up to 4 inches thick, walls up to 2 inches thick and the roof can be up to 4 inches thick.
All concrete is reinforced with either galvanized welded mesh, wire and/or rods. The larger models have a center support column.
Capacities can vary from 1000 gallons (5000 litres) to 5500 gallons (25,000 litres)
On my property, we have 3 concrete tanks capable of holding 15,000 gals (67,000 litres) of water. We have had overflow only on 2 occasions!
You can never have enough water so we have now installed a 3000-litre rectangular tank under our deck. It is fitted with a pressure operated electric pump and is used for the garden!
Bladder Water-Storage Tanks
Bladder water-storage tanks are now popular due to lack of space in the modern home and a requirement of some building authorities that water storage is now mandatory in new homes.
Bladder storage tanks are becoming more popular because they can be installed under houses, decks etc. and can be removed when the owner decides to relocate.
Potable water bladder tanks are made out of material approved for storing consumable liquids and come in sizes up to about 10,000 gallons. The job of fitting bladder tanks under a house can be quite formidable and it is recommended to have them specially fitted.
Dimensions and Capacities of Various Water Tanks
To give you some idea on the size of tank for the required amount of water, I have listed below the dimensions and approximate capacity for some popular tank sizes, I hope this information is useful, though this is by no means a definitive table!
Capacity of Water Tanks
3 feet (0.9mtr)
6 feet (1.80mtr)
220 gals (1,000ltr)
7.8 feet (2.40mtr)
6 feet (1.80mtr)
1770 gals (8,000ltr)
Water-Storage Tanks Underground
These days some home builders have decided that the above ground storage tanks are not to their liking and more people are opting to have the water storage tanks installed underground, similar to how a petrol station has its fuel tanks underground!
These tanks can be any shape, but most are designed using a round shape because I believe it is a stronger structure and can withstand many years of pressure from the surrounding fill.
Underground water-storage tanks have quaint names such as "Donut" and "Bagel" for obvious reasons.
Do you have a water tank?
What type of water tank do you have?
This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.
© 2010 Peter