Toto TMT1NNC Installation Manual Download Page 3

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6)  Before the water supply is turned on, be sure all stop 

valves to the flush valves are closed off tightly. The stop 
valves can be opened and closed by using the adjust-
ment screw located at the center of the stop valve cap 

G,

 

behind the adjustment screw cover if already installed. 
Stop valve adjustments can only be made by using the 
adjustment screw. If for any reason, it becomes necessary 
to remove the stop valve cap 

G

, be certain that the water 

is shut off at the main supply valve.

     For new installations, we recommend the following steps:
    • Shut off stop valve and remove flushometer cover.
    •  Lift out the piston valve. Install the flushometer cover 

and open the stop valve to flush the line of any debris 
and sediment.

     After completion, shut off the stop valve, remove the 

flushometer cover and reinstall the piston valve. Reinstall 
the flushometer cover securely. Open the stop valve and 
activate the flushometer valve.

7)  Flushometer valves are preset for fixture volume as 

marked on the valve cartons. The valve does  not require 
adjustment for variations in water pressure within its 
operating range. To set the flushometer valve for proper 
operation, open the stop valve completely by turning the 
adjustment screw and flush the Flushometer valve sev-
eral times. Gradually adjust the stop valve down, using 
the adjustment screw, so that the rate of water flow into 
the fixture is not excessive, yet is sufficient to adequately 
evacuate the waste. The final setting for urinals should be 
such that the fixture will not overflow when the valve is 
actuated several times in succession. 

8)  The stop cap screw cover should be replaced and tightly 

secured after final adjustments have been made. 

SPECIFICATIONS

Flush volume: 
TMT1NNC - 6.0 LPF (1.6 GPF) 
TMW1NNC - 13.3 LPF (3.5 GPF) 
TMU1NNC - 3.8 LPF (1.0 GPF)

Protect the chrome or special finish of the flushometer. DO NOT USE TOOTHED TOOLS TO INSTALL OR SERVICE THE 
VALVE.
A non-hold open feature is standard on these valves

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