High Efficiency Toilets

[JR T.]

I have a number of multifamily buildings that are 100+ years old and in the market where they're located I pay for the water. One three unit building is using $1,200 per quarter in water. I believe part of the issue is the old toilets which use more water. Even when we've replaced the flappers if it doesn't drop down exactly right the toilet will run. 

What are my options for high efficiency toilets? Will the toilets that flush under a gallon each time be compatible with the varying 100 year old plumbing that is in these structures? I've seen toilets that do not have flappers in the $250 range - does whatever they're using wear out and allow the toilet to run? Any other ideas?

I'm willing to spend some money to upgrade these things because I will make it back on the water over time. Please help me figure out the best product for my needs. THANKS BP!

[David Dachtera]

There's a kit you can get - not sure what it's called - which pressurizes from the water supply pressure and is discharged by the flush handle. One good burst of pressure into the bowl, then it re-pressurizes itself from the water supply pressure.

Might be worth exploring.

Replacing flappers can sometimes require replacing what it seats into so it seals properly and allows the tank to fill.

I've also seen issues where, even when the tank is filled to overflowing (down the tube), the water valve takes too long to shut off. Where I worked most recently, the water drained down the overflow tube for almost three minutes before the water valve finally shut off. As of June 2, it was still not fixed.