david1701smith

Good rule of thumb, never reduce in the direction of flow, lol. Seriously, when the first low consumption toilets hit the market they were a 'work in progress'...the government put a mandate, the mfg's did their best but the first few years of mfg these things caused a lot of headaches. In the last couple years they have begun making a 'class 5' flush, a bigger trap on the toilet, these things work great, variety of mfgs but generally any class 5 flush toilet is gonna solve your problem...don't decrease in direction of flow !!!