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Old 10-31-2012, 08:25 PM   #1
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Ok I have a ? for all the plumbing guru's


I am not a plumber although I have done my fair share of plumbing in my time. I have even washed down a new 2" well 60' and installed a packer-jet/foot valve and plumbed various faucets etc.

But the biggest peeve I have is about toilet tanks. Why? Somebody please explain to me WHY manufacturers make toilet tanks that do not drain completly when flushed? It would sure make it a lot easier to replace the fill valve if the entire amount of water drained instead of leaving a half inch in the tank that you either let go when you remove the fill valve or sponge out first.

Ok I admit that its a silly question, but I really would like to know!

SK

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Old 10-31-2012, 08:48 PM   #2
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The newer models are worse. All in the name of conservation.

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Old 10-31-2012, 10:39 PM   #3
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If it bothers you that much- get a tankless toilet

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Old 11-01-2012, 10:08 AM   #4
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shop vac, ten seconds, no problem.
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Old 11-01-2012, 12:51 PM   #5
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Ok I have a ? for all the plumbing guru's


the lip of the flush valve is raised to make sure it is at least 1 inch above the top of the toilet bowl in case the toilet backs up it will overflow onto the floor and not into the tank. a sponge used to take about a min to empty the tank of the extra water, shop vac works in less time if you don't count dragging it out and hooking it up.
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Old 11-01-2012, 09:01 PM   #6
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The tank bottom needs to be thicker around the large hole where water drains into the toilet, for adequate strength. In order to have a flat tank bottom to better rest on the back of the toilet bowl assembly, the extra thickness around the hole has to bulge upward into the tank interior.

Now you might ask, why not make the entire tank bottom thicker so the inside surface can be sloped towards the hole. Here we would have added weight (more difficult to carry and maneuver and install) and added cost (more materials needed).
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Old 11-01-2012, 09:58 PM   #7
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Ok, so two reasons, one for strength and one for backflow prevention. Ill go for that I guess, but it sure seems that after the last 100 years a better design couldnt be made. As bad as it gripes me I would rather repair my old 6 gallon or what ever it is vs buying one of those awful 1.6 gallon jobs. Hey, I'm all for saving the planet but I would much rather have the old one than the new one you have to flush 4 or 5 times to get the job done.
I guess I'm getting cantankerous in my old age.

SK
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Old 11-01-2012, 10:49 PM   #8
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Ok I have a ? for all the plumbing guru's


The toilet bowl is NOT going to back up into the tank ever, unless you completely seal the bowl off from the room. Come on.


They make flush valves that are lower profile. We've got some at our shop that we use for rebuilds. I think they might leave less than 3/8" of water in the bottom of the tank. A small rag will soak most of that up.

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