Oasis Rainwater Harvesters

Saves the maximum possible amount of water, nothing can beat the ‘Interflush™’. The user stops the flush just as soon as the pan is clear. Zero amount of water is wasted. Using any less water would mean the toilet needs flushing again.

The most cost effective way to save.  Short payback time measured in weeks not years. No need to buy a new toilet suite or even a new siphon.

Simply fits on top of siphon, no need to even turn the water off.

If you consider yourself to be a competent person, you should be able to fit your Interflush™ in less than half an hour.

Has a guaranteed ‘trailing volume’ with unique adjustment to increase this volume for troublesome drain lines, thereby eliminating drain line blockages associated with existing low volume flush devices.

Designed to fit the maximum number of different siphons and cisterns with front mounted handles.

Much easier and simpler than any other device to use. Just press, HOLD until clear, let go (all in one hand operation). Ends user confusion and consequent waste of water associated with other devices. Nothing could be simpler.

Easy to learn operation, no memory skills required. Self-teaching, if the handle is released early through force of habit, it stops flushing, prompting the user to press the handle again. Tests show that correct and consistent operation is embedded or learnt after only 17 flushes. Because other devices give the user a choice, reliance on memory becomes a factor in user operation and sometimes the correct operation is never embedded. The ‘Interflush™’ has been deliberately designed to have the shortest learning curve of all devices.

Toilets have overflows because inlet valves leak.
A valve that will never leak cannot be made.

Valve flushing devices were outlawed in Britain in 1861, after Thomas Crapper and others introduced ‘The water-waste preventerr’ or common siphon as we know it, but made legal again in 1999 under dubious circumstances. Materials may have changed but the laws of physics have not.

Valve flushing devices have undergone 150 years of development in America and they still leak. The siphon can never leak.

At any one time in America, one in five valve flushing toilets leak at a rate of 20,000 gallons per year. Adding all the lesser leaking toilets to this and text books equate this to 15 to 30 litres per day for every person in America. (Population 450million).

Valve manufacturers do not deny the fact that their devices leak. When asked the question, ‘but don’t these valve flushing devices leak?’, a chief executive of one of the largest valve manufacturers in America, replied, ‘of course they leak, that’s why we sell so many’. With attitudes like these to resource conservation, in the face of the threat from climate change and global warming, it is not surprising that America did not sign up to the ‘Kyoto’ agreement.

How then, is the valve displacing the siphon, everywhere?

First, because the siphon has been largely maintenance free and totally leak free, people have wrongly assumed that any other device in the cistern will offer the same ‘fit and forget’ benefits. Such is the faith in the siphon that ‘boxed in’ cisterns have been a feature of bathroom design for some time now.

Second, because people believe that whatever device is in the cistern, ‘it will be alright’; people choose a toilet entirely on its cosmetic appearance. Hence toilets with ‘simple push button control’ or even ‘no touch’ sensor control are ‘all the rage’; people can’t get enough of the ‘latest technology’, a salesman’s dream. People don’t even bother to ask what is inside the cistern.

Third, once a valve toilet has been purchased, a siphon cannot later be fitted. The outlet diameter is different and there is no hole in the cistern to accommodate a flush handle. This is not an accident of design. The hapless purchaser finds himself locked in to buying ‘repair kits’ (as intended by the valve manufacturers) or worse still; just putting up with a toilet, which constantly leaks water and money down the drain.

So, a combination of slick marketing by powerful companies and the blissful ignorance of consumers, has led to the displacement of the siphon by the valve, worldwide. Even British siphon manufacturers now make valve-flushing devices; such is the strength of misguided consumer demand.

For an independent detailed analysis download the ‘WCs; best practice since the Water Fittings Regulations 1999’, from elemental solutions, which was written before the interflush was conceived and before interruptible flushing was legalised. See also, ‘Water-efficient WCs and retrofits’

Waste Tech Environmental Ltd

                  Tel 01757 288022

                  Email wastetech@eircom.net