Kohler TOILETS K-3378-EB User Manual

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106423-0290
SIPHON VORTEX LOW
PROFILE ONE-PIECE
TOILETS
INTRODUCTION
This service instruction will help you understand the opera
tion and repair of Kohler low profile onepiece toilets.
The following models are included in these instructions:
K-3378-EB PILLOW TALK K-3383-EB PALARRE
K-3385-EB ROCHELLE K-3397-EB SAN RAPHAEL
K-3402-EB RIALTO K-3408-EB CABERNET
THEORY OF OPERATION
Consider how a low profile, onepiece toilet differs from the
closecoupled toilet. All the water in a close coupled toilet is
held in a tank that is above the rim of the bowl. Water to the
rim and jet is supplied by gravity.
On the other hand, a onepiece toilet holds all the tank
water below the rim of the bowl as shown in Fig. #1.
Fig. #1
When the trip lever is actuated, water enters the supply
valve and flows to the diverter valve. At this point all line
water is diverted to the rim. The tank water is only used to
start the water action in the bowl, and to direct water to the
upleg of the trapway to start the siphonic action as illus
trated in Fig. #2.
Fig. #2
After the flush is completed, the diverter valve directs water
to the rim for bowl refill, and to the tank for tank refill.
Since water which only will be directed to the jet is stored in
the tank, sufficient water to the rim must be supplied by the
supply valve as shown in Fig. #3.
Fig. #3
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Summary of Contents

Page 1 - TOILETS

106423-0290SIPHON VORTEX LOW PROFILE ONE-PIECE TOILETSINTRODUCTIONThis service instruction will help you understand the operation

Page 2

- 10 -the float valve may not be shutting off. Refer to the appropriate chart on the following pages.4. If the water level has dropped below the wate

Page 3

- 11 -Toilet does not shut offand water is flowing intothe flush valve overflow.SYMPTOMS PROBABLE CAUSE CORRECTIVE ACTIONPoor flush. A. Low tank water

Page 4

- 12 -SYMPTOMS PROBABLE CAUSE CORRECTIVE ACTIONTROUBLESHOOTING GUIDE FOR ROCHELLE AND PALARREPoor flush. A. Water pressure is below 25 psi.A. Increase

Page 5

- 2 -K-3385-EB RochelleI.P.S. SUPPLYOF OUTLETFig. #6Fig. #4K-3378-EB Pillow TalkOF OUTLETI.P.S. SUPPLYFig. #7K-3397-EB San RaphaelI.P.S. SUPPLYK-3383-

Page 6 - SEAT (NEW STYLE, K-4653)

- 3 -ROUGHINGIN AND INSTALLATIONCONSIDERATIONSKohler low profile, onepiece toilets are perfect for remodeling and new installations. Refer to the

Page 7 - SEAT (OLD STYLE)

- 4 -HOW TO REPAIR THE RIALTO, SAN RAPHAEL,CABERNET, AND PILLOW TALK FLOAT ANDFLUSH VALVE.INTRODUCTIONThe following instructions are used to replace t

Page 8

- 5 -Old Style Flush Valve Fig. #13Trip ChainFlush BallFlapper HooksMounting HooksScrewscontrols flow at various water pressures. An antisip

Page 9 - PILLOW TALK SEAT REPLACEMENT

- 6 - VOLUME CONTROL. If necessary, you can adjust theflow of water with adjusting screw. Decrease the flow byturning the screw downward or increase

Page 10

- 7 -4. Place seat on toilet, centering the seat/cover bolts inbolt holes as shown in Fig. #17.French Curve Seat InstallationFig. #17BoltWasherNut5. A

Page 11

- 8 -SERVICING THE PALARRE TOILET SEAT1. Insert the seat hinge bolts through the holes in the toiletbowl ledge and secure with two wing nuts as shown

Page 12

- 9 -LUSTRA SEAT REMOVAL1. Refer to Fig. #24. Pry up seat hinge post covers andloosen screws. Remove wing nuts.Lustra Seat RemovalFig. #24Seat Hinge P

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