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Simple Rainwater Harvesting Calculator UK
How much rainfall does it take to fill a water butt from a downpipe?
Water is a finite resource, and yet the demand for everyday use continues to grow. Collecting rainwater from your roof is an easy and smart way of reusing free water. Water butts are an excellent way to store water for later use in gardens. With the price of mains water increasing, if you want to be sure you can care for your garden during the summer months, water butts are an obvious choice.
Rainwater Harvesting Calculator UK
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16th Oct 2025
Mains Water Backup in Rainwater Harvesting Systems – Should the Pump Run During Top-Up?
If you’ve got a home rainwater harvesting system with a mains water backup, getting the setup right is critical — especially when it comes to how your pump behaves during the top-up cycle.
One important question we often get is: Should the rainwater pump keep running when solenoid is topping up the tank with mains water?
In most domestic installations, the answer is no — and here’s why:
Why You Should Pause the Pump During Top-Up
1. To Protect the Pump from Dry Running
W
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14th Aug 2025
Reusing Grey Water in the UK: A Practical Guide for Gardeners Facing Drought
This summer, we’ve received a growing number of enquiries about how to reuse bath water in the garden—especially from those facing another round of hosepipe bans due to the prolonged heatwave across the UK.
If you’re in Yorkshire, the Southeast or another drought-prone area, and you're trying to keep your fruit trees, borders, or lawn alive without relying on mains water, grey water reuse could be a game-changer.
Let’s take a closer look at how to divert grey water from y
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28th Jul 2025
Pumping Seawater? The XAJE80B and XAJE120B SteelPumps are a Surprisingly Great Choice
If you are looking for a seawater pump, the XAJE B SteelPump range is a great option. While not designed specifically as a marine pump they have proved to be very capable. We’ve seen these pumps survive years of salty conditions with no major issues, and they’re honestly one of the best value for money options around right now. Plus, they are one of the few easily repairable pumps on the market today where all the components can be sourced easily in the UK.
If you’re looking fo
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17th Jul 2025
Keep Your Rainwater System Flowing Smoothly All Year Long
Introducing the RainForce Home Mains Water Top-up Kit from 3P Technik UK. The RainForce ensures that you can continue to flush your toilets, wash vehicles and keep washing machines running come rain or shine!
It’s a great feeling to have a Rainwater harvesting system installed for your home. All that free rainwater to use whenever you need it. During dry summers however, you can quickly wish you were back on mains water so you don't have to worry about flushing the toilets or carrying heav
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10th Jul 2025
Mac3 Quickstop Advanced Float Valves Explained
Mac3 Quickstop Advanced Float Valves Explained (‘Standard’ and ‘Adjustable’ models)
The faster alternative to the Traditional Ball Float Valves
Unlike the traditional brass ball float valves that gradually open and close as the water level changes, Quickstop Advanced Float Valves have a unique hydraulic design, that opens and closes immediately. This fast action mechanism means that the water flow is either on or off, eliminating any periods of gradual increase and decrea
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30th May 2025
How to Choose the Right Float Switch for the Job
The Mac3 Brand is well known for its float switches and for good reason. Since developing the first float switch in 1971, Mac3 have gone on to develop a comprehensive range of high-quality float switches for use in many different situations.
What do Float Switches Do?
In simple terms, a float switch is used to monitor the level of a contained liquid, so that a subsequent action can automatically be triggered when the liquid rises or falls within designated levels. For example, to start/stop a pu
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12th May 2025
Battery Powered Water Level Monitor
MacNivel Battery Powered Water Level Monitor – the simple way to monitor water levels (and other liquids) in your tank.
The MacNivel is a simple device that indicates the level of water (and other suitable liquids) contained in a storage tank. It’s compact size, economical price and battery power, make the MacNivel an extremely versatile option for many installations. Ideal for use in camper vans, caravans, mobile Water Bowsers, to name just a few.
How the battery powered water leve
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7th Mar 2025
Compact SuDS treatment for driveways
If you need to treat the runoff from a driveway prior to discharge to main foul sewer for your SuDS planning application but don’t have space for a swale, we have a solution for you.
We were recently approached by a SuDS consultant who had a customer that needed to treat driveway runoff but had room for any swale or other green infrastructure SuDS solution. We specified a HydroSystem 400. This upflow filter has the highest treatment performance, exceeding all UK Mitigation Indices. The mu
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23rd Aug 2024
SuDS Storage Solutions for New Build Projects
If you require to store rainwater runoff as part of your SuDS scheme for sign off for your Sustainable Drainage for planning, we have many solutions available to you.
A recent example, a customer required a 2400L SuDS attenuation system for a new build home in England. The customer had minimal area for storage. A conventional round storage tank simply would take up too much space. They were looking for a compact water storage system that could be placed near the wall of the building.&
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23rd Aug 2024