Rainwater Harvesting Systems are becoming more frequent consideratinos for new build developments and refurbishments. A rainwater Harvesting system is a relativley simple system that can have multiple human and environmental benifits including reduction of water shortages, reduced mains water consumption (and subsequent reduced bills) and control of surface water run off (which helps reduce flooding).

Requirements for a rainwater harvesting system:

• Rainwater must be collected from a roof (except green roofs), ground water is too dirty
• Rainwater must be filtered for debris before entering the tank
• Rainwater must be stored at a low, stable temperature to avoid bacterial growth or freezing (underground)
• Rainwater must be kept away from light to avoid algae growth (underground)
• Rainwater must be controlled upon entry to avoid disturbance of sediment within the tank
• The rainwater tank must be smooth internally to avoid the chance of bacterial growth
• The rainwater must be filtered again before being pumped, typically by a 0.5mm filter
• The rainwater is best not being stored in a warmer tank in a loft which can reduce the water quality

• Flushing toilets
• Washing clothes
• Watering the garden
• Washing the car

Using rainwater harvesting for the above activities can reduce your household water consumption by 50%

We use direct pressure systems as they avoid the need for a secondary tank which reduces cost and can also reduce water quality.

A direct pressure system is where water is collected from the roof of a building (or surface water run off in certain circumstances) and then pumped from the main holding tank (above or below ground) directly to a non portable appliance; i.e. when a toilet is flushed or valve has been opened.