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Wellworth Toilet Repair Parts
By Kohler

Whether you need a top assembly or a tank to bowl kit, replacement parts for your Wellworth 4500 series toilet are right here at PlumbingSupply.com®! These and many other parts are here to help keep your classic toilet working at it's best. Looking for more Kohler toilet parts? Click here.

Wellworth toilet

Kohler Toilet Replacement Parts - Wellworth Series Toilets
Model #'s K4512, K4512-EU, K4512-PU, K4512-X, K4512-XE, K4512-XR, K4512-XU

Wellworth repair parts by Kohler

Item Part # Description Price & Quantity
#1 1059500 Fill Valve - replaced by *GP1138930 - Includes color coded flow restrictors $21.95
#2 1057940 Top Assembly - fits fill valves 1059500 and GP1138930 $5.24
#3 83991 Flush Valve - replaced by 1003068 flush valve kit
- Includes tank gasket (51487) -   bolt kit sold separately below (#10)
$21.13
#4 1006958 Flapper - replaced by GP85160 $9.95
#5 53154 Rubber Washer - replaced by GP1145626 $3.34
#6 51487 Tank To Bowl Gasket With 30419 Bolt Kit
Includes gasket (1), washers (3), 5/16" bolts (3) and nuts (3)
$12.85
#7 83451 Top Assembly fits old style fill valve 75422 - replaced by Fluidmaster #350 $4.99
#8 1013092 Bolt Caps (2) - White - Click here for more color options $5.39
#9 51261 Refill Tube Clip $2.79
#10 30419 Tank To Bowl BOLT KIT - Includes: #'s 11, 12 & 13 $9.67
#11, #12, and #13 not available separately - please order #10 tank to bowl bolt kit above
#14 50752 Friction Ring For Flush Valve $1.33
#15 50751 Lock Nut $3.97
GP1083167 *Replacement Class 5 Fill Valve $19.91

*If your existing fill valve stem is GRAY with a small insert, use GP1138930.
If your existing fill valve stem is BLACK with a large insert, use GP1083167.
View this fill valve comparison to help you choose

- OR - View Cart

Not sure which model toilet you have? Try looking under the toilet tank lid or inside of the toilet tank.


Kohler Toilet Replacement Parts
The Wellworth Series - Model #'s K4512-JA, K4512-K, K4512-KU, K4512-U

Wellworth repair parts by Kohler

Item Part # Description Price & Quantity
#1 84150 Fill Valve - replaced by *GP1138930 - Includes color coded flow restrictors $21.95
#2 83451 Top Assembly - fits old style fill valve 84150 - replaced by Fluidmaster #350 $4.99
1057940 Top Assembly - fits new style fill valve GP1138930 $5.24
#3 84355 Float Discontinued
#4 84143 Flapper - replaced by "will fit" $6.38
GKF01 Gasket only - fits replacement "will fit" flapper ONLY (shown above) $4.30
#5 84144 Flush Valve - Replaced by "will fit" 84144 - Includes flapper (84143), rubber washer (53154), tank & nut (50751) - replacement gasket (51487) sold separately below $8.95
#6 53154 Rubber Washer - replaced by GP1145626 $3.34
#7 51487 Tank To Bowl Gasket With 30419 Bolt Kit
Includes gasket (1), washers (3), 5/16" bolts (3) and nuts (3)
$12.85
#8 52048 Bolt Cap - White - Click here for more color options $5.39
#9 51261 Refill Tube Clip $2.79
#10 30419 Tank to Bowl BOLT KIT - Includes: #'s 11, 12 & 13 $9.67
#11, #12, and #13 not available separately - please order #10 tank to bowl bolt kit above
#14 50752 Friction Ring For Flush Valve $1.33
#15 50751 Lock Nut $3.97
GP1083167 *Replacement Class 5 Fill Valve $19.91

*If your existing fill valve stem is GRAY with a small insert, use GP1138930.
If your existing fill valve stem is BLACK with a large insert, use GP1083167.
View this fill valve comparison to help you choose

- OR - View Cart

Kohler Toilet Replacement Parts
The Wellworth Series - Model #'s K4512-T, K4512-UT

Wellworth repair parts by Kohler

Item Part # Description Price & Quantity
#1 75422 Fill Valve - replaced by *GP1138930 - Includes color coded flow restrictors $21.95
#2 83451 Top Assembly - fits old style fill valve 75422 - replaced by Fluidmaster #350 $4.99
1057940 Top Assembly - fits new style fill valve GP1138930 $5.24
#3 83991 Flush Valve - replaced by 1003068 flush valve kit
- Includes tank gasket (51487) - gasket bolt kit sold separately below (#6)
$21.13
#4 81217 Flapper - replaced by GP85160 $9.95
#5 53154 Rubber Washer - replaced by GP1145626 $3.34
#6 51487 Tank To Bowl Gasket With 30419 Bolt Kit
Includes gasket (1), 5/16" washers (3), bolts (3) and nuts (3)
$12.85
#7 52048 Bolt Cap - White - Click here for more color options $5.39
#8 51261 Refill Tube Clip $2.79
#9 30419 Tank to Bowl BOLT KIT - Includes: #'s 10, 11 & 12 $9.67
#10, #11, and #12 not available separately - please order #10 tank to bowl bolt kit above
#13 50752 Friction Ring For Flush Valve $1.33
#14 50751 Lock Nut $3.97
GP1083167 *Replacement Class 5 Fill Valve $19.91

*If your existing fill valve stem is GRAY with a small insert, use GP1138930.
If your existing fill valve stem is BLACK with a large insert, use GP1083167.
View this fill valve comparison to help you choose

- OR - View Cart

Not sure which model toilet you have? Try looking under the toilet tank lid or inside of the toilet tank.


Kohler Toilet Replacement Parts - Wellworth Series Toilets
Model #'s K4519, K4519-CE, K4519-CJ, K4519-CM, K4519-CR, K4519-CU, K4519-CV, K4519-CW, K4519-CY, K4519-JA, K4519-JB, K4519-TR

kohler toilet repair parts - k4519

Item Part # Description Price & Quantity
#1 1041244 Fill Valve - replaced by *GP1138930 - Includes color coded flow restrictors $21.95
#2 30373 Cap Assembly for Old 30653 - replaced by 495-0188-00
Includes Plunger Assembly #30197
$12.59
#3 30197 Plunger Assembly $7.25
#4 1001906 Flush Valve Assembly - replaced by 85406
- Includes tank gasket (51487) - gasket bolt kit sold separately below (#10)
$24.79
#5 87449 Flapper - replaced by GP87449 - fits replacement valve 85406 only $7.89
#6 53154 Rubber Washer - replaced by GP1145626 $3.34
#7 51487 Tank To Bowl Gasket With 30419 Bolt Kit
Includes gasket (1), washers (3), 5/16" bolts (3) and nuts (3)
$12.85
#8 52048 Bolt Caps (2) - White $5.39
#9 51261 Refill Tube Clip $2.79
#10 30419 Tank to Bowl BOLT KIT - Includes: #'s 11, 12, & 13 $9.67
#11 51624 Brass Bolt - sold only in 30419 kit - see item 10 --
#12 32572 Washer - sold only in 30419 kit - see item 10 --
#13 51533 Brass Nut - sold only in 30419 kit - see item 10 --
#14 83451 Top Assembly - fits fill valve 1041244 - replaced by Fluidmaster #350 $4.99
385 Top Assembly for fill valve GP1138930 $4.98
#15 50752 Friction Ring For Flush Valve $1.33
#16 50751 Lock Nut $3.97
  30324-CP Left Hand Trip Lever - Chrome $14.23
  30324-VF Left Hand Trip Lever - Polished Brass $41.19
  30324-BN Left Hand Trip Lever - Brushed Nickel $59.51
GP1083167 *Replacement Class 5 Fill Valve $19.91

*If your existing fill valve stem is GRAY with a small insert, use GP1138930.
If your existing fill valve stem is BLACK with a large insert, use GP1083167.
View this fill valve comparison to help you choose

- OR - View Cart

Kohler Toilet Replacement Parts - Wellworth Series Toilets
Model # K4520

kohler toilet repair parts - k4520

Item Part # Description Price & Quantity
#1 30672 Complete Fill Valve Assembly - view dimensions $74.25
#2 30452 Cap Assembly Kit $19.83
#3 51748 Plunger Assembly $5.00
#4 53154 Rubber Washer - replaced by GP1145626 $3.34
#5 51531 Washer/Tank Gasket $7.19
#6 50752 Washer $1.33
#7 50751 Nut $3.97
#8 52048 Bolt Caps (2) - White - Click here for more color options $5.39
#9 GP52050 Tank To Bowl Accessory Pack
Includes 3ea - #'s 13, 14, 16, 17 and 6ea - #15
$9.98
#10 50130 Flapper - Replaced by "Will Fit" flapper $7.51
#11 30680 Flush Valve Assembly - Replaced by 10" tall "Will-Fit"
- will need to be cut down to original valve height
- can use any type of saw (wood saw, hack saw, etc.)
- Please note: altered valves are non-returnable.
$8.31

- OR - View Cart

Not sure which model toilet you have? Try looking under the toilet tank lid or inside of the toilet tank.



Frequently Asked Questions

Q. "The GP1138930 comes with some colored inserts. What are those for?"
A.Since the Kohler GP1138930 is a replacement for a variety of fill valves, it comes with a selection of color coded flow restrictors. To select the correct insert, check your old fill valve (the one you're replacing) and use the same color restrictor on your new GP1138930 fill valve. See example of the four included restrictors.

Have questions about toilet parts or toilet repair?

Toilet Repair Information & FAQs



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