what's the difference between a 10", 12" & 14" toilet rough-in? Difference in rough-in size is the distance from the finished wall to the center of the sewer outlet for the toilet. Prior to the mid 1930's tanks were hung on the wall. The 10" or 14" sewer outlet depended upon the piping used to connect the tank to the bowl. The 12" rough became the norm, when tank & bowls were connected together w/out the use of piping.

how do 1.6 GPF toilets differ from older model toilets? Since a 1.6 GPF toilet is designed to flush w/ less water, you'll notice all the water does not leave the tank upon flushing. You'll also notice the water spot in the bowl is smaller, since less water is needed to operate the toilet efficiently. The toilet will operate optimally if all contents are placed w/in the water spot of the bowl & not on the china sides.

what's the difference between gravity-fed & pressure assisted toilets? Traditional toilet flush is gravity-fed. All the water stored in the tank rushes down, forcing everything out through a built-in pipe called the trap. The trap curves down, then up like an elbow. Water fills it to keep sewer gases from entering the house. There is an alternative flush type called pressure-assisted. A vessel inside the tank holds trapped, compressed air. It acts like a spring to shoot the water forward at a high rate of speed. A large percentage of the 1.6 gallons of water used is delivered directly to a jet at the bottom of the bowl. The jet is very powerful & is the force that removes the waste.

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