3P Technik Rain Tank System – Complete Scalable Garden Rainwater Harvesting

The 3P Technik Rain Tank System is the best-selling complete rainwater harvesting solution for domestic and professional garden use. Combining high-capacity 800 litre wall tanks with an automatic SteelPump, downpipe Filter Collector, inter-tank connectors, and a water level gauge, this pre-specified bundle delivers everything required to capture, store, and distribute harvested rainwater from a single, convenient purchase. The system is fully scalable from 800 litres up to 4,000 litres, making it appropriate for small suburban gardens through to large properties, smallholdings, and commercial growing operations.

What Is Included in the 3P Technik Rain Tank System

Every Rain Tank System is supplied as a complete, ready-to-install bundle. The number of 800 litre wall tanks supplied corresponds to the system size selected, and all inter-tank connection hardware is included in the kit.

• 800 litre 3P Technik wall tank(s) — one per 800 litres of chosen capacity, in the selected colour
• Black downpipe Filter Collector for UK-standard downpipes — alternative colours available on request
• SteelPump (XAJE80BRH) with multi-hosetail reducer and carry handle for demand-driven water delivery
• Tank-to-Pump Connection Kit to link the pump directly to the tank outlet
• Tank-to-Tank Connector(s) to chain multiple tanks for increased storage capacity
• Tank Water Level Gauge to monitor stored rainwater at a glance

Tank Technical Specification

The 3P Technik 800 litre wall tank is the class-leading design in the UK market. Its slim, space-efficient form accommodates a genuine 800 litres of rainwater while fitting neatly against walls, outbuildings, and fences with a footprint of just 80cm wide by 60cm deep. Walls are 8mm thick for professional-grade structural integrity, and all connection points use ¾" BSP brass threads for durable, leak-free connections. Tanks are manufactured from UV-stabilised, recyclable polyethylene.

• Tank dimensions: 179cm tall, 80cm wide, 60cm deep
• Available tank colours: Black, Sand, Granite, Blue Grey Granite, and Green
• System sizes available: 800L, 1600L, 2400L, 3200L, and 4000L
• 3 x ¾" BSP brass connection points per tank
• Wall fixing bracket, multi-hole-saw set, and rubber grommets included with each tank

Applications and Usage

This system is designed for garden irrigation — watering lawns, borders, vegetable plots, greenhouse crops, and container plants with naturally soft, chlorine-free rainwater. The automatic SteelPump provides strong, consistent water pressure for hose connections, drip irrigation lines, and sprinkler systems, and starts and stops automatically on demand. Landscape contractors, horticulturists, and property managers who need to reduce mains water consumption will find the 3P Technik Rain Tank System a practical and cost-effective route to on-site water management at scale.

Learn more about 3P Technik products here.