Fluidmaster K-400H-038 3 Inch Toilet Tank Repair Kit Installation Guide

: June 5, 2024
: FLUIDMASTER

FluidMaster

Fluidmaster K-400H-038 3 Inch Toilet Tank Repair Kit

Fluidmaster-K-3-Inch-Toilet-Tank-Repair-Kit

PARTS OVERVIEW

Fluidmaster-K-3-Inch-Toilet-Tank-Repair-
Kit-1

STEP 1: PREPARE TANK

SEE INSTRUCTION VIDEO ON WEBSITE FOR REFERENCE.

A: TURN OFF WATER
B: DRAIN WATER
Flush toilet to drain most of the water from tank.

STEP 2: REMOVE OLD PARTS

A: REMOVE CONNECTOR
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
Use green tool to twist locknut below tank to remove locknut from fill valve.
C: REMOVE OLD FILL VALVE
Including refill tube, refill clip and shank washer. Drain any excess water into the back panel of empty packaging by removing fill valve from tank. (Pull fill valve up)
D: DISCONNECT FLAPPER CHAIN
E: REMOVE TANK FROM BOWL
Use green tool to unscrew nuts from under the bowl and remove bolts from tank.
NOTE: Bolts can be loosened from inside tank.
F: LAY TANK ON ITS SIDE
Place on a safe and secure surface.
G: REMOVE GASKET
Remove tank-to-bowl gasket from below the tank.
H: REMOVE FLUSH VALVE LOCKNUT
Using red wrench, twist locknut to remove. Remove old flush valve from tank.

STEP 3: INSTALL FLUSH VALVE

A: INSERT FLUSH VALVE INTO TANK HOLE
Position overflow pipe toward back of tank. NOTE: Do not cover tank bolt holes with flush valve. If flush valve covers a bolt hole, turn flush valve slightly to the right (overflow tube to the right) to clear the bolt hole. In some cases, placing bolts in the holes first may be necessary.

STEP 3: INSTALL FLUSH VALVE (CONTINUED)

B: USE RULER ON THE RED WRENCH TO MEASURE AND ADJUST NEW FLUSH VALVE
Mark the flush valve 1” below bottom of tank lever hole.
NOTE: The top of the overflow pipe must be at minimum of 1” below the tank lever hole.
C: ADJUST FLUSH VALVE HEIGHT
Twist to unlock, pull or push to correct height, twist to lock in place.

STEP 4: INSTALL TANK-TO-BOWL GASKET

A: INSTALL LOCKNUT
Holding flush valve in place, screw locknut onto bottom of flush valve and hand-tighten to secure. Use red wrench to go ½ turn beyond hand-tight.
Do not overtighten.
B: Apply red tank-to-bowl gasket to bottom of flush valve locknut, fully covering locknut.

STEP 5: SECURE TANK TO BOWL

A: INSTALL RUBBER WASHERS
Place one rubber washer on each tank bolt.
B: INSERT BOLTS INTO TANK
Place tank bolts through bottom holes of tank.
C: SECURE TANK ONTO BOWL
Set tank onto bowl. Place metal washer and large hex nut on each bolt under toilet bowl. Using green tool, tighten hex nuts evenly until tank is snug and does not rock. Do not overtighten.

STEP 6: ADJUST FLAPPER

A: REMOVE FLAPPER
Remove flapper from flush valve by pulling the frame of the flapper up one side at a time.
B: ADJUST FOR MOST EFFICIENT FLUSH
Adjust from 0 to 10 to find the perfect flush for your setup.
Note: Flapper dial is pre-set to maximum setting (10). If toilet model not listed, keep flapper at default setting 10.
Hint: The higher the number, the longer the flapper stays open for more water flushed.

STEP 7: 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.

STEP 8: INSTALL NEW FILL VALVE

A: PUSH REFILL TUBE ONTO REFILL PORT
B: ATTACH REFILL CLIP TO OTHER END OF REFILL TUBE
C: INSERT FILL VALVE
Position refill tube to face flush valve making sure fill valve parts do not interfere with lever arm.
D: INSTALL LOCKNUT
Using green tool, screw locknut onto fill valve shank (below tank). Tighten 1/4” beyond hand-tight. Do Not Overtighten*.
E: ATTACH REFILL CLIP TO OVERFLOW PIPE
Note: If refill tube is too long to fit inside tank with lid closed, remove refill tube from fill valve refill port, cut tube and reattach to port.

STEP 9: FINISHING STEPS

A: CONNECT FLAPPER CHAIN
Attach clip to the tank lever directly above the flapper. Leave roughly ½” of slack (small ‘J’ shape) in the chain.
B: ATTACH WATER SUPPLY CONNECTOR TO FILL VALVE
*Hand-tighten only. Do not overtighten.
C: TURN ON WATER Check for leaks.
D: WATER LEVEL
After the tank stops filling, water level should fill the tank to roughly ½” below top of overflow pipe to ensure a proper flush. (Does not need to be exact.)

STEP 10: 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.
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 11: FINE-TUNE FLUSH

A: TEST FLUSH
Drop 3 squares of toilet paper in bowl then flush.
B: ADJUST FOR MOST EFFICIENT FLUSH
Continue to adjust dial down one setting and flush until toilet is unable to flush paper properly.
Note: Turn off water. Remove flapper for easy adjustment (see Step 6).
C: FINAL SETTING
Once unable to flush, adjust dial up one for final setting.

STEP 12: FINE-TUNE BOWL WATER LEVEL

A: FILL BOWL WITH A GALLON OF WATER
Wait 1 minute until the bowl water level recedes down and stops.
B: MARK THE WATER LEVEL IN THE BOWL
With a pencil, draw a line at the top of the water level in bowl. (Pencil mark will easily wash off).
FLUSH TOILET TO CHECK BOWL WATER LEVEL
If the water level matches the line you’ve made in the bowl when the fill valve stops filling the tank, the water level is correct, proceed to Step 13.
If the water level matches the line in the bowl and the fill valve is STILL FILLING, then the bowl water is TOO HIGH, proceed to Step 12D.
If the valve shuts off and the water level does NOT match the line in the bowl, the water level is TOO LOW, proceed to Step 12D.
ADJUST THE BOWL WATER LEVEL
E: FLUSH TOILET, CHECK BOWL WATER LEVEL
Repeat Steps 12D and 12E until water level in bowl matches the line when the fill valve shuts off.

STEP 13: FLUSH THE TOILET

A: FLUSH THE TOILET
If you’re satisfied with the flush, YOU’RE DONE!
Is 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

Turn off water supply, then flush toilet.
With right hand push float up, grip and hold shaft under float.
With left hand twist cap and lever arm counterclockwise to unlock cap. Let cap hang on float cup.
Hold empty cup upside down over un-capped valve to prevent splashing.
Turn water supply on and off a few times, then leave it turned off.
Replace valve cap.
- 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.
  See Our Troubleshooting HOW-TO VIDEO http://bit.ly/2yAdZn7

REPLACE FILL VALVE SEAL

A: Remove cap (see above).
B: Replace seal with a *genuine Fluidmaster 242 Seal.
C: Replace valve cap.
- 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.

WATER LEVEL IN BOWL IS TOO LOW

A: WATER FROM REFILL TUBE MUST FLOW THROUGH OVERFLOW PIPE
Make sure the refill tube is supplying water down overflow pipe. (Metal side out for refill clip)
B: WATER LEVEL IN TANK MAY BE TOO LOW
1/2” below top of overflow pipe is recommended (see page 15).
C: FLAPPER MAY BE CLOSING TOO SOON
Give flapper chain approximately 1/2″ of slack (small “j” shape).
D: FILL VALVE DIAL MAY NEED TO BE ADJUSTED

MY FLAPPER STAYS OPEN TOO LONG & I GET A DOUBLE-FLUSH

A: ADJUST THE FLAPPER SETTING TO A LOWER NUMBER

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 ser-vice shall be paid by the consumer. During this “Limited Seven Year Express Warranty,” Fluidmaster Inc. will provide, subject to the “Exclu-sions” 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 INSTRUC-TIONS, 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.

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.
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