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Harvesting rainwater with a bucket
4 MIN 17 Jun
Last update: 01 Feb 2023

Harvesting and recycling rainwater to feed your lawn

If you want a gorgeous, lush lawn, you need to water your grass. But prolonged periods of drought are becoming more frequent in the UK, and they often lead to hosepipe bans, forcing us to sacrifice our beautiful lawns. But there is a way to get a lush, well-watered lawn all year round: Rainwater recycling.

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Are you worried about the environmental impacts of watering your lawn? If you use a water meter, perhaps you’re concerned about the costs of pouring gallons of water onto your soil?

If you want a gorgeous, lush lawn, you need to water your grass. But prolonged periods of drought are becoming more frequent in the UK, and they often lead to hosepipe bans, forcing us to sacrifice our beautiful lawns for the good of the community.

But there is a way to get a lush, well-watered lawn all year round:

Rainwater recycling.

This blog is all about harvesting rainwater, exploring the pros and cons of this environmentally friendly way of keeping your lawn looking lush and green.

Without the existential guilt.

How to recycle rainwater

There are two main ways to harvest and recycle rainwater.

A water butt is the most inexpensive solution; essentially, a simple network of guttering that channels rainwater into a ground-level storage tank.

Water butts typically hold up to two hundred litres of rainwater. You just pour the collected water through a spout at the bottom of the tank and use this to water your garden.

A water butt will go some way to keeping your lawn lush, but it’s worth considering a Rainwater Harvesting System (RHS) for maximum storage capacity.

Rainwater Barrel

What is a Rainwater Harvesting System?

Rainwater Harvesting Systems can filter and store as much as 6,500 litres of rainwater. With capacities like this, you’ll also have enough excess water to flush your loo and wash your clothes.

In fact, an RHS helps you reduce your household water consumption by up to 40% each year.

How much are we talking?

An RHS will cost you considerably more than a water butt. Water butt systems start from around £25 for entry-level systems, which hold about 100 litres of water, and up to around £500 for systems with higher capacities.

And while 100 litres doesn’t sound like a lot, every drop of water saved helps the environment.

Tim Robertson of Save Water Save Money claims that if each British household were to collect just one water butt’s worth of water each year (around 160 litres), the UK would collectively save 4 billion litres of freshwater every year.

How does a Rainwater Harvesting System work?

An RHS works in precisely the same way as a water butt, collecting rainwater from the gutters on your roof – just on a grander scale. Most RHS systems include high-powered pumps, filters, and a storage container that’s usually buried underground in the garden.

An average domestic RHS usually costs around £2500, so the initial cost is higher. Still, the savings over time add up (especially if you use a water meter to calculate your bills).

What are the benefits of rainwater?

When we switch on the taps in our homes, we receive high-quality water that’s safe for human consumption; made safe with chemical treatments executed at your local treatment plant. This makes our tap water safe to drink, but the chemical makeup of tap water isn’t always perfect for our plants.

Rainwater is naturally softer than tap water and is usually a more suitable pH level for your soil.

How much does it cost to water your lawn?

Sprinkler systems offer a popular method for easy, regular lawn irrigation. But have you ever wondered how much water you use when you set off your sprinkler?

You’d better sit down!

According to Save Water Save Money, using a hose pipe or a sprinkler for an hour can use as much as 1000 litres of water.

And if you use a water meter, that’s going to cost a lot of money.

According to United Utilities:

  • 1 litre of water costs 1p
  • while a cubic metre of water costs £3.08.

1000 litres of water is one cubic metre, so an hour of sprinkling will set you back £3.08. And, while this might not necessarily sound like a massive amount in isolation, if you run your sprinkler twice a week, over a year, it will cost you £320.32.

And to put it into a more relatable context: 1000 litres of water is equivalent to 28 showers or 13 baths.

So, watering your garden uses a LOT of water. And, from a purely financial perspective, collecting rainwater to water your garden is a no-brainer.

Can I use a hosepipe with a water butt?

Water butts are great for filling watering cans, but they don’t produce enough pressure to run a hose.

But there is a solution: an electric water butt pump – which you can buy for around £50 – provides enough pressure to water your lawn with a hose.

This model can deliver 5200 litres in an hour and comes with standard hose pipe connectors.

Find out more about Rainwater Harvesting Systems

If we’ve whetted your appetite (excuse the dad pun!), there’s plenty of resources online that help you explore the possibilities of installing your own Rainwater Harvesting System. For more info, look here.

Happy watering!

 

Louis Hooft
Founder & Lawn expert
Introducing Louis Hooft, the founder of MOOWY and your reliable expert. With a profound love for stunning lawns and extensive experience in garden maintenance, Louis is here to assist garden enthusiasts in achieving a greener and livelier outdoors than ever before. Count on Louis for invaluable tips, clever tricks, and top-notch products to make your garden flourish!
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