Harlequin's Innovative Water Storage Solutions


By David Cole
5 min read

Harlequin's Innovative Water Storage Solutions

Unlock the Power of Rain: A Deep Dive into Harlequin HydroSure Tanks

In a world increasingly focused on sustainability and resource efficiency, managing our water usage has never been more critical. Enter Harlequin's HydroSure tank range – a smart, durable, and highly effective solution for harvesting and storing water. Whether you're a homeowner looking to green your garden or a business aiming for greater self-sufficiency, HydroSure tanks offer an impressive array of benefits. Let's explore what makes them a leading choice, along with some frequently asked questions.

What Makes Harlequin HydroSure Tanks Stand Out?

Harlequin, a renowned name in tank manufacturing, has engineered the HydroSure range with durability and performance at its core. These tanks are specifically designed for rainwater harvesting and general water storage, catering to both non-potable (non-drinking) and, in some cases, potable (drinking) applications.

Key Features You'll Love:

Robust Construction: Made from high-grade, seamless Medium Density Polyethylene (MDPE), HydroSure tanks are built to last. They're non-corrosive, highly impact-resistant, and UV-stabilised, ensuring they can withstand the UK's varied weather conditions for years to come.

Integrated Filtration: Many models, especially those for rainwater harvesting, come with built-in filters (often stainless steel mesh) that effectively prevent debris from entering the tank, ensuring cleaner water for your chosen application.

Calmed Inlet: A clever design element, the calmed inlet gently introduces water into the tank, reducing turbulence and preventing sediment at the bottom from being stirred up. This contributes to maintaining water quality.

Efficient Pumping Systems: For systems integrated with your home or irrigation, Harlequin often includes pressure-sensitive submersible pumps. These are designed to be energy-efficient, only operating when water is needed, and feature dry-run protection to prevent damage.

Ease of Installation: Harlequin designs its tanks with installation in mind. Features like moulded-in connections, lifting points, and adjustable turrets simplify the process for installers. Their "shallow dig" models can even reduce excavation costs and the need for concrete backfill.

Compliance & Certification: Peace of mind comes from knowing these tanks meet rigorous standards. Harlequin HydroSure systems often comply with relevant regulations like EN 16941-1:2018 and UK Building Regulations Part G for rainwater harvesting.

Versatility in Size and Type: Whether you need a discreet underground tank, a slimline tank for a tight space, or a large vertical tank for substantial storage, Harlequin offers a wide variety of capacities and configurations.

Benefits You Can Bank On

Choosing a Harlequin HydroSure tank isn't just about storing water; it's about investing in a more sustainable and cost-effective future.

  • Significant Cost Savings: By utilising rainwater for non-potable uses like toilet flushing, washing machines, garden watering, and car washing, you can drastically reduce your reliance on mains water and potentially cut your water bills by up to 50%.
  • Environmental Stewardship: Every drop of rainwater you harvest reduces the strain on public water supplies and infrastructure, contributing to a more sustainable water cycle and lowering your environmental footprint.
  • Enhanced Water Security: In times of water restrictions, such as hosepipe bans, or unexpected disruptions to the mains supply, your stored rainwater provides a valuable independent source.
  • Discreet & Aesthetic Solutions: Underground HydroSure tanks are particularly popular as they offer hidden water storage, preserving the beauty and usable space of your garden.
  • Low Maintenance: Thanks to their durable construction and integrated filtration, HydroSure tanks generally require minimal upkeep – often just a quick check and clean of the filter a few times a year.
  • Broad Applicability: These tanks are suitable for a diverse range of applications, from individual homes and smallholdings to larger commercial properties and agricultural settings.

Your HydroSure Questions Answered: Q&A

Let's address some common queries about Harlequin HydroSure tanks and rainwater harvesting in general.

Q1: Can I drink the water collected in a Harlequin HydroSure rainwater tank? A: Generally, no. While the filtration systems in HydroSure tanks effectively remove debris and particles, rainwater is typically considered non-potable and not suitable for drinking or cooking without further advanced treatment (e.g., UV sterilisation, extensive filtration) to meet potable water standards. Harlequin's rainwater harvesting systems are designed primarily for non-potable uses like toilet flushing, washing machines, and outdoor irrigation.

Q2: How much space do I need for a HydroSure tank? A: This depends on the tank type and capacity. Harlequin offers slimline vertical tanks for limited spaces and underground "shallow dig" tanks which minimise the visual impact and excavation depth. It's crucial to check the dimensions of your chosen model and consider access for installation.

Q3: Is installation complicated? Can I do it myself? A: While Harlequin designs for ease of installation, particularly for their shallow dig models, it is highly recommended to have a qualified professional install underground tanks and systems integrated with your home's plumbing. Proper site assessment, excavation, and connection to your existing systems are vital for optimal performance, safety, and warranty validity.

Q4: How much can I save on my water bills? A: Savings can be significant, with potential reductions of up to 50% on your metered water costs by switching non-potable uses to harvested rainwater. The exact savings will depend on your household's water consumption habits and current water rates.

Q5: What kind of maintenance do HydroSure tanks require? A: Harlequin HydroSure tanks are designed for low maintenance. Typically, you'll need to check and clean the integrated filter periodically, often every 3-6 months or as recommended in the manual. Some systems may require periodic desludging (emptying accumulated sediment) depending on usage and local conditions, though their design aims to minimise this.

Q6: What happens if the tank runs out of rainwater? A: Many advanced Harlequin HydroSure rainwater harvesting systems, particularly the "Home Harvest Direct" models, include a "backup in a box" unit or similar mains water top-up system. This automatically replenishes the tank with mains water when rainwater levels are low, ensuring a continuous supply for your appliances.

Q7: Are Harlequin HydroSure tanks resistant to freezing temperatures? A: Yes, Harlequin tanks are manufactured from durable MDPE which can withstand a wide range of temperatures. For underground tanks, the earth acts as natural insulation. For above-ground tanks in areas prone to severe freezes, insulation measures or ensuring sufficient water circulation might be considered, though standard construction is robust.

Q8: Do these tanks meet UK regulations? A: Yes, Harlequin HydroSure rainwater harvesting systems are designed to comply with relevant UK standards and building regulations, such as BS8515 Rainwater Harvesting Code of Practice and Building Regulations Part G. Always check the specific product's certifications.

Q9: How long do Harlequin HydroSure tanks last? A: Manufactured from high-quality, UV-stabilised MDPE, these tanks are incredibly durable. With proper installation and minimal maintenance, you can expect a lifespan of many decades, often exceeding 20-30 years.


The Harlequin HydroSure range represents a smart, forward-thinking approach to water management. By harnessing the power of rain, you're not just making an eco-conscious choice; you're investing in long-term savings and greater water independence for your property.