Currently we have a leak from our worcester greenstar 24i system mkiii boiler. I have identified the bit that is leaking but am unable to decipher what it is from the manual. Can anyone assist by identifying the part in question please? It is a black piece of plastic with a grey screw tap on the top as seen in link below.

[IMG]http://i63.tinypic.com/21exdn5.jpg[/IMG]

Many thanks
James

James, March 2017

Thank you for taking the time to answer that for me, the information has been really useful.

James, March 2017

According to the drawings in the manual (https://www.worcester-bosch.co.uk/support/document/download/release/8716115167/12651) it's the automatic air vent (See page 8, item 27).

Did a quick Google search for

https://www.diynot.com/diy/threads/worcester-bosch-28i-leak-from-auto-air-valve.29644/

https://www.youtube.com/watch?v=FYA9lFT5_cM

http://community.screwfix.com/threads/worcester-24i-combi-problem.73383/

Other results out there for a search for "worcester greenstar 24i leaking air vent"

acp, March 2017