Archive for September, 2009

Water tanks are traditionally made from steel. now becoming more and more popular is the poly version of the water tank.  The traditional steel water tanks have now all but faded out of existance and new aquaplated steel water tanks have taken their place which are more resistant to rust than the predecessor. however, some of the same limitations still apply with tanks being made out of multiple sheets of steel there is still the chance of rust begining or if bumped in the wrong place near a seam a week spot may be created. poly water tanks have the benifit of being made of a more durable material. Additionally, the poly versions of water tanks are now predominantly made via the rotational moulding process which allows the water tanks to consist of one seamless piece of poly. below are some pros and cons of each.

Steel water tanks pros:

• can be made to any size due to the manufacturing process
• can be made in larger sizes as they can be made on site
• can have additional poly lining to protect against leaks
• they have the traditional look and can be more glossy to repel heat

Steel water tank cons:

• are not made in one piece
• can be expensive
• need a concrete pad
• need to be lined in poly to give added protection
• are more delicate if need to be moved
• can be given dints which can cause week spots

Poly water tank pros:

• poly water tanks are more durable
• poly is longer lasting
• poly tanks are thicker and will not ding
• water tanks made from poly can be relocated easily by rolling or even sliding along the ground
• poly tanks are now made with food grade poly that is uv stabilised
• they are relitivly inexpensive
• need less base preparation

Poly water tank cons:

• are limited to about 50,000 litres due to them being made in a factory and trucked out
• sizes are limited to what moulds the manufacturer has available