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pcave
04-27-2007, 03:43 PM
I'm trying to cheaply replace a basement bathroom's floor-mounted, wall-outlet toilet, but everywhere I ask tells me it is a special order that will cost upwards of $700 with a 4-6 week lead time. SO, in the interest of saving time and money, I'm considering switching to a commercial toilet with a flush valve (ie. no tank).

My question is: How hard is it to plumb in a flush valve toilet? Do I just have to reroute the water supply from the existing tank shut-off valve to where the flush valve requires it? Or is larger pipe needed?

Second question: There's a jog in the wall behind the toilet (ie. a shelf). Can you usually extend the piece of pipe that goes from the flush valve to the wall? Would that be a problem?

Peter

jimbo
04-27-2007, 04:11 PM
Flushometer valves typically spec a 1" water supply line. It's not that they need any higher pressure than you have available, but they need a very high instantaneous GPM. So, it may not work.

Terry
04-27-2007, 04:53 PM
That's a lot more than I've been selling the Gerber floor mounted rear outlet toilet for, model 21-310, $399.00
Or the American Standard Yorkville for $499.00
These models use a Flushmate, and work with a 1/2" water supply.

Takes me a couple of days to get these in the Seattle area.

A commercial flushometer, with the 1" supply would need a new water meter, water service, and repiped 1" line to the toilet.
Not a cheap way to go.

specialist

Peanut9199
04-30-2007, 01:05 PM
There is also the Crane 3386 "Economiser".
http://www.craneplumbing.com/products/Default.aspx?prodNo=3836&lang=EN

Ikat
08-30-2009, 07:21 PM
Terry's report on "best low flush toilet" does not mention the American Standard Flemmington, which is only one of a few options for those of us with back outlet toilets. I've read that it is tricky to install, but nothing about its performance.

The other options I have are Kohler Barrington, which is not comfort height, and Duravit Starck, but I can't find reviews on them and am leery about installing something behind the tile that isn't "proven."

I don't know whether the Gerber rear exit comfort height has the problems being reported elsewhere on this site but that high a failure rate has pretty much put me off than brand.

Suggestions?

gusherb94
08-30-2009, 07:44 PM
An expansion tank could be plumbed in to get that "very high instantaneous GPM" without upsizing the houses water service. Pretty much that would be kinda like making a home made pressure assist toilet.

dinkledoodle
08-31-2009, 08:43 AM
Whenever I see "home made" and "toilet" in the same sentence, I worry...:D

Terry
08-31-2009, 09:44 AM
An expansion tank could be plumbed in to get that "very high instantaneous GPM" without upsizing the houses water service. Pretty much that would be kinda like making a home made pressure assist toilet.


You could pipe a one inch supply from an expansion tank.

So what looks better, an expansion tank in the room, or an enclosed tank using a Flushmate.
If it's about looks, being more commerical looking, you would need a place to set the expansion tank.
And it would need to be an expansion tank with 1" threads.


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