Biasi Radiator Bleed key

[Hobartian]

I live in Australia and have Biasi radiators installed in my home.

I have been trying to buy a key so that I can bleed air from the radiators but have not been able to do so as hydronic radiators are uncommon here.

Can someone please advise the exact size of the key and whether they are commonly available. I have seen radiator keys on sale at Ebay UK but don't know whether they will fit Biasi radiators.

I have been using a screwdriver to open the bleed screws but unfortunately some of the slots in the keys have been damaged and a screwdriver will no longer do the job.

 

[mountainman]

Not really mate as Biasi roundtop rads have particularly small squares.
Ps I thought Hobart was in Tasmania!

 

[GQuigley67]

Radiator Key Brass Air Vent Clock Type: Amazon.co.uk: DIY & Tools

this is my trusted rad key, fits almost all radiators i come across, not too sure about the biasi ones

 

[mountainman]

Radiator Key Brass Air Vent Clock Type: Amazon.co.uk: DIY & Tools

this is my trusted rad key, fits almost all radiators i come across, not too sure about the biasi ones

It won't fit mate, square hole is too big.
Never measured but I would guess Biasi bv's are 4mm.

 

[on31ll]

are theses the ones with the intenal bleeding point ? do they have blanking plugs at the end ? change these for standard bleeders and buy a standard key ? making life easier or install alladin self bleeders ?

 

[Hobartian]

Thanks for all the responses.

I have followed on31ll's suggestion and I have purchased five Alladdin Radiator Vents Model: 30209 to replace the existing vents. At 9.99 pounds each they are not cheap but I am looking at the long term advantages of having them installed.