Commercial toilet in residence.

[Dollar_Bill]

Building an extra room. Wife wanted a commercial, wall hung toilet. Said she is tired of celaning behind toilets that bolt to the floor. I miss, sometimes.

So I got her a nice commercial toilet. Problem is, it won't flush. We have a 3/4" line coming into the home and can't seem to get enough pressure/volume to flush.

I would pull it and replace with a tank type, but this was expensive toilet and I am not really sure I could find a tank type that would wall hang. Have poured a slab floor, and while I could saw through the slab and tie into the sewage line . . . . I don't want to.

I have replaced the valve with the highest flow I could find, don't tell the Water Police, no good. I am getting about 70 psi where the service line comes in, but a long way to the toilet.

I have heard that I might be able to put in an expansion tank in the attic and run a line to the toilet, but the tanks for water heaters are too small. I have considered a pressure tank like goes with a well pump, but they are expensive and the bladders won't handle very high pressure.

Sure would appreciate some ideas.

Bill
Atlanta

[LiQuId]

you need a 1" line minimum for a flush valve on a W.c.
thats the problem .

most houses do not have water lines big enough all the way to the bathroom which is a big reason you dont put a commercial toilet in a residential setting.

the 3/4 valve you have is intended for a urinal.

[LiQuId]

http://www.nextag.com/rear-outlet-toilet/stores-html

examples of what you can do... you may not get a "wall hung" toilet, but you could get a rear discharge toilet and not have to bust up cement.

[Dollar_Bill]

Originally Posted by LiQuId

you need a 1" line minimum for a flush valve on a W.c.
thats the problem .

most houses do not have water lines big enough all the way to the bathroom which is a big reason you dont put a commercial toilet in a residential setting.

the 3/4 valve you have is intended for a urinal.

Thanks. I understand that now, Can I put the one inch line up to a 1.6 gallon (or larger) expansion tank in the attic above and have the necessary volume to flush? I realize that another response suggests I use a rear discharge toilet. This is a good idea, but if any way possible, I would like to keep the wall hung commercial toilet I have now. It looks great! Just need to make it work.

[LiQuId]

What size is the supply line into your house? if its the usual 3/4 then you may have issues.

what is your intended perpose for this expansion tank ? you realize they are not water storage vessels but are used to combat expansion/contraction of water in a system ?

[phishfood]

I would say that if you use a large enough expansion/bladder tank, it should work. I don't know that a small expansion tank will do the trick, though. If I were to try this, I would use a small bladder tank meant for a well.

[Dollar_Bill]

Originally Posted by phishfood

I would say that if you use a large enough expansion/bladder tank, it should work. I don't know that a small expansion tank will do the trick, though. If I were to try this, I would use a small bladder tank meant for a well.

Thanks, Phishfood, I have this tank
http://www.flotecpump.com/ResidentialProduct_fl_hw_tk_FP7110.aspx

While the gallonage is more than I need (19gals) to flush the toilet, it is the smallest tank I could find that has a 1" NPT.

It would seem I can connect this in my system with my 3/4" supply and a 1" discharge to the toilet. My incoming pressure, through the aforementioned 3/4" supply is at about 75psi. I can adjust this pressure as needed. The tank has a pressure limit of 100psi and is pre-charged at 40psi.

Since this tank has only one inlet/outlet it would seem that I can bring the 3/4" line into a 1" "T", with a 1" pipe to the tank and the remaining opening of the "T" feeding down to the toilet through a 1" pipe.

I have a backflow preventer on my incoming supply line, would I need another backflow preventer at the tank?

Your kind suggestions are appreciated.

[johnjh2o]

What i think phishfood meant is to just install the tank in the system you don't have to run a line from the tank to the toilet.

John

[phishfood]

Actually, if I were attempting this, I would in fact run a 1" line from the bladder tank to the flush valve. Those water closet flush valves demand a lot of water in a very short time span, and I would bet that a 3/4" line wouldn't deliver enough.

I can't think of a reason that you would need a backflow preventor on the tank.

[Dollar_Bill]

I am gonna go with the bladder tank. Will let you know how it turns out.

Bill