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Fits all known domestic valves up to 15mm (½")

Supplied in two forms

  • Part No. DOMPK1 This is usually supplied in quantites of 200 and above to resellers and repackagers.
  • Part No. DOMPK2 This is supplied in quantities from 6, the minimum order, to as many as required.


This form has all of the like components packaged together.

  • i.e. If you order 200 DOMPK1's you will get
  • a package containing 400 Tops,
  • a package containing 400 Collars,
  • a package containing 200 Drive Disk 1's
  • a package containing 200 Drive Disk 2's
  • a package containing 200 Drive Disk 3's
  • a package containing 200 Drive Disk 4's
  • a package containing 200 retaining clips


This form has all of the components to service one radiator packaged together.

  • i.e. If you order 20 DOMPK2's you will get pre bagged parts
  • each bag will contain
  • 2 - Tops,
  • 2 - Collars,
  • 1 - Drive Disk 1
  • 1 - Drive Disk 2
  • 1 - Drive Disk 3
  • 1 - Drive Disk 4
  • 1 - Retaining clip

each bag is printed with fitting instructions.

General fitting, further details are below


Select drive disk that matches the valve spindle. (File spindle if necessary).

Place disk inside cap and push fully home on to drive pegs. If using Disk No 4, fit only as shown in detail 4.

If required, use extension collar to obtain snug fit.

Position cap over spindle and rotate until disk engages.

Gently tap the top of the cap down until firmly seated.


Fit as above but do not fit a drive disk.

General information

Wheelhead valves are for manual control of radiators' (on/off) and are fixed on the 'flow' pipework.

Lockshield valves are for regulating the amount of water that passes through the radiator and are fixed on the 'return' pipework. They are Not required for manual control and should be left in pre-set position.

Identifying the wheelhead and lockshield valves if both tops are missing from a radiator and your heating system is on, turn it off (at your control switch) and leave until radiator/pipework is COLD. Then turn the heating system back on and whichever pipework (leading directly to the valve) is the first to get hot is the Wheelhead valve.

Optional accessories collar, for use with valve measurements up to 22mm. 4 Drive Discs, for wheelhead valves ONLY. One disc MUST be used.

Top removal, as the valve tops are tamperproof, use a pin hammer to tap off the top. Replace with a new top.

IMPORTANT do not fit replacement tops on leaking valves.

Fitting information please read carefully before attempting the fitting of tops

Wheelhead for a measurement of 21mm and under, use the collar with the 'lip' at the bottom. For 22mm use the collar with the 'lip' at the top. For 23mm discard the collar. For measurements over 23mm a commercial top is required.

N.B. for valves with tall bodies, leave collar slightly visible for better coverage.

Lockshield if using collar, push collar into the top. Push top down onto spindles and lightly tap with a pin hammer until firmly down.

Fit Drive Disk No.4 and retaining clip this way in

  1. Select ONE of the four drive discs in the pack. Choose the shape that corresponds best to the exposed valve spindle. (If necessary, carefully file the valve spindle).
  2. Place drive disc inside top and position over the locating pegs. Push fully in. when using drive disk No. 4 secure in place with the retaining clip.
  3. If using the collar, push collar into the top.
  4. Position top over spindle and rotate until the drive disc engages, a slight tension should be felt as the disc grips the spindle for turning.
  5. Lightly tap the top with a small pin hammer unit firmly down.

Should you encounter any problems please don't hesitate to contact us.