When shopping for water tanks, you will be able to find a lot of conflicting advice and recommendations online about what to look for in a tank. Add into the picture that no one would ever admit to selling an inferior or weaker tank, it can become difficult to sort through true claims versus false claims. This article aims to get you thinking about tank quality and how to choose a higher quality tank.
Experiences of Tank Owners
If you have been researching water tanks, then you have probably seen good and bad stories with all different types of tanks, no matter the type of material. So, no point in skirting around the edges here, lets dig into some main issues people report.
First, some tank owners purchased modern steel tanks, COLORBOND® steel tanks, AQUAPLATE®, ZINCALUME® or the like. They report bad experiences with rust and corrosion around the solders, tank strainer, outlet fitting, or perhaps inner linings breaking within a couple of years not covered by warranty. There are often many warranty conditions with steel tanks – perhaps the tank owner unknowingly used such alongside galvanised steel, treated timbres or the like, all of which would can cause corrosion and void steel tank warranties.
Then you have the other crowd who have purchased poly tanks only to see them become brittle after a few years in the Australian Sun, or the colour pigment fading in the polyethylene, or something the like. No one likes their bad experience, so naturally, they try to steer other people from buying a poly tank altogether.
How Tanks Are Manufactured Matters
Tank owners who talk about their tank will often mention the type of material their tank was made from. Sometimes they will proclaim how their “steel tank” or “poly tank” is great, or perhaps they mention some problems experienced and swear people off them.
It needs to be clearly stated that each tank, especially tanks of the same poly or steel material, are not made the same from one manufacturer to the next. Yes, it can be “gimmicky” for businesses to proclaim their tanks are higher quality, and almost anyone can claim this. Yet, it really is true that tanks of the same claimed material can be manufactured to higher and poorer quality products.
For example, steel tanks for example come in different grades of their steel type. Not all stainless galvanised, ZINCALUME® or AQUAPLATE® steels are the same. Some steel tank manufacturers might use lesser quality steel because it is less expensive. Being less expensive to make, these tanks can be sold more cheaply to better compete with higher quality tank brands.
It really depends upon the raw materials and how the tank is manufactured. Case in point, to the horror of some tank owners who purchased stainless steel tanks, one Australian manufacturer was reported by Public and Environmental Health Service in recent years to have used lead in the solders.
Differences in Raw Poly Material
Having established that tanks of the same material can be manufactured to lesser and higher qualities, let us turn to polyethylene often referred to as “poly”. Just like comparing two tanks claimed to be constructed from similar steel can drastically differ in grades and quality, so too can the actual poly substance used when rotomoulding a poly tank.
Poly tanks can be made with different poly mixtures, some poly mixtures are more strong and resilient to UV, others not so much. Some poly mixtures are safe for storing drinkable water, and again, others not so much. For example, National Poly Industries don’t use just any “polyethylene” plastic, but a specially designed poly mix called Rotathene® SUPA UV.
Australian Standards also exist for poly tanks (AS/NZS 4766). These represent manufacturing guidelines (not Australian laws) when making a poly tank to hold liquid under normal atmospheric conditions. These standards are good in that they provide some quality standards to be met. Sadly, some poly tank manufacturers simply state their tanks comply. Without independent certification to specific standards you’re simply taking them at their word.
Further, these only represent minimum recommended industry standards for poly tanks. Consider that the recommended Australian Standard for poly tanks required a minimum UV8 level protection. Like sunscreen ratings, this represents the level of UV protection the poly material will have against the Sun. Now consider our SUPA UV polyethylene incorporates advanced additive technology providing a UV36 level protection.
What this means is compared to other poly tanks on the market that might only meet the minimum Australian Standard for Sun protection, a tank constructed from a UV36-rated poly means it should last 4.5 times longer in the Sun. Since the pigment is added directly to the poly mix, rather than being painted on, such also provided protection against fading.
If you are looking for a water tank, National Poly Industries are leaders in poly tank manufacturing. Our tanks are certified to Australian Standards and made from a food-safe polyethylene mix with SUPA-UV protection. Remaining ahead of the competition is important to us, so in addition to a quality tank we also strive to provide the best price and deal.