Water noise from boiler magnetic system filter?

Coco00

Hi all,
last week I had a new Worcester Bosch combi boiler installed, and also a mini Greenstar Worcester system filter right next to it. Everything seems to be running ok, but when the boiler is on, there’s a constant trickling water noise coming from the filter. It’s starting to drive me slightly bonkers as I’ve got a semi open plan kitchen & living room. I’m assuming this isn’t normal and it should be quiet? My friend has the same make, and his is pretty much silent. 

Could it just be trapped air inside? Has anyone ever bled air out of one of these? I’ve done all the radiators and a bit of air come out a few of them (one bed flat, 6 rads) but I’m a bit nervous about doing the filter. My radiator key fits in the top bit perfectly, but as the manual only refers to doing this as part of adding chemicals, or a general clean during service, I don’t want to mess it all up! Is it basically like bleeding a radiator in principle? 

Thank you.

Lorian

Yes they can trap air and then gurgle. On the mini you can bleed it using a radiator key on the top of it just opening the silver valve not the whole thing. Only do it when the system is cool and open it only very slightly until it starts to pass water. Put a cloth under it and don't go unscrewing it out far

It is just like doing a radiator just a bit more spitty.

Check the boiler pressure is ok when done.

Coco00

Thank you Lorian, I’ll give it a go in the morning.

Dulbert

Coco00 said:

Hi all,
last week I had a new Worcester Bosch combi boiler installed, and also a mini Greenstar Worcester system filter right next to it. Everything seems to be running ok, but when the boiler is on, there’s a constant trickling water noise coming from the filter. It’s starting to drive me slightly bonkers as I’ve got a semi open plan kitchen & living room. I’m assuming this isn’t normal and it should be quiet? My friend has the same make, and his is pretty much silent. 

Could it just be trapped air inside? Has anyone ever bled air out of one of these? I’ve done all the radiators and a bit of air come out a few of them (one bed flat, 6 rads) but I’m a bit nervous about doing the filter. My radiator key fits in the top bit perfectly, but as the manual only refers to doing this as part of adding chemicals, or a general clean during service, I don’t want to mess it all up! Is it basically like bleeding a radiator in principle? 

Thank you.

Hi .... did you ever get this sorted? just had the same filter fitted on a new boiler and i have the same noise, just sounds like water trickling, cant be right

FFHillbilly

have you tried bleeding the top of the filter with a radiator key?
those new Worcester's are whisper quiet I've never heard noises from them

Coco00

Hi, yes I did have a go at bleeding the filter, as suggested back in December. It was exactly the same as doing a radiator, and quite easy, just found it a bit difficult to hold the key at that angle. Loads of air came out, and then it was really quiet for a few days, then the odd noise started again. I think I did it a few times throughout the winter, and the same thing happened.
From what I understand, air can be introduced into the system when you have work done, so I’m hoping it wont need doing too often in future, but at least the bleeding does seem to sort the noise out if it gets on my nerves. I’ll be mentioning it when my first service is due this winter, so I’ll post back if the engineer says anything useful! 

ThisIsWeird

Boiler off - pump not running during bleeding.

System ideally cool - for safety.

Repressurise system - if it's a sealed type - to 1bar or slightly above.

If significant amounts of air keep reappearing, then it should be investigated further.

poppellerant

I'd also bleed the radiators at the same as bleeding the filter, just in case there are small air pockets travelling through the system.  When bleeding, keep note of which radiators let out air and if they let a lot of air out or just a bit - you might have a radiator on the way out.