Hammering sounds are usually caused by a slug of water trapped in the
pipes being slammed around by incoming steam. Try making sure all of
your radiators and any piping you see has a pitch back towards the
boiler. Shimming up the ends of the radiators and making sure the
pipes don't sag where they have long lateral runs

..
wrote:
Hi,

there is an air vent on the stream riser pipe in my apt.
The vent usually goes bad and starts producing loud noises (like
banging
with a hammer). That I assume happens because the pressure on the
stream riser
pipe can be quite high at times.

I don't even know why the air vent was placed there on the first place.
There is just a whole drilled in the pipe and in this whole the vent is
screwed in.
I presume they placed the vent so that the stream rises faster.

Can I remove completely the vent and just place/screw a bolt
where the air vent was? I am hoping that would remove the loud banging
problems. Any suggestions?

TIA
michalis