toilet internal trapway


Old 04-11-03, 10:12 AM
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toilet internal trapway

what is standard size for a toilet trapway, i recently installed water saving toilet with a 1 7/8" trapway and want to make sure that i will not need 2 flushes everytime i use it. Any help at all would be greatly appreciated.
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Old 04-12-03, 05:13 AM
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To be honest with you, it's not necessarily the diameter of the trap that makes it work. They used to say a tennis ball should pass through but that can't be true with a 1 7/8" trap. What really matters is how they put the water through that trap. I have a 1.6 gallon flush standard toilet that I just put in and it really works well. It replaced a 3.5 gallon model that did not work properly from day 1. (almost always had to flush twice.) I tweaked everything on that old toilet that could possibly make it flush better to no avail. The new one is called a Toto and I like it. I guess were not in Kansas anymore.

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