Rapid response! Thanks
Does it bolt onto the circle which is on the fuel rail? as i have a hole which looks like it leads to a filter?
Ignore that, its usually where the regulator sits (on a Ph1 engine, you can probably see the silver regulator in my picture). On a 172 Ph2/182 it isn't used as there is only a single feed to the fuel rail, there is no return to the pump.