Home

About

Contact Us

Products

Examples

Pros & Cons

FAQs

Links

Products:

---

COMPUS TWIN FULL ACCESS

COMPUS COMPACT

ABOVE GROUND & BESPOKE

SPARES

TECHNICAL

PRICES!

---

COMPUS TWIN FULL ACCESS

Two underground preformed vaults extend 800mm below ground and are used alternately on a minimum one year cycle. We help with statutory permissions, installation and management guidance. We continue to provide support after installation. This toilet is functionally very robust and does not depend on any particular climatic conditions or significant management time to perform reliably. For usage levels go to FAQs Question 6. For a full assessment of the Advantages of the COMPUS TWIN go to Pros & Cons

FIXTURES AND FITTINGS

A view inside the cubicle showing the toilet pedestal, ventilation duct, male urinal, hand disinfectant facility and grab rail fittings. We strongly recommend the hand gel disinfectant system which avoids the need for a water supply and basins which carry a risk of freezing and flood damage. Basins also reduce wheelchair turning space. The grab rails consist of a hinged bar for the rear wall serving both pedestal positions and handrails for each position. Grab rails can be added later if you do not have any disabled users at the time of purchase.
The two nearest floor hatches facilitate emptying of the finished compost and the rear hatch provides the alternative pedestal position. The standard ventilation system is passive. The wall mounted box contains soak - usually wood shavings - for putting down the toilet - see Technical Notes. Soak can be added by users or by a manager at the end of the day. The toilet pedestal is designed to minimise cleaning requirements. It separates urine from seated users by means of a stainless steel urine separator. We supply a conventional ceramic urinal for male use. Due to the remote siting of many of these installations we do not supply an alarm system usually required under building regulations for disabled access cubicles.

BUILDINGS We can supply two types of prefabricated building specifically designed to fit with the toilet components and to provide wheelchair accessibility. There is a timber framed, timber clad version with full lining [shown right] and a metal framed, metal clad building [shown at the top of this page] with timber lining. Both come with full installation instructions and the internal walls are templated to show fixing positions for grab rails etc. To see more examples go to the Examples page.

COMPLETE SYSTEM WITHOUT A BUILDING We can offer components for this toilet for those wishing to design and construct their own buildings. We supply the twin vault chamber and lid [which serves as the floor of the building], pedestal, urine separator, vent and all specialist components. We will help with general advice on building construction.

---

COMPUS COMPACT

We now have available a new compact toilet, the COMPUS COMPACT. This toilet is urine separating and can have either a fan driven or passive vent depending on circumstances. Wood shavings, or similar material, are added to the toilet after "number twos" and these solids are eventually emptied into an outdoor dedicated composting chamber to complete composting. If you have ever had to empty a wet chemical toilet you should find this much nicer to deal with. It's a good toilet for a private summer house, garden studio or other fairly low use situation with familiar users. The pedestal can be supplied in white at additional cost. Click below for link to:- Cubicle layout and other information

---

ABOVE GROUND & BESPOKE

We can assist self builders who want to construct above ground toilets. We have generic designs which we can assist in tailoring to your particular needs. We then supply appropriate components and can provide telephone support during the construction process. If you are thinking of designing a building and fitting composting toilets it is essential you contact us at an early stage - they are not like WCs! The example shown here is a privately owned garden pavilion with above ground vaults.

---

SPARES & COMPONENTS

Toilet pedestal and urine separator We supply the urine separating toilet pedestal to be used in Above Ground & Bespoke systems, the design of which we assist with.

Wall mounted soak box This fits behind the pedestal in the COMPUS TWIN system toilet and acts as a rest for the seat lid. It helps keep the cubicle clear of obstructions. It is now supplied as standard with our COMPUS TWIN FULL ACCESS installations.

GRC Soakaway Unit This GRC unit provides a ready made method for disposing of urine into the ground and takes less time to install than constructing a stone or hardcore soakaway. It is usually supplied with COMPUS TWIN FULL ACCESS toilets.

---

TECHNICAL

"Soak" - and the composting process. Whenever the toilet is used for defecation a small amount of soak material is added to the vault. Alternatively a suitable amount can be added at the end of the day by a manager. The purpose of soak is to [i] prevent the pile from becoming anaerobic by maintaining an open structure and soaking up excess moisture, [ii] adjust the carbon-nitrogen ratio by adding more carbon, [iii] cover the wastes. We will advise on a suitable soak material for the type of toilet you decide to purchase.

Using the compost
With the COMPUS TWIN system the vault which has been resting for a year or more is emptied before coming back into use. A small layer of compost is left in the bottom to supply decomposing organisms for the next cycle. The finished compost should be used or disposed of in accordance with Environment Agency and/or Local Authority guidelines or, in the absence of any official advice, further composting can be carried out in a dedicated composting facility on site before eventual use or disposal. Some human parasite eggs can survive for many years in compost and although these are generally only found in tropical or sub-tropical populations we advise against using finished compost on food crops. We will provide further advice if you purchase one of our toilets.

Urine separation.
Our toilets are urine separating. This is beneficial as it reduces the amount of soak material required and makes it possible to reduce vault size. It also avoids the need to drain the vaults and virtually eliminates any risk of ammonia smells. We do not rely on evaporation of urine as we do not think this to be reliable in the UK climate. Urine is a very useful fertiliser since it contains an almost perfect balance of plant nutrients. We usually advise on disposal of urine to ground, subject to any statutory requirements.

Consequently, you must inform us if you have high ground water or heavy clay or poorly draining soil. It may be necessary to carry out percolation tests and under extreme conditions to have a specially tanked vault.

Ventilation.
Passive or fan driven ventilation options are available. In the case of fully enclosed cubicles and toilets in buildings which have other functions we recommend fan driven ventilation using a 1W fan. This also supplies the cubicle ventilation required under building regulations. With remote toilets on, for instance, allotment sites we have never known a case where passive ventilation was not wholly adequate.

Statutory regulations
It is often necessary to have planning and building control approval from the local authority before installing composting toilets. Although the responsibility for acquiring these consents rests with you, the client, we are happy to assist in acquiring them and have considerable experience in so doing. No local authority has so far refused. Representatives from the Building Research Establishment have inspected several NatSol toilets to assist them in determining appropriate standards and regulations for composting toilet installations.

For further technical information try  FAQs.

---

PRICES

We don't put prices on our website. This is because most enquirers are not very familiar with composting toilet systems and may find it difficult to assess which product they require. Some of our systems are well suited to multi-user applications, such as allotment sites, and some only for low use, private applications. Sometimes we supply buildings, sometimes we don't. We prefer to discuss your requirements first and will only sell you a toilet if we consider it to be suited to your particular needs. In some cases it may be necessary to design a bespoke system.

Prices for our products are currently held for 2 months from the date of quotation.

We usually arrange carriage for our toilet systems and charge this at cost. We do not mark up carriage charges. Consequently, if the cost rises after the quotation we have no option but to pass this on.

If you are purchasing a wheelchair accessible toilet it should be possible to get a zero rating for VAT if more than 20% of your users are disabled OR if you are a registered charity OR if you are registered with the Inland Revenue for charitable purposes and have a gift aid number. Under some circumstances you may be able to reclaim VAT for up to 3 years after purchase.

Please call us on 01686 412653 or use the email form on the Contact page to get a price estimate or quotation. Thanks!