3500 Litres Super Complete Rainwater Harvesting System

The 3500 Litres Super Complete Rainwater Harvesting System is a fully integrated, UK-manufactured solution designed to significantly reduce household water bills while supporting a more sustainable lifestyle. Natural rainwater is ideal for gardening, outdoor cleaning and toilet flushing—an activity that accounts for around 35% of household water usage. By capturing and storing rainfall, this system not only lowers mains water consumption but also helps reduce surface flooding during periods of heavy rain. Made from high-grade, rotationally moulded MDPE, the 3500L underground tank delivers exceptional durability, strength and long-term reliability. Designed for easy installation and maintenance, it includes integrated lifting eyes and full compatibility with UK-standard 4" (110mm) pipe fittings. With a powerful pump, filtration unit, pipework and connectors supplied, this complete system provides everything needed for an effective, long-lasting and eco-friendly rainwater harvesting setup for home and garden use.

Technical Specification

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• Complete 3500L rainwater harvesting system for domestic and garden applications
• UK-made from premium tank-grade MDPE
• Natural, chemical-free rainwater is ideal for plant watering and outdoor use
• Helps reduce mains water usage, lower bills and mitigate flooding
• Rotationally moulded for superior strength and durability
• Integrated lifting lugs for easier positioning and installation
• Compatible with standard UK 4" (110mm) pipe fittings
• Includes walk-on removable lid and extended neck
• 10-year warranty against manufacturing defects
• Included Pump (BPT1200SS)
• Maximum output: 61 litres/min
• Maximum head: 46m
• 1200W, 230V motor
• 19L stainless steel tank
• Operating pressure: 3 bar (43psi)
• Self-priming pump with auto pressure control
• Water-resistant on/off switch
• 1" outlet
• Pump Upgrade (CBM250SS)
• Maximum output: 100 litres/min
• Maximum head: 60m
• Longlife double-insulated impeller
• 24L stainless steel tank
• Auto start/stop for constant pressure
• Operating pressure: 3.5–5.2 bar (51–75psi)
• 1250W, 230V motor
• Underground Filter
• Durable MDPE construction
• Installs anywhere along the inlet pipe
• Accessible for easy cleaning
• Foot-traffic-only lid rating
• Back-Up in a Box (Optional)
• Automatically tops up tank when water levels run low
• Rainwater Harvesting Pipe
• 25m of 25mm pipe with green identification stripe
• Must be used under Water Regulations
• Underground Water Tank Dimensions
• Height: 1250mm
• Diameter: 2150mm
• Outlets: Up to 4"
• Access: 16" lid
• Weight: 72kg
• Capacity: 3500 litres
• Material: MDPE (Medium Density Polyethylene)
• System Includes
• Ecosure underground rainwater tank
• 25m of 25mm rainwater harvesting pipe
• Stainless steel water pump
• Walk-on removable lid
• Extended neck
• In-line filter box
• Brass foot valve
• Three 25mm pipe connectors
• 1" BSP isolator valve