This project is continued from Part 4.
The Fluidmaster Fill Valve kit includes a new flapper (top item in the photo below), but I couldn’t use it because the mounting ears on the overflow pipe appeared to be permanent attached and didn’t fit the Fluidmaster flapper. I therefore chose to keep the Korky® Toilet Flapper as it was in very good condition.
Install the flapper – either old or new one as it suits you – and reconnect the lift chain to the tank level. For details see this How To article.
Verify the flapper valve falls completely closed and the lift chain is slightly slack.
Press the flush handle a few times and see that everything works smoothly with the flapper raising and falling freely.
Critical Level Mark
Is the water supply still shut off? Excellent! Verify the “critical level” mark on the fill valve is a minimum of 1 inch above the top of the fill tube to comply with code requirements. If the critical level is too low, the valve height needs to be adjusted. The “official” way to adjust the height is uninstall the fill valve and turn the shank to lengthen the fill valve. “Bwuh what?! But I just installed the d*mn thing! I’d have unscrew all the connections and remove the valve!” There is a simple shortcut:
- Verify the water supply valve is shut off.
- Lift the lock ring up the shank body.
- Grasp the gray valve body above the threaded shank – do not pull on the float cup or black valve cap.
- Pull the valve body to lengthen the valve height – you’ll hear/feel a couple of clicks.
- Slide the lock ring back down into place. Double check the lock ring is securely in its original place.
Remember – the lock ring is the only thing holding the valve body onto the shank.
Flush Testing and Tuning
Turn on the water supply and check for leaks as the tank fills with water. Gently tighten any connections if you find a leak. The new fill valve and water level should look like this photo.
Flush the toilet to verify the cycle works correctly. Water exits the fill valve near the bottom and the refill tube fills the bowl.
Adjust the Tank Water Level
The water level line should be marked by the manufacturer on the back of the tank. If not, the water level should be about 1 inch below the top of the overflow pipe.
To raise or lower the water in the tank, turn the adjustment screw on the fill valve. This screw and rod controls the distance between the valve arm and the float cup. Flush the toilet to verify the final water level.
An alternate perspective of the finished job.
Check the connections again and after one hour to be certain there are no leaks. Tighten any leaking connections as needed.
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