Lamona Orta Tap4131 Valve. The  Lamona Orta comes as a ceramic disc valve and a compression valve version.  Here, this valve is the ceramic disc , quarter turn valve.  If your own Lamona Orta tap has a compression valve, this is NOT the valve to buy. Contact us if your Tap has a compression (twist turn) valve, 
If your Tap is dripping from the Spout then you might need to change your Valves.  Here is our Guide 7 Easy Steps to replace Kitchen Tap Valve.

If your Tap is dripping where the Spout meets the Base you might need to replace your  O Ring Kit.

Measurements 

Height 50mm / Diameter at thread 21mm / Splines 20 / Nut Height 8mm

Here is the link to all our Howdens Lamona Orta Tap4131/2 Parts.