QUICK Install Guide
K-400A-023
MANSFIELD ® REPAIR KIT
*See back page for important legal information.
HOW-TO VIDEO
VISIT: FLUIDMASTER.COM
K-400A-023 PRODUCT PAGE
INSTALL WITH CONFIDENCE
GETTING STARTED
PARTS OVERVIEW
TOOLS NEEDED
TOP DOWN VIEW
STEP 1: PREPARE TANK
A: TURN OFF WATER
B: DRAIN WATER
Flush the toilet to drain most of the water from the tank.
C: USE SPONGE OR TOWEL TO SOAK UP
EXCESS WATER IN TANK
TEP 2: REMOVE OLD FILL VALVE
A: REMOVE CONNECTOR
Remove water supply connector from bottom of fill valve by twisting connector nut to the left (clockwise).
NOTE: Inspect water supply connector. Replace it if it is worn, or you don’t know how old it is, to prevent flooding and property damage.
B: REMOVE OLD LOCKNUT
Below tank, twist locknut to the left (clockwise) to remove from fill valve.
C: REMOVE OLD FILL VALVE
Including refill tube and shank washer. Drain any excess water into the bucket by removing the fill valve from the tank.(Pull fill valve up)
STEP 3: REMOVE FLUSH VALVE
A: REMOVE STOP CAP (a) FROM FLUSH VALVE Twist left (counterclockwise) to remove
B: REMOVE FLUSH VALVE TUBE
Pull up on flush valve tube while sliding lever arm from the flush valve loop.
NOTE: Loosen locknut (a) on a lever. If the lever has a chain, detach now.
C: REMOVE RED SEAL
Pull from top groove and discard.
STEP 4: INSTALL NEW SEAL
A: REPLACE RED SEAL
Be sure the seal is positioned in the very top groove at bottom of the flush valve tower.
Proceed to Step 4B only if keeping your original lever. If replacing lever, proceed to Step 5A.
B: ATTACH LEVER TO FLUSH VALVE TUBE
Thread lever through flush valve loop while replacing tube onto the tower.
Hand-tighten locknut. Do not overtighten. If reattaching the original chain, clip to the lever hole. Proceed to Step 5D.
STEP 5: REMOVE AND REPLACE OLD LEVER
A: REMOVE LEVER
Unscrew the tank lever nut by twisting counterclockwise, removing nut, and pulling the lever from the tank.
NOTE: May require pliers if stuck.
B: INSTALL NEW LEVER
Slide lever through tank hole. Slip locknut over lever arm (flat side of nut facing handle). Loosely hand-tighten locknut clockwise (reverse thread). 
C: ATTACH LEVER TO FLUSH VALVE TUBE
Thread lever arm through flush valve loop while replacing tube onto tower. If reattaching original chain, clip to lever hole.
Hand-tighten locknut fully. Do not overtighten.
D: REPLACE FLUSH VALVE STOP CAP
Twist stop-cap (a) right (clockwise) to secure. Hand-tighten only. Do not overtighten.
STEP 6: ADJUST HEIGHT OF NEW FILL VALVE
A: TWIST FILL VALVE TO ADJUST HEIGHT Top of fill valve cap should measure roughly 3″ above top of overflow pipe when installed.
NOTE: Increasing height allows more water to fill in the tank.
* The top of the overflow pipe must be a minimum of 1″ below tank lever hole.
STEP 7: INSTALL NEW FILL VALVE
A: PUSH REFILL TUBE ONTO FILL VALVE REFILL PORT
B: INSERT FILL VALVE
Position refill tube to face flush valve making sure fill valve parts do not interfere with lever arm*.
C: ATTACH REFILL CLIP TO OVERFLOW PIPE
Note: If the refill tube is too long to fit inside the tank with the lid closed, remove the refill tube from the fill valve refill port, cut the tube, and reattach to the port.
D: INSTALL LOCKNUT
Screw locknut to the right (counterclockwise) onto fill valve shank (below the tank).
**Hand-tighten only. DO NOT OVERTIGHTEN.
* Make sure the float cup does not touch the tank walls or tank lever and flush valve.
* * Overtightening may crack the fill valve or tank causing flooding.
STEP 8: FINISHING STEPS
A: ATTACH WATER SUPPLY CONNECTOR TO FILL VALVE
Twist to the right (counterclockwise)
*Hand-tighten only.
DO NOT OVERTIGHTEN.
B: TURN ON WATER
Check for leaks.
C: WATER LEVEL
After the tank stops filling, water level should fill the tank to roughly ½ inch below top of the overflow pipe to ensure a proper flush. (Does not need to be exact.)
* Overtightening may crack the fill valve or tank causing flooding.
** The top of the overflow pipe must be a minimum of 1″ below tank lever hole.
STEP 9: FINE-TUNE TANK WATER LEVEL
A: FLUSH THE TOILET TO CHECK THE TANK WATER LEVEL
After the water stops filling the tank, the water level should be roughly ½ inch below the top of the overflow pipe to ensure a proper flush.
B: WATER LEVEL IS TOO LOW
Turn the tank water level adjustment screw clockwise to raise the float. Flush to reset water level.
WATER LEVEL IS TOO HIGH
Turn the water level adjustment screw counterclockwise to lower the float. Flush to reset water level.
STEP 10: FLUSH THE TOILET
A: FLUSH THE TOILET
If you’re satisfied with the flush, YOU’RE DONE!
YOU DID IT!
We knew you could! Share your success story with friends and family!
#FixedMyToilet
#Fluidmaster
Still not working exactly right?
See the next page for Troubleshooting.
TROUBLESHOOTING
IF THE FILL VALVE:
- DOES NOT TURN ON
- WON’T TURN OFF
- WON’T REFILL TANK
REMOVE CAP AND CHECK FOR DEBRIS
A: Turn off water supply.
B: Flush toilet.
C: With right-hand push float up, grip, and hold shaft under a float.
D: With left-hand twist cap and lever arm counterclockwise to unlock the cap. Let cap hang on float cup.
E: Hold empty cup upside down over uncapped valve to prevent splashing.
F: Turn the water supply on and off a few times.
G: Turn the water supply off.
H: Replace the valve cap.
• Place cap assembly on top of the gray valve body by aligning cap arm and adjustment rod next to refill tube.
• Press down on the top cap while rotating top & arm clockwise to the locked position.
See Our Troubleshooting
HOW-TO VIDEO
http://bit.ly/2yAdZn7
REPLACE FILL VALVE SEAL
A: Remove cap (see page 13).
B: Replace seal with a *genuine Fluidmaster 242 Seal.
C: Replace the valve cap.
• Place cap assembly on top of the gray valve body by aligning cap arm and adjustment rod next to refill tube.
• Press down on the top cap while rotating top & arm clockwise to the locked position.
* Always use genuine Fluidmaster parts when installing or repairing. Fluidmaster will not be responsible or liable for use of non-Fluidmaster parts during installation or repair.
WATER LEVEL IN THE BOWL IS TOO LOW
A: WATER FROM REFILL TUBE MUST FLOW THROUGH OVERFLOW PIPE
Make sure the refill tube is supplying water down the overflow pipe.
B: WATER LEVEL IN-TANK MAY BE TOO LOW
1/2” below top of overflow pipe is recommended (see page 10).
ADDITIONAL QUESTIONS?
For installation assistance, contact our technical services department.
EMAIL, CHAT or CALL our toll-free number. www.fluidmaster.com/support
1-800-631-2011
Hours Available:
Monday – Friday
5:30 AM – 5:00 PM PST
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