Can I install a valve-type toilet with an old elevated type tank?

Question

Unfortunately my house does not have an attic, so I cannot put a large reservoir there, which would the ideal for running a valve-type (tankless) toilet.

Can I install instead one of those old fashion pull chain type type tanks (like in the "Godfather") high near the ceiling and then feed it to the valve on the toilet? Will that work, or does it require a higher drop?

Jim Stewart · Answer

Fifty years ago for two years I used one of those old fashioned elevated tanks about 7 ft or more above the toilet, and it flushed great, but was noisy. You gave a vigorous pull on a chain and it started a siphon.

However, this went directly into the toilet; it did not go through a valve as on a commercial toilet. I would bet those require 25 psi minimum and maybe 35 psi which would require 58 ft of head or 80 ft, respectively.

commercial toilet

Water supply specifications for a typical manual commercial toilet
  flush valve such as the Kohler K-13517 call for a static pressure of
  35 pounds per square inch and a flow of 25 gallons per minute.

Can I install a valve-type toilet with an old elevated type tank?

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