Fans of the late and great science fiction author Robert A Heinlein may recognise the acronym in this post's title: There Aint No Such Thing As A Free Lunch. Well, it appears that this principle also applies to water-saving.
Australia is currently afflicted with a long-standing drought that has lead to severe water restrictions and a rash of water-saving measures, including widespread proselytising about water-saving appliances and bathroomware. So converted, we purchased a 5-star toilet from Caroma with an integrated hand-basin. The idea is pretty new here in Ausi, but such toilets have been used in Japan for many years, and involves making the water used to fill the cistern available for washing the hands, thus serving a dual purpose. It's a great idea, but it's not related to this missing free lunch.
The other day I had a shower in our ensuite. Five minutes in and the drain began to bubble like a hot spring full of teenage boys after a baked bean lunch, which was curious, but not startling. However, once the water from the shower started to back up, and the toilet joined in with its own bubbles, I became concerned. The water took an hour to drain away, and the plumber (who came four days later), informed me that this is a very common problem. These days, with water-saving toilets (ours saves water not only by integrating the basin, but also by using very little water for each flush), there is insufficient water in the pipes to generate a decent flow, and hence blockages occur. It was fixed by dumping a few buckets of water into the toilet bowl and flushing, and I was advised to occassionally use the grey water from the shower to give the toilet a bit of a boost. And no half-flushing if any paper is involved, I was warned. The pride I had had in my throne, whose half-flush had until now handled anything we had thrown it, bubbled away in an instant, my hubris no more than a misguided phantom. We had succeeded only in blocking our drains, the solution to which was to use more water.
As an aside, our taps had also been configured for low flow, to save water. Apparently this wears out the valve. And rainwater tanks are loved by mosquitoes which multiply and fly their sorties laden with Ross River and Dengue Fevers.
Ah yes, even the noble practice of water-saving is not exempt from the law of TANSTAAFL.