Fluidmaster 400A User manual

*See back page for important legal information.
INSTALL WITH CONFIDENCE
QUICK Install Guide
400A FILL VALVE

3
GETTING STARTED
PARTS OVERVIEW
TOOLS NEEDED
Towel Bucket Sponge
Pliers
Locknut
Shank Washer
Refill Tube
Tank Water Level
Adjustment Screw
Refill Clip
Tank Water Level
Adjustment Screw

4
A: TURN OFF WATER
B: DRAIN WATER
Flush toilet to drain most of the water from the tank.
C: USE SPONGE OR TOWEL TO SOAK UP
EXCESS WATER IN TANK
FLUSH
STEP 1: PREPARE TANK
Towel
Sponge
5
LEFT
LEFT
A: REMOVE CONNECTOR
Remove water supply
connector from bottom of fill
valve by twisting connector
nut to the left (clockwise).
B: REMOVE OLD LOCKNUT
Below tank, twist locknut
to the left (clockwise) to
remove from fill valve.
C: REMOVE OLD FILL VALVE
Drain any excess water
into bucket by removing fill
valve from tank.
(Pull fill valve up)
STEP 2: REMOVE OLD FILL VALVE
Bucket
(Optional)
Pliers
(Optional)
TURN
CLOCKWISE

6 7
STEP 3: 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.
HOLD
TWIST
LEFT
TOP OF FILL VALVE CAP
TOP OF OVERFLOW PIPE
3"
Fill Valve Cap
Overflow Pipe

8 9
Refill Tube
Refill
Clip
Overflow
Pipe
STEP 4: INSTALL NEW FILL VALVE
F: ATTACH REFILL TUBE TO REFILL CLIP
Note: If refill tube is too long, cut tube.
E: INSTALL LOCKNUT
Screw locknut to the
right (counterclockwise)
onto fill valve shank
(below tank) RIGHT
A: INSTALL SHANK WASHER
Pull up to top of shank.
* Place shank washer
onto threaded shank of
fill valve. WIDE SIDE UP.
B: PUSH REFILL TUBE ONTO
REFILL PORT FIRST
C: ATTACH REFILL CLIP
TO OVERFLOW PIPE
D: INSERT FILL VALVE
Position refill tube to face
overflow pipe.
Shank Washer
Threaded Shank

10 11
A: ATTACH WATER
SUPPLY CONNECTOR
TO FILL VALVE
Twist to the right
(counterclockwise)
RIGHT
C: WATER LEVEL
After the tank stops filling, water level should fill the tank to
roughly ½ inch below top of overflow pipe to ensure a proper
flush.
STEP 5: FINISHING STEPS
TOP DOWN VIEW
TURN
COUNTER-
CLOCKWISE
See page 12 to fine-tune
TANK Water Level
1/2"
Water Level
Overflow Pipe
Top of
Overflow Pipe
B: TURN ON WATER
Check for leaks.
(See Troubleshooting for
leak solutions)

12 13
STEP 6: 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 overflow pipe to
ensure a proper flush.
1/2"
Overflow Pipe 1/2"
Water Level
Overflow Pipe
Top of
Overflow Pipe
Tank Water Level
Adjustment Screw
Float
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.
MORE
WATER
+
LESS
WATER
–
Tank Water Level
Adjustment Screw

14 15
STEP 7: FLUSH THE TOILET
A: FLUSH THE TOILET
If you’re satisfied with the flush, YOU’RE DONE!
Still not working exactly right?
See the next page for Troubleshooting.
YOU DID IT!
We knew you could!
Share your success story
with friends and family!
#FixedMyToilet
#Fluidmaster

16 17
TROUBLESHOOTING
See Our Troubleshooting
HOW-TO VIDEO
http://bit.ly/2yAdZn7
VIDEO
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 float.
D: With left hand twist cap and lever arm
counterclockwise to unlock cap. Let
cap hang on float cup.
E: Hold empty cup upside down over
uncapped valve to prevent splashing.
F: Turn water supply on and off a few
times.
G: Turn water supply off.
H: Replace valve cap.
TURN
COUNTER-
CLOCKWISE
• Place cap assembly on top of gray
valve body by aligning cap arm and
adjustment rod next to refill tube.
• Press down on top cap while rotating
top & arm clockwise to locked position.
IF THE FLOAT DOES NOT DROP WHEN FLUSHED
IF THE FILL VALVE TURNS ON AND OFF BY ITSELF
IF WATER SUPPLY CONNECTOR IS LEAKING
REPLACE FILL VALVE SEAL
CLEAN FLAPPER AND DRAIN SEAT
A: Remove cap (see page 16).
B: Replace seal with a genuine
Fluidmaster 242 Seal.
C: Replace valve cap.
A: The tank is losing water, clean the
flapper and drain seat for a better
seal.
B: Replace flapper.
C: If leak continues after replacing
flapper, replace flush valve (507AK,
or 540AKR) or repair flush valve seat
(555C).
A: Replace water supply line.
• Place cap assembly on top of gray
valve body by aligning cap arm and
adjustment rod next to refill tube.
• Press down on top cap while
rotating top & arm clockwise to
locked position.

18 19
TROUBLESHOOTING
A: WATER FROM REFILL TUBE
MUST FLOW THROUGH
OVERFLOW PIPE
Make sure the refill tube is
supplying water down overflow
pipe.
B: WATER LEVEL IN TANK MAY BE
TOO LOW
1/2” below top of overflow pipe is
recommended (see page 12).
C: FLAPPER MAY BE CLOSING
TOO SOON
Give flapper chain approximately
1/2” of slack.
WATER LEVEL IN BOWL IS TOO LOW
Overflow
Pipe
Refill Tube
1/2"
Overflow
Pipe
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

30800 Rancho Viejo Road, San Juan Capistrano, CA 92675
www.Fluidmaster.com • 800-631-2011
Contact Fluidmaster for troubleshooting help or visit www.Fluidmaster.com
M-F 5:30 am - 5:00 pm PST.
FM # 91623, Grev. 3, 11/17
WARNING
DO NOT USE IN-TANK DROP-IN TOILET BOWL CLEANERS CONTAINING BLEACH OR CHLORINE. Use of such products will: (1) RESULT IN
DAMAGE to tank components and MAY CAUSE FLOODING and PROPERTY DAMAGE and (2) VOID FLUIDMASTER WARRANTY.
Fluidmaster Flush ‘n Sparkle Toilet Bowl Cleaning System is recommended for those choosing to use in-tank bowl cleaners and
WILL NOT VOID the FLUIDMASTER WARRANTY because it will not damage the components. DO NOT overtighten nuts or tank/bowl
may crack. Always use quality Fluidmaster parts when installing or repairing. Fluidmaster will not be responsible or liable for use of
non-Fluidmaster parts during installation or repair.
LIMITED SEVEN-YEAR EXPRESS WARRANTY
Subject to the “Exclusions” set forth below, Fluidmaster Inc. promises to the consumer to repair, or at the option of Fluidmaster Inc.
to replace any part of this plumbing product which proves to be defective in workmanship or materials under normal use for seven
years from the date of purchase. All costs of removal, transportation and reinstallation to obtain warranty service shall be paid by
the consumer. During this “Limited Seven Year Express Warranty,” Fluidmaster Inc. will provide, subject to the “Exclusions” section
set forth below, all replacement parts free of charge, necessary to correct such defects. This “Limited Seven Year Warranty” is null
and void if this plumbing product has not been installed and maintained in accordance with all written instructions accompanying
the product, and if non-Fluidmaster Inc. parts are used in installation.
EXCLUSIONS: FLUIDMASTER INC. SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING COSTS OF
INSTALLATION, WATER DAMAGE, PERSONAL INJURY OR FOR ANY DAMAGES RESULTING FROM ABUSE OR MISUSE OF THE PRODUCT,
FROM OVERTIGHTENING OR FROM FAILURE TO INSTALL OR MAINTAIN THIS PLUMBING PRODUCT IN ACCORDANCE WITH THE WRITTEN
INSTRUCTIONS, INCLUDING USE OF NON-FLUIDMASTER PARTS. DO NOT USE IN-TANK DROP-IN TOILET BOWL CLEANERS CONTAINING
BLEACH OR CHLORINE. USE OF SUCH PRODUCTS WILL RESULT IN DAMAGE TO TANK COMPONENTS AND MAY CAUSE FLOODING AND
PROPERTY DAMAGE. USE OF SUCH PRODUCTS WILL VOID THIS WARRANTY.
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