It wasn't about being cheap!!!
I thought this was an important part of the vent mechanism.
And all the sellers on the Internet didn't mention that this part came with it.
If I had known, all that it did was seal off the water when you removed the AVV, I wouldn't have bothered asking about...
Had a problem with water leaking out of the Air Vent on my Worcester 9.24.
Now I know I can buy a new Air vent here....
but I don't think thats the problem!!
There's this "Valve spring thing" that connects to the bottom of the air vent...........
But I can't seem to find out what...