3P Rain Tank System
The 3P Rain Tank System is a complete garden rainwater harvesting kit built around the slim 800 litre Wall Tank. You choose the total capacity, from 1,600 litres with two tanks up to 4,000 litres with five tanks linked together. Because each tank is only 60cm deep, the system fits along a house wall, garage or fence without taking over the garden.
Everything you need comes in the kit. The Filter Collector fits your downpipe, cleans the rainwater and sends it into the tanks. Once the tanks are full, it returns the overflow to the drain. The Garden SteelPump then gives you pressurised water for a hose or sprinkler.
What’s in the kit
- 800 litre Wall Tank(s), one for every 800 litres of capacity, each with a tap
- Tank to tank connectors to link the tanks together
- Black Filter Collector for UK downpipes
- Garden SteelPump with multi-hosetail outlet and carry handle
- Tank to pump connection kit
- Tank water level gauge
- Rubber grommets, plus a wall fixing bracket and screws for each tank
Sizes and colours
This listing covers the 1,600, 2,400, 3,200 and 4,000 litre sizes, and a single tank 800 litre version is also available. You can choose Black, Granite, Sandstone or British Racing Green tanks. In addition, the Granite and Sandstone finishes have a fine fleck that looks like natural stone.
Wall Tank dimensions
- Each tank: 179cm tall, 80cm wide, 60cm deep
- Capacity per tank: 800 litres
- Three 3/4″ BSP brass threaded ports per tank
- 8mm thick walls, UV resistant polyethylene
Delivery
The system is delivered free to UK mainland addresses on a pallet with a tail lift. Larger systems may come on more than one pallet. Please tell us about any access restrictions when you order.












