Rainwater Harvesting

Rainwater Harvesting Systems & Products

Smart rainwater harvesting solutions available to browse and buy online

Owls hall environmental’s rainwater harvesting range includes complete systems, tanks and accessories.

Our top of the range rainwater harvesting systems are carefully selected to give you the choice of the best products available, helping you make better use of the rainwater that falls on your property. Our unique packages focus on quality components which offer a higher degree of filtration than you will find anywhere else on the market.

Rainwater Harvesting Systems from Owls Hall

As installers and service engineers, we are well placed for giving you trustworthy product advice about which of our solutions will best suit your rainwater collection needs.

Our unique rainwater harvesting products, combined with our solution-focused approach and 50 years of experience, make us the partner of choice for many homeowners, builders and ground workers throughout the UK.

Browse our rainharvesting systems and products and contact us directly if you want to discuss efficient and effective rainwater harvesting solutions.

What is

Rainwater Harvesting?

Rainwater harvesting is a way of collecting and storing rainwater with a view of reusing it on your premises.

It’s a great strategy for reducing your water bills by up to 50% and making sure you have enough water to cultivate your garden, even during periods of severe drought and hosepipe bans.

Opening Quotes Closing Quote

I was recommended Owls Hall through a colleague who had used Owls Hall on commercial projects and knew that as well as having the civil engineering experience they also had a proven track record on the domestic side. I was not disappointed. I was taken care of every step of the way, from the advice of the sales team to the expert care taken by the engineers, to the excellent after sales service. I’ve signed up to the service and emptying plan, so they’ll be coming back to take care of my system every year.

Graham Davey

Domestic Testimonial

Opening Quotes Closing Quote

Very good at keeping to budget and schedule.

Installation customer in Ely, Cambridgeshire

Domestic Testimonial

Opening Quotes Closing Quote

Excellent service and quality of work.

Interceptor service for customer in Rugby

Domestic Testimonial

Opening Quotes Closing Quote

Very professional and efficient, can’t fault them

Klargester service customer in Chelmsford

Domestic Testimonial

Opening Quotes Closing Quote

A very courteous, fast and efficient service, as usual.

Mr Bushnell

Domestic Testimonial

Opening Quotes Closing Quote

A sincere thank you for the splendid job your team made in installing our BioDisc unit. Everything went according to plan and the whole job was carried out with great professionalism and obvious skilled knowledge.

Mr Falshaw

Domestic Testimonial

Opening Quotes Closing Quote

We have had a lot of building work here and we have never really been happy with anyone, but from start to finish your company has been excellent.

Mr Watson, Latchingdon

Domestic Testimonial

Opening Quotes Closing Quote

Good bloke, he always does a good job and I have used them for the last 5 years.

Servicing and emptying customer in Dunmow, Essex

Domestic Testimonial

Opening Quotes Closing Quote

I have been a customer of Owls Hall Environmental Ltd for over 15 years and they service and empty my home’s off mains sewage system on a regular basis.  I am always happy with their service; their team are polite and extremely helpful and they always do an excellent job. It is obvious that customer experience and satisfaction is extremely important to Owls Hall. I would certainly recommend them to anyone who has an off mains sewage system.

Simon Lance Burgess LL.B. residential customer and CEO of British Money

Domestic Testimonial

Knowledge Centre

Rainwater Harvesting advice for beginners to experts

What Is Rainwater Harvesting?

Rainwater harvesting is a way of collecting and storing rainwater with a view to reusing it. It is a great strategy to reduce your water bills and ensuring you have enough water to reuse in your house or garden in times of drought and hose pipe bans.

Read More

What Size Rainwater Tank Do I Need?

As a simple rule of thumb, for domestic system you will require about 1000 litres of storage per person.

There are more detailed calculations that can be performed to assess the best size of rainwater harvesting tank.

Read More

How Much Water Can A Rainwater Harvesting System Save?

In a domestic house system, you can save up to 50% of your water consumption, although we feel it is more likely to be 40%.

Read More

How Do I Plan For A Rainwater Harvesting System?

If you’ve already decided that you want to install a rainwater harvesting system, there are a few other practicalities to get out of the way to make sure everything goes smoothly. This FAQ by Owls Hall Environmental gives you information on the key things to consider.

Read More

How To Save Water At Home

Owls Hall Environmental has collected a number of tips to help you save water at home. We’ve covered a range of water-saving ideas, from little changes you can make to your routines through to more efficient ways to use water in your garden.

In a period of increasingly unpredictable weather and damaging climate change, saving water where we can helps to ease the strain on Britain’s water supply. Our tips will also help you save money if you have a water meter and could also cut down on your gas and electricity bills.

Read More

Why Should I Harvest Rainwater?

Any water saving is good, whether it is a low flush toilet, or a rainwater harvesting system. These days we see water as a commodity which is regularly wasted.

Read More

Complete Systems

Our complete rainwater harvesting systems can allow you to collect recycled rainwater and supply it to a number of domestic appliances, including toilets, washing machines and garden taps.

Underground Rainwater Tanks

Storing water in underground rainwater tanks stands out as the optimal choice for numerous household rainwater setups. By being situated below ground, the water maintains a consistent, cooler temperature while staying shielded from sunlight. This prevents algae growth, ensuring your water remains fresh and clean over an extended period.

Water Butts

Smaller rainwater harvesting solutions, like water butts, reduce your reliance on the mains system by providing water that you can use for all kinds of outdoor activities.

Rainwater Filters

Enjoy cleaner rainwater with leaf filters, particle filters and more – all compatible with our rainwater harvesting systems. Find out more about our rainwater filters.

Pumps and Controls

Our rainwater harvesting pumps are essential for connecting your harvested rainwater to your domestic systems. Our pumps and top-up controls are of the highest quality.


Maintain your rainwater harvesting system to get the most out of it, increase its lifespan and to make it as simple to operate as possible with these rainwater harvesting accessories.

What Are the Benefits of Harvesting Rainwater?

The recent heat waves and droughts seen throughout the UK this year (and the potential for more in future according to the Met Office), many are looking for alternative ways to save water.

There are numerous benefits of investing in a rainwater harvesting system aside from helping during periods of drought, including:

  • Save up to 50% of an average household’s water consumption. Even a smaller water tank can drop the amount you pay in water bills by 25%
  • A rainwater tank and system is quick and easy to install.
  • Access to free, clean water that’s free of chemicals as the water is passed through a filtration system.
  • It’s environmentally friendly.
  • Decreases soil erosion.
  • Lowers flooding risk.
  • Great for managing lakes and rivers – lowering pollution.
  • It reduces strain on aquifers and ground water sources.
  • Water from a rainwater storage tank is exempt from hosepipe bans, so long as they aren’t connected to your property’s mains water system.

Investing in a rainwater harvesting system makes environmental and economic sense.

What Are the Uses of Rainwater?

The uses of water saved using rainwater harvesting kits seem endless. Just a few include:

  • Garden watering – use it for watering plants including edible gardens (take a look at our garden rainwater harvesting systems).
  • Filling up garden ponds or refilling domestic swimming pools.
  • Washing your car (non potable systems).
  • Flushing toilets (non potable systems).
  • Pump the water to your washing machine (non potable systems).
  • Commercial businesses can use water harvested from their building towards gaining credits for BREEAM compliance (although this does depend on additional factors so we recommend exploring this further).
  • The water can be used during hosepipe bans so long as they aren’t connected to your mains. This is great during heat waves where there are droughts coupled with hosepipe bans.

Is Collecting Rainwater Illegal in the UK?

While there are rules in other countries, it’s perfectly legal to harvest rainwater in the UK. However, there are conditions and rules that needs to be followed.

If you’re planning on using the water in the following ways, you won’t be required to apply for a water abstraction license:

  • If you’re planning for the rainwater to be pumped or harvested into a reservoir without any being combined with other water.
  • To utilise rainwater that hasn’t ‘entered’ groundwater or inland surface waters.
  • To use the harvesting system for irrigation rather than a source of water supply.
  • If you’re planning to use the storage as irrigation in a reservoir with an overflow (so long as the reservoir is only filled by water sourcing methods under this licence.

With that said, there are some situations where you need to obtain an abstraction license. This includes if you’re combining harvested rainwater with other sources and pumping it into a reservoir storage system to be sent to any of the following inland waters:

  • Licenced water from another source
  • Gravity intake
  • Underground strata
  • Land drainage
  • Any watercourse.

You can get full information on this from the Gov.uk website.