How does a rainwater tank work?



Only Pioneer Can Protect Rainwater Clean Enough to Drink


Rainwater can be collected off of a rooftop as a sustainable water source and stored in a Pioneer Water Tank for later use. Depending on the system set up, the rainwater can be used for domestic and in some cases, as the primary drinking water source. Rainwater systems vary from a simple barrel set up to completely supplying water for a building or home and can be used as a water source for firefighting. There are even rainwater systems set up as a wildlife water source or as a stormwater management technique.


Using a rainwater system is beneficial because it reduces demand on existing water supply, and reduces runoff, erosion, and contamination of surface water. When designing a rainwater system, the first step is to decide the goal and use of the water.


Storing the rainwater in the right capacity and properly is key to avoiding contamination and overflow. Rainwater tanks must be properly screened and secured without allowing sunlight into the tank. Rainwater storage tanks must have an inlet, outlet, overflow, vent, and inspection or service port.


Pioneer Water Tanks were engineered to protect water from the very start. The entire design and quality materials are chosen as the best possible way to keep water fresh and clean.


– The AQUALINER® Fresh tank liner inside of the tank stores the rainwater safely. The NSF 61 Certified, Antimicrobial, BPA-Free tank liner has a 65-year lifespan and is covered by our warranty. (Learn  More)


– The V-LOCK corrugation style of the tank body is unique to Pioneer Water Tanks and provides the ultimate strength and durability. The V-LOCK corrugation allows for the tank liner to be attached down the tank walls to alleviate the stress to the liner from the weight. Most tank liners are attached only at the top which can lead to stretching and breakdown of the liner – which is why Pioneer Water Tanks attach our liner to the corrugation. (Learn More)


– All of our standard accessories, as well as our optional additions, are to improve the quality of rainwater stored. This includes filtering rainwater through a thousand count mesh filter, and including an inlet, outlet, overflow pipe and vent specified for drinking water storage tanks.



The quality of the rainwater tank determines how well the water will be stored for later use. Using a poly tank, for example, will mean that it shouldn’t be used as a drinking water source because of leaching but it should still be properly sealed to prevent mosquitos. There are places like Hawaii that see cases of diseases from water contamination including Leptospirosis. Preventing contamination should be the primary goal of your rainwater tank with filtration post-storage if used as a drinking water source.


Pioneer Water Tanks are engineered as the top-tier rainwater tank to protect your water supply from contamination. They are implemented worldwide for their longevity and quality of storage that is proven to keep your water fresher for longer. If you would like to store rainwater in a large capacity, get started with your local Pioneer Water Tanks accredited dealer for your best price.


Resources on Rainwater Harvesting:

  • The Texas AgriLife Guide to Rainwater Storage Tanks (Link)

  • The Texas Manual on Rainwater Harvesting (Link)

  • Laws and regulations for rainwater harvesting in the United States (Link)



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