Installation & Care Guide — JKC Plumber Type Flush Valve Spindle 28mm (JKC-1104)

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

Adjustable wrench or spanner
Clean cloth/rag (to catch residual water)

What's In The Box

1 x JKC Plumber Type Flush Valve Spindle (28mm)

Verify before you start: This spindle is sized for 28mm plumber-type flush valves (Ø25mm upper thread / Ø27mm lower thread, 92mm total length, 30-tooth Ø9.5mm spline grip). Compare these measurements to your existing spindle before fitting.

Installation

Step-by-Step Fitting

Work through each step in order, and check it off as you go.

Hands full? Have the steps read out loud instead.

0 of 6 steps complete

Nice work — all steps complete!

Your flush valve spindle replacement is done. Turn the handle through a couple of full cycles to confirm smooth, leak-free operation.

Turn Off the Water Supply

~1 min

Locate the water supply to the flush valve and turn it off fully before you begin.

Take care: Skipping this step is the most common cause of a messy, avoidable spill.

Remove the Valve Handle

~1 min

Unscrew or pull off the valve handle/knob to expose the old spindle underneath.

Unscrew the Old Spindle

~2 min

Using an adjustable wrench, unscrew the old spindle from the valve body and set it aside.

Take care: If it feels stiff, don't force it — a few gentle back-and-forth turns usually loosens old threading.

Fit the New JKC Spindle

~2 min

Hand-thread the new JKC spindle (28mm) into the valve body, then snug it with the wrench.

Take care: Turn the spindle fully clockwise to seat the rubber washer correctly before reattaching the handle.

Reattach the Handle

~1 min

Fit the handle back onto the spline grip and secure it the same way it came off.

Turn the Water Supply Back On & Test the Flush

~1 min

Turn the water supply back on, operate the handle through a full 180° turn, and check for smooth motion with no drips or leaks at the base.

Points To Take Care Of

Do's & Don'ts

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

Do

Compare the spindle's dimensions (28mm, Ø25mm/Ø27mm threads) to your old part before fitting
Turn the water supply off fully before starting
Hand-tighten the spindle first, then snug with a wrench
Turn the spindle fully clockwise to seat the rubber washer before reattaching the handle
Keep the old spindle until you've confirmed the new one seats and seals correctly
Test for smooth 180° turning and no leaks before regular use

Don't

Overtighten the spindle — this can damage the threading or crack the valve body
Force the spindle if it doesn't thread in smoothly — recheck alignment first
Skip turning off the water supply
Reuse a damaged or worn rubber washer
Discard the old spindle until the new one is confirmed working
Use metal-toothed pliers directly on the brass finish — they can scratch it

Quick Reference

Troubleshooting

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

Symptom	Likely Cause	What To Do
Valve still drips after replacement	Spindle not fully seated, or rubber washer misaligned	Unscrew, check washer alignment, and reseat the spindle fully clockwise
Handle feels stiff or hard to turn	Spindle overtightened or dry threading	Loosen slightly and check for smooth 180° rotation
Spindle won't thread in at all	Wrong thread size for your valve body	Double-check your old part's dimensions against the 28mm spec before ordering
Water still runs continuously	Rubber washer worn, or valve seat damaged	Contact support with your order details for further guidance

JKC

Still need a hand?

Message our support team with your order details and we'll help you sort it out.

+91 97269 54303

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