Instructions / Assembly
– Please keep a copy of these instructions on the property in which the product was installed.
d
Replacing Valve Cap
Connect cap to rod (a). If you have 
a 400 with a metal rod (c), place 
adapter (b) into slot at end of cap. 
Place cap on valve with rod next to 
refill tube (d). Push down and twist 
clockwise until it stops.
If Replacing Seal: 
Use only a genuine 
Fluidmaster 242 seal.
SEAL
LOCATION
If Replacing 
Seal
Flushing Out Debris
Hold cup upside down over 
uncapped valve to prevent 
splashing. Turn water supply 
on and off a few times. Turn 
water supply off when putting 
cap back on valve.
Removing Valve Cap Assembly
Turn off water supply 
& flush out tank. Push 
float up with right hand 
(see picture). Grip and 
hold shaft under float 
with right hand. With left 
hand, twist cap and lever 
counter clockwise 1/8th 
of a turn to unlock the top 
cap. Pressing down on top 
may be helpful with older 
valves. Let cap assembly 
hang on float cup.
Removing Valve Cap, Flushing Out Debris, Replacing Seal & Replacing Valve Cap
a
c
b
IF FILL VALVE TURNS ON AND OFF BY ITSELF
•  This indicates the tank is losing water. The fill valve is refilling lost water. 
Clean flapper and drain seat. If leak continues change flush valve. Install 
Fluidmaster 507AKR, 540AKR or 555C kit.
IF WATER LEVEL IN BOWL IS TOO LOW
•  Make sure the refill tube is supplying water down overflow pipe.
•  Water level in tank may be too low. Raise water level to 1/2” below top 
of overflow pipe (See Step “7”). You may have to lengthen the fill valve 
in order to increase the water level in tank (See Step “3”).
•  Flapper may be closing too soon. Give flapper chain approximately 1/2” 
of slack (See Step “5”).
IF FILL VALVE DOES NOT TURN ON, WILL NOT 
TURN OFF, OR WILL NOT REFILL THE TANK 
AFTER THE FLUSH
•  Remove top cap and check for debris. If you find debris, or flow 
is weak: Inspect lower section of fill valve for partial blockage. 
Partial blockage may be at shut off valve or in water supply line 
(See “REMOVING THE VALVE CAP ASSEMBLY & FLUSHING OUT 
DEBRIS”).
•  If fill valve has been in use for some time and/or float cup does not 
drop when flushing tank, replace seal with a genuine Fluidmaster 242 
seal (See “IF REPLACING SEAL”).
TROUBLESHOOTING
B
D
A
OVERFLOW
PIPE 
FILL 
VALVE 
C
WATER 
LEVEL 
9
Once fill valve is installed, ensure overflow 
pipe and water level of tank are correctly set.
1. THE TOP OF OVERFLOW PIPE (A) must be 
minimum of 1" below TANK LEVER HOLE (B).
2. WATER LEVEL (C) is set below top of Overflow 
Pipe (Fluidmaster recommends 1/2”).
3. THE CRITICAL LEVEL MARK / C.L. Mark (D) 
identified by C.L. on fill valve must be positioned 1” 
above top of overflow pipe. This is a requirement of 
the Universal Plumbing Code.
Code Compliance helps protect your home & 
drinking water supply.
Code Compliance
4
2
0
6
8
Hose
Clamps
8
HINT: Flush toilet – if bowl appears full, but continues to fill, valve 
may be overfilling bowl. Adjust water level as follows:
A. Fill bowl with gallon of water & wait for it to recede and stop.
B. Mark water level with pencil and flush toilet. If the water refills 
above line, water level is too high, if water stops filling below pencil 
line, water is too low.
C.Adjust water by pushing down and rolling the dial with thumb on 
roller clamp. “0” means no refill.
Water-Saving Feature: Roller Clamp
7
HINT: When adjusting float cup, flush tank and 
make adjustment while tank is filling.
A. Turn water on.
B. Turn water level adjustment screw to set 
float cup to desired level.
C. Turning adjustment screw clockwise raises 
water level.
D. Turning adjustment screw counter 
clockwise lowers water level.
E. Flush toilet to check new level.
HINT: Twisting adjustment screw 8 times 
moves float by 1/2”.
Adjusting Tank Water Level
B
A
6
A. Attach water supply coupling nut to 
fill valve – Turn clockwise by hand until tight.
WARNING: Over tightening the nut could damage 
fill valve or coupling nut resulting in flooding 
and property damage. Fluidmaster Click Seal
®
Connector is recommended: a perfect seal every 
time without over tightening.
B. To check for leaks, turn on water supply.
C. If leaking occurs – turn coupling nut just 
enough to stop leaking.
D. Flush toilet to check.
NOTE: We recommend replacing the existing 
water supply connector if it is worn or over 5 
years old – this will protect your home from 
potential flooding and property damage.
Attach Water Supply Connector
HORIZONTAL 
POSTS
SEAT
FLAPPER CLIPS
5
A. Put flapper on seat.
B. Align flapper clips with horizontal 
posts of overflow pipe.
C. Push down on clips to connect.
D. Attach chain clip to tank lever – Leave 
about 1/2” of slack in chain.
E. Turn rubber portion of flapper left or 
right to adjust performance level.
F. Clockwise for greater flush volume.
G. Counterclockwise for lower flush 
volume.
Installing New PerforMAX™ High
Performance Flapper
1
2
3
4
5
6
7
8
9
M
A
X
M
I
N
a
b
NIPPLE
Correct set up of refill 
tube and refill clip to 
overflow pipe
4
A. Place fill valve in tank.
B. Align fill valve nipple to face overflow pipe.
C. Press down on shank from inside while tightening 
locknut.
D. Hand-tighten only – DO NOT OVERTIGHTEN! 
Overtightening may crack fill valve or tank causing 
flooding.
E. Attach one end of refill tube (b) to refill clip (a).
F. Place clip on right side of overflow pipe.
G. Attach other end of tube to nipple on fill valve – Cut 
tube as necessary.
H. Squeeze tube clamps and slide to ends of tube and 
release.
WARNING: Placing refill tube down overflow pipe may 
cause significant water waste.
Installing New Fill Valve
INSTALLATION
E
Shank
Washer
Threaded
Shank
Place Shank 
washer onto 
threaded 
shank of fill 
valve. Flat 
side up.
3
Fill Valve Parts
A)  Refill Clip
B)  Refill Tube
C) Shank Washer
D) Locknut
E) Threaded Shank
F) Roller Clamp
G) Hose Clamps
Preparing the Fill Valve for Installation
D
C
A
B
F
G
DO NOT
MOVE
LOCK RING!
Fill Valve Positioning:
A. Position fill valve in tank – DO NOT FULLY 
INSTALL.
B. Set top of fill valve 3” above overflow pipe.
Fill Valve Height Adjustment – If Necessary:
A. DO NOT MOVE LOCK RING.
B. Increase height – twist lower shank counter 
clockwise.
C. Decrease height – twist lower shank clockwise.
D. Critical Level Mark (C.L Mark) MUST be 
positioned 1” above top of overflow pipe – 
required by Universal Plumbing Code.
“C. L”
MARK
MEASURE
HEIGHT ONLY:
DO NOT INSTALL
LOCK
RING
”
1
2
Remove tank lid. Use pencil to mark water level of 
tank. Then follow steps A-E.
A. Turn off water supply (Clockwise). Flush toilet and remove 
excess water from tank with sponge.
B. Disconnect water supply connector. Remove locknut from 
under tank.
C. Remove fill valve from tank.
D. Unhook flapper chain from tank lever.
E. Remove flapper from overflow pipe on flush valve.
Remove Old Fill Valve & Flapper
A
B
C
ED
PREPARATION
Before you begin, watch 
our installation video:
http://opn.to/a/PV6p9
SCAN HERE!
1
PARTS
IN THIS KIT:
(1) PerforMAX™ Fill Valve 
(1) Shank Washer
(1) Locknut
(1) Refill Tube
(1) Refill Clip
(1) Roller Clamp
(2) Hose Clamps
(1) PerforMAX™ High 
Performance Flapper
REFILL TUBE
ROLLER CLAMP
HOSE CLAMP
FLUSH
VALVE
OVERFLOW
PIPE
TANK
LEVER
FLAPPER
FLOAT
CUP
LOCK RING
FILL
VALVE
REFILL CLIP
TANK SHOULD 
LOOK LIKE THIS 
WHEN SET UP IS 
COMPLETE
SHANK
WASHER
LOCKNUT
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.
DON’T
USE
TOOLS
NEEDED
Scissors Sponge
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.
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.
 WARNING
FLUIDMASTER
®
 402CARHR 
FILL VALVE & FLAPPER
INSTALLATION INSTRUCTIONS
PART# 4-2448, Grev. 3, 03/17
242
SEAL

