*Clearance Sale* Avocet / WMS Offset Window Espag Lock – 22mm / 25mm Backset

///*Clearance Sale* Avocet / WMS Offset Window Espag Lock – 22mm / 25mm Backset

*Clearance Sale* Avocet / WMS Offset Window Espag Lock – 22mm / 25mm Backset

10.0013.00 inc. VAT

*Clearance Sale*


Avocet offset window espag locks, used on old uPVC windows. Also sometimes called WMS offset window espag lock.

Backset: 22mm & 25mm
Lengths available in 22mm backset: 600mm, 800mm

Lengths available in 25mm backset: 250mm, 400mm, 600mm, 800mm, 1000mm

No screws come supplied with this product. Click here to see our selection of screws

Click here to watch our video on how correctly measure a window espag lock



*Clearance Sale*


The espag is the window locking mechanism, which is operated by the window handle. Offset window espag locks are commonly found on old uPVC windows. The gear box (the section the window handle connects to) is offset to one side. This was to accommodate the uPVC window profiles that were being manufactured at the time. The available space inside the profile for a window espag lock was very small. Modern uPVC window profiles are bigger and space is not an issue as it once was. Nearly all modern uPVC windows use inline window espag locks. As a result of the switch to using inline window espag locks, offset window espag locks now are a thing of the past. Many window hardware manufacturers have stopped making offset window espag locks.

Note: Please check sizes carefully against the sizes you  require


Unlike some other window espag locks, the avocet window espag lock has no size markings on the faceplate. You will have to check the overall length of the window lock.

You will also have to check the backset. Get a measuring tape and measure from the edge of the faceplate to the centre of the handle. There are two sizes available – 22mm & 25mm. Alternatively, you can remove the lock from the window. On Avocet offset window espag locks the backset size will be stamped on to the gearbox of the window lock.

We have the following lengths available in 22mm backset:

  • 600mm – 2 roller cams
  • 800mm – 2 roller cams

We have the following lengths available in 25mm backset:

  • 250mm – 2 roller cams
  • 400mm – 2 roller cams
  • 600mm – 2 roller cams
  • 800mm – 2 roller cams
  • 1000mm – 3 roller cams

The last size to check is the width of the lock. The width of the Avocet offset window espag locks we stock are 16mm wide. This is an important size to check as there are slimline versions that measure 14mm wide. These slimline versions are not being manufactured anymore.

Please contact us if you are unsure of the size window lock you require.

See pictures for full dimensions. See video for more information.

Additional information

Weight 1 kg
Espag Length

1000mm, 250mm, 400mm, 600mm, 800mm


22mm, 25mm

Fitting Instructions

1. Use the sizing guide above to choose the correct size window lock
2. Remove the two fixing screws holding the handle, and remove the handle
3. Remove the fixing screws on the faceplate of the lock
4. Fit the new lock into place
5. Fit the window handle back through the new lock, making sure it is closing in the same direction as before; and it is in the correct position in relation to the lock position
6. Re-fit the handle fixing screws
7. Re-fit the fixing screw to the faceplate of the lock.
8. Remove the screw/screws from the frame keeps. Move the keeps to suit the position of the roller locks. Refit the screw/screws into the frame keeps.
9. Test the operation of the lock


There are no reviews yet.

Be the first to review “*Clearance Sale* Avocet / WMS Offset Window Espag Lock – 22mm / 25mm Backset”

Your email address will not be published. Required fields are marked *


I agree

You may also like…

All orders placed after 12pm on Friday 22nd of March will not be dispatched until Monday 25th of March. Dismiss