Greywater is gently used water from showers, baths, bathroom sinks, and washing machines. It does not include toilet water or kitchen sink waste.

*Aqua Gratis captures bath and shower water only, processes it and uses the greywater to flush toilets.

Yes. When treated with certified systems, greywater is safe for uses such as:

• Toilet flushing

• Garden/landscape irrigation

• Clothes washing (in some regions)

Modern systems include filtration and disinfection to ensure safety.

Most customers reuse greywater for:

• Flushing toilets

• Watering gardens

• Washing laundry

• Feeding irrigation systems

Some systems, like Aqua Gratis, also recover heat from shower water to reduce energy bills.

Typically 25–50% of your household’s potable water use. This means lower bills, greater drought resilience, and reduced environmental impact.

In the UK, yes.

Greywater reuse is permitted in many regions, but regulations vary. Most areas allow irrigation and toilet flushing when using an approved system. We can help you check local regulations during installation.

Not always.

• New builds: very easy and cost-effective to integrate.

• Retrofits: possible in most cases; you need to employ a plumber to assesses pipe access and space requirements.

Not at all. Treated greywater is supplied automatically to the toilets. You use bath, showers, and toilets, just as before.

A properly installed and maintained system produces odour-free treated water. Smells only occur when greywater sits untreated for too long — which modern systems are designed to prevent.

Minimal. Aqua Gratis is self-cleaning.

Aqua Gratis needs an annual service:

• Filter checks

• Water treatment top up

• The system is automated so there are alerts if a problem occurs.

Your home automatically switches back to mains water and the system safely bypasses unused greywater. You don’t need to do anything.

When you go on holiday set the system to Holiday Mode.

Costs depend on the type of home and installation complexity. Most customers recover the investment through:

• Reduced water bills

• Reduced energy use (if heat recovery is included)

• Increased property sustainability value

We can provide a personalised estimate.

Yes—especially if combined with heat recovery from shower water.

This can reduce hot-water energy use by 10–40%.

Sustainability features are increasingly in demand.

Greywater reuse can make your home more attractive to environmentally conscious buyers and reduce long-term running costs.

• Save water and money

• Reduce environmental impact

• Increase home resilience during droughts

• Lower energy use (with heat recovery)

• Contribute to sustainable urban water management