JKC
Installation & Care Guide

Corsa Type Flush Valve Spindle (27mm)

Follow along and check off each step as you go — most customers finish in about 7 minutes.

~7 minutes
6 simple steps
No power tools
Model JKC-3003
Step 0

Before You Start

Tap each item as you gather it — a couple of minutes of prep now saves a return later.

Tools You'll Need

What's In The Box

Verify before you start: This spindle is 27mm with a Ø7.5mm 20-tooth head, Ø23mm/Ø26mm threaded sections, and a 95mm overall length — designed specifically for Corsa-type wall-mounted flush valves. Compare these measurements to your existing spindle before fitting.
Installation

Step-by-Step Fitting

A straightforward spindle swap — no professional plumber required.

Hands full? Have the steps read out loud instead.
0 of 6 steps complete

Nice work — all steps complete!

Your Corsa-type flush valve should now turn smoothly with no leaks. Keep an eye on it over the next few flushes.

Turn Off the Water Supply
~1 min
Locate the water supply line feeding your Corsa-type flush valve and shut it off completely before doing anything else.
Remove the Operating Handle / Cap Cover
~1 min
Unscrew or unclip the wall-facing handle or cap cover to expose the valve body and the spindle underneath.
Take care: Note how the cover comes off so you can refit it the same way — some covers turn a specific direction.
Unscrew the Old Spindle from the Valve Body
~2 min
Using an adjustable wrench, carefully unscrew the old, worn spindle from the flush valve body and set it aside.
Take care: Old hardware can be stiff — turn steadily rather than forcing it, to avoid damaging the valve body threads.
Insert the New JKC Corsa-Type Spindle
~1 min
Wipe the valve body threads clean, then screw the new JKC 27mm spindle into place by hand until snug.
Take care: Compare the new spindle's dimensions to your old one first — this listing's size chart shows the full measurements.
Refit the Operating Handle / Cap Cover
~1 min
Reattach the handle or cap cover you removed in Step 2, in the same orientation it came off.
Turn On the Water & Test the Full Turn
~1 min
Turn the water supply back on and operate the handle through its full 180° turn a few times, checking for smooth motion and no leaks around the valve body.
Points To Take Care Of

Do's & Don'ts

The most common fitting mistakes — and how to avoid them.

Do

  • Turn off the water supply before starting
  • Compare the new spindle's dimensions to your old one before fitting
  • Hand-tighten the spindle into the valve body
  • Test the full 180° turn before closing everything back up
  • Keep the old spindle until you've confirmed the new one fits and works
  • Wipe the threads clean of old sealant/debris before inserting the new spindle

Don't

  • Don’t Overtighten — this can damage the threads or crack fittings
  • Don’t Force the spindle if it doesn't turn smoothly — recheck alignment first
  • Don’t Skip verifying the 27mm size and thread diameters before fitting
  • Don’t Use metal tools directly on the chrome finish without a cloth wrap
  • Don’t Discard your old spindle until the new one is confirmed working
  • Don’t Leave the water supply on while working on the valve body
Quick Reference

Troubleshooting

If something doesn't feel right after fitting, check here first.

SymptomLikely CauseWhat To Do
Still leaking after fitting the new spindleSpindle not seated fully, or a thread-size mismatchRecheck it’s screwed in fully; confirm dimensions match your valve; contact support if it persists
Handle feels stiff or doesn’t turn a full 180°Old debris/sealant residue in the valve body, or overtighteningClean the valve body threads and refit without overtightening
Spindle won’t fit into the valve bodyWrong size/type for your specific flush valveDouble-check your existing part is Corsa-type, 27mm, before fitting; contact support for help
Water still running after installationSpindle not fully closing, or valve body needs cleaningTurn off the water supply, recheck spindle seating and orientation, contact support if needed

Still need a hand?

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