One of the scourges the environmental movement has inflicted on us is the low-flow toilet, which reduce flushing power to conserve water. (ASIDE: Of course, at the same time, they have inflicted other policies — such as mandatory washing of garbage for recycling purposes — that waste water. The important thing, I guess, is to lower living standards.) Since 1994, all new residential toilets have been required to use no more than 1.6 gallons per flush. The law was extended to commercial buildings in 1997.
As everyone who has used them knows, low-flow toilets are often ineffective. One strategy to improve their performance is to release the water under high pressure.
Problem: high-pressure toilets can explode.