Genuine San Marco Boston Tap Valve for the Cold Water side or Hot Water side of your Kitchen Tap.  No bush is used with this valve in this Tap.  To remove the handle please see our ‘7 easy steps’.  With this particular tap you have to undo the indicator first.  There is no grub screw.

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 Boston Tap O Ring Kit 1239R
Here is the link to all our  Boston Kitchen Tap Spare Parts.

Brass Valve with ceramic discs :20/8 with thread.

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