Megaflo cylinder with Potterton Suprima boiler question

[smmjh11]

Hi

I have moved into a house that I assume has an unvented system. My old house just had a basic conventional boiler which caused no problems in 20 years. I periodically put in Sentinel x100 inhibitor and was wondering whether I can do this with the new central heating system. I have a megaflo cylinder and a Potterton Suprima boiler. From what I have looked at on the internet I assume it is a unvented sysyem which is pressurised as there is a small expansion tank with a pressure gauge. My question is can I put any inhibitor in the system or is it not required on these type of central heating system.
Thank you in advance for any responses

 

[muggles]

All types of heating system should have inhibitor in, and overdosing is much better than underdosing, so by all means put some more in. You have a sealed system, the 'unvented' bit refers specifically to your Megaflo

You might find it easiest to use something like Fernox F1 Express and inject via the filling loop

 

[Agile]

Although always recommended in the UK, its not normally used in places like Germany although they do properly clean systems unlike most installers here.

A sealed system cannot get anything in or out !

My view is that inhibitor only does anything much when a cleaned system is filled for the first time.

I always add it though when fitting a new boiler as the British Standards require it and I always comply with requirements!

Tony