Calabash Sani Sleeve – Save water and money, whilst keeping your washroom smelling good!

Calabash Sani Sleeve – odour eliminating and water saving urinal hygiene system

Calabash Sani Sleeve system for mens urinals provides an effective and environmentally friendly means of dealing with the dual problems of smells and blockages in bowl urinals without the need for harmful chemicals and without the requirement for constant flushing.

The Sani Sleeve system deals with the processes leading to urinal smells and blockages more effectively than alternatives.



Featuring a patented odour lock design to stop bad odours escaping into your washroom, and bioenzymes to prevent the hardening of uric salt deposits, the Sani-Sleeve reduces the number of rinsing flushes to 4-6 per day withougt increasing maintenance costs or the use of chemical cleaning products.

Key benefits:

Prevents odours, keeping urinals looking good and smelling fresh. Cuts water use by 90-95%. Drastically reduces blockages. Improves hygiene. Eliminates the need for using cleaning chemicals.

Client feedback:

A first class product that does exactly what is promised. Our water bill has been reduced by at least 45% leading to large savings which more than cover initial outlay.

Institute of Directors (IOD)

Our product has reduced the blockage problem very significantly indeed, i.e. from 4/5 blockages per day to 2/3 blockages per month.

Deutsche Bank


Calabash is a licenced waste carrier.
Having achieved the ISO9001 & ISO14001 accreditations, and being awarded with the Safe Contractor Scheme, we meet all Health & Safety and Environmental Standards on and off site.


Contact Calabash

Send us a message regarding any aspect of your washroom services needs. If this is a non-urgent matter, one of our staff members should get back to you within 24 hours. For a priority response, include the word ‘Priority’ in your message or call us on 020 7371 9500.


Why do urinals smell?

Biofilm – the key problem is biofilm, a translucent film 0.1 mm thick derived from body fluids. It forms on the ceramic bowl and all pipe-work, but is particularly difficult to clean where it collects on the internal surface of the urinal waste outlet and trap above the water level.

The biofilm takes several weeks to form – that’s why waterless urinals, or new urinals, often operate without odour problems for several months. The naturally occurring bacteria which thrive on this biofilm are what cause the smell. Even bleach is not successful at killing them.

Reduction in water, for example using watermisers, usually leads to an increase in build up.

Leaking, staining and splashing – washers in urinal traps perish very quickly, causing leakage and staining outside of the trap – leading to bad smells. Odour also comes from urine that splashes on the walls and floor. When urine is left to dry it acts as a breeding ground for ‘bad’ bacteria that cause unpleasant odours.

Why do urinals suffer from build up in traps and pipes leading to blockages?

Our clients tell us that the unpredictability and frequency of blockages causes offence to both customers and staff alike.

Uric salt and limescale build up – every litre of urine contains some 5 grams of uric salt, which builds up into ‘sludge’. This mixes with the limescale, from the water flushing though, resulting in both bad smells and block- ages. Because uric salt is insoluble in water, usually continual flushing is required to physically move this ‘slurry’ along waste pipes to the drain.

Urinal blocks – these are supposed to mask the smell of urine and bacteria. Traditional urinal blocks reduce in size while exposed to air then stop shrinking when submersed in water. Pieces of the blocks fall into the waste trap, collecting in the uric sludge until they eventually cause a blockage.

What happens if the flush frequency is reduced without other measures?

Water is an important part of the urinal maintenance. Flushing physically moves along the “sludge” from uric salt build up in order to avoid blockages and smells. It also ensures urinals look and smell fresh. Unfortunately, most companies use an inordinate amount of water, flushing up to 4-6 times an hour, which equates to an average con- sumption of over 150,000 litres of water per annum per urinal. This is both expensive and environmentally dam- aging.

Watermisers – many companies have installed water management systems to reduce water consumption, without any other changes to the way they look after urinals. Unfortunately, without water physically moving it along, there is an increase in uric sludge build up, which increases occurrence of blockages dramatically.

Why do urinals look unpleasant?

The waste outlet in normal urinals usually remains in place for the life of the urinal. After a while, limescale and yellow urine deposits fur up the waste outlet so that it becomes unsightly. The scale becomes a breeding ground for foul bacteria, increasing smells, which makes cleaning and maintenance tasks even more unpleasant than is necessary. In many public establishments, the effects of stubbing out cigarettes in urinals means that the waste outlets look old, burned and sometimes even fragmented. Blocks or mats only add to the shabby appearance and the cycle of cleaning neglect is perpetuated.

Also, stains on the bowl itself are unsightly. These are usually caused by limescale build-up from water, because of the high frequency in flushing.

How does Sani-SleeveTM system elimitate bad smells?

The fully patented Sani-Sleeve eliminates smells immediately upon installation, by creating an airtight odour lock between the biofilm of the waste pipe and the washroom.

The plastic sleeve slots easily into the urinal, reaching into the water level, ensuring that water and urine now flow inside the sleeve. This in turn ensures that any build up of biofilm, uric salts or limescale lines the inside of the sleeve as opposed to the urinal pipework. Between 3-4 months, the sleeve is removed and replaced. In other words, we physically remove any biofilm build-up before it has the chance to smell, thus eliminating the problem at source.

The unit also emits a subtle lemon fragrance. It should be noted, though, that the product is designed to eliminate bad odours and not mask them with a heavy concentration of fragrance like many other products.

Leaking and staining – the sleeve lines the connection of the trap components, thus helping to reduce the seepage at this point. This is achieved because the fluids are funnelled through by the plastic sleeve. Also the acidic salt build up in the joints is reduced, so that perishing of the rubber seals is slower.

Why is the Sani-Sleeve system so effective at reducing blockages?

Our bespoke enzymes convert uric salts, making them water soluble – the domed top of the unit and the upper part of the Sani-Sleeve is filled with a gel block and coating. The gel has a combination of surfactants for foaming and washing, water softeners to help reduce limescale build up and friendly bacteria and their associated enzymes.

The friendly bacteria continue to thrive, producing enzymes for the life of the block (usually around three months). When the urinal is flushed the bacteria settle in the waste trap using their enzymes to breakdown the waste, which the bacteria use as food. This process converts uric salts from being insoluble in water to being soluble and easily flushed away with minimal water use.

Enzymes can be more effective than chemicals – because enzymes work in an entirely natural way without the use of chemicals, microbiological cleaning is the environmentally friendly but effective solution to many washroom problems. Chemicals mask odours rather than removing the ‘bad’ bacteria which cause the problems.

Why and how do you save water?

Sani-Sleeve requires only a modest amount of water. When water passes over the unit it activates the bacteria and enzymes in the block, as a result the water can be reduced to just 4 flushes a day. These flushes are important though and act to remove the small amount of now soluble debris and bring new bacteria and enzymes from the Enviro-Block into the trap and pipes – this is a clear differentiator from waterless systems, which frequently suffer from build up and blockages as a result.

With less frequent flushing your urinal uses less water, decreasing your water bill, so you save money!

What are the financial benefits of using the Sani-Sleeve system?

Sani-Sleeve should save the average user around £200.00 per annum per urinal. The majority of savings are achieved through reduced water consumption. Additional savings arise because urinal blocks and chemicals need no longer be used. In some instances, the most valuable impact of implementing the Sani-Sleeve system results from the significant reduction in blockages and associated charges for remedial maintenance.

Why is the Sani-Sleeve system different from other urinal products?

The unique Sani-Sleeve enables water flushing to be reduced to optimum level, allowing the enzymes to work ef- fectively. Without the Sani-Sleeve the reduced flushing would eventually lead to odour problems due to build up in the waste outlet above the water seal and blockage problems from build up in traps and pipes.
In conjunction with the water management system, the enzyme block ‘bleeds’ enzymes down the inner walls of the Sani-Sleeve at a steady rate. Excessive water flushing or chemical dosing simply washes away the enzymes and prevents them from working properly.

Why should I replace or change what I have?

Setting aside the likely cost savings, Sani-Sleeve is a ‘green’ urinal solution that provides an odour-free, low main- tenance, hygienic, pleasant environment for staff, visitors and other users of washroom alike. It has proved far more effective in dealing with urinal problems than all other methods.