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Wet and Dry Rainwater Harvesting Systems: What Is the Difference?

What many homeowners aren’t aware of is that there are several different types of rainwater harvesting systems available for installation within our homes. You will find that the main difference is the choice between a wet or dry system, both of which have their own pros and cons.

If you’re interested in which might be right for you, keep reading and we’ll highlight the differences.

The Wet Rainwater System

When specifying a rainwater harvesting system, you will need to give a lot of consideration into how rainwater will be collected and routed to your water storage tank.

A wet system utilises the retention of water within the distribution pipework, meaning that a small quantity of water will always be sitting just outside the storage tank. Rainwater is collected from the roof where it is then transported via a series of gutters and downpipes, eventually heading underground before connecting to any other downpipes within the system and then finally the storage tank.

You will find that each of these downpipes collects into one large section of pipework which enters the storage tank from the underside. It is this gravity fed system which denotes the difference between a wet and dry system; the pipework needs to remain filled with water to fill the tank.

The Benefits

This type of system has several benefits which include;

  • The ability to facilitate a neat installation, making sure that the only pipework visible above ground are the downpipes entering the ground.

  • Wet systems are more suited to larger installations because it is easier to locate large networks of pipework underground.

  • This system is also much more suited to storage tanks which sit more than a few metres away from your property.

The Dry Rainwater System

The dry system differs due to the fact that after rainfall, each section of pipework remains dry as any water captured is completely drained into the connected storage tank.

This in turns means that much more thought and attention has to be given to how each section of pipework will be arranged above ground.

Dry systems are typically used when your water storage tanks are placed in very close proximity to your property. The pipework installed will need to be suspended within the air which makes bridging large spans impossible without the use of additional structural support.

The Benefits

This type of system has several benefits which include;

  • The maintenance of dry systems is much more efficient due to the accessibility of above ground pipework.

  • There is less likelihood of potential hazardous contaminants entering your water supply due to there being less places for stagnant water to rest.

  • Any fault with the installation can be visually detected with relative ease due to greater levels of system visibility.

The solution that is right for you will depend on how your property is laid out. If you’re still unsure which type of system may work best, we would suggest getting in touch with a local supplier for further advice. Water tanks in Brisbane can be installed by one of several suppliers operating in the area. Simply approach a couple and request a quotation.

The benefits of any rainwater harvesting system are considerable, so whichever type you choose, you’ll be able to reap the rewards.

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