The Full Access Composting Toilet

An accessible, urine separating, twin vault toilet with wide application

Hollow Ash eco toiletThis toilet was developed to provide a fully accessible composting toilet on remote sites.

Urine is the biggest challenge for genuine composting toilets in the cold, damp UK climate. We have not found evaporation to be reliable and so we separate urine. The separation takes place in the pedestal and diverts urine to a small soak-away in the ground. It does not pass through the composting chamber. This avoids the need for the chamber to be above ground with long ramps for wheelchair access.

The capacity for continuous use is around 6 full time residents and we have single toilets servicing 200 plot allotments. The Full Access Composter can handle peak uses such as parties or weddings. Please contact us to confirm capacity for your application.

This is the toilet which established NatSol's reputation for excellent, odour free composting toilets and is the market leader for low to medium use remote sites.

Use links further down for information on building options.


Roll over the image to view features:-

composting toilets schematic


  • Easy clean, anti-fouling, urine diverting stainless steel pedestal.
  • Passive ventilation stack and wind cowl for odour free operation.
  • Generous twin chambers to allow good in-situ decomposition.
  • Full wheelchair accessibility (review as pdf).
  • Antiseptic hand-gel dispensers.
  • Ceramic waterless urinal with no blockage-prone trap or consumables.
  • Compost chamber forming floor and foundations for building.

How does it work?

NatSol Urine diverting compost toilet pedestalThe compost chamber usually extends 800mm below ground. It is divided into two sections used alternately on an annual cycle so that when compost is removed it is at least one year old and nicely decomposed. Rather than relying on evaporation, a method better suited to warmer climates, urine is diverted and sent to a soakaway. Click here for more details which help explain why we are the UK market leaders.

Maintaining your NatSol composting toilets

NatSol toilets are made from durable hygienic materials for long life and easy maintenance. The pedestal is stainless steel and shaped to minimise fouling. There is no water to freeze, no fan to fail and no moving parts. The only consumable other than loo paper is the soak which mops up any stray urine and helps decomposition by keeping the compost pile aerobic. Some installations have run for years without compost removal but we recommend an annual switch over and would suggest you allow two to three hours a year for two people to remove the mature compost and swap over the pedestal. You can download a Management booklet on maintaining the twin vault full access toilet.

Building options

The Full Access dry toilet is available with a standard NatSol timber or metal building. We can also provide bespoke buildings or just the toilet components to integrate into your own design. Please select a building type on the right of the page for more information.

Installing NatSol composting toilets

A twin vault composting toilet and NatSol building can be installed in one day by an experienced team on a typical site. Machinery is required for at least half a day. It can take a little longer if it is your first, or if the site is tricky or the weather adverse.

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