Hello,
I've got a very noisy boiler. Before I can afford to replace it, I'm trying to put some stuff in it that might make it less noisy.
The instructions include removing the vent valve to pump the chemical into a radiator. The picture shows the valve with a square bit in the middle and a hexaginal bit around that which I thought I'd put a spanner or socket on. But my vent valve doesn't have one. Do I need a tool for that central square bit or something?
There's a picture from the instructions here -
Thanks for any help.
Peter