Combined Antifreeze and Inhibitor

[Stones]

I'm planning to top up the antifreeze/inhibitor in my system via the Fernox magnetic trap. The manual specifies propylene glycol antifreeze (toxicity class 1).  So far, so good.  Clearly there are many brands of combined antifreeze/inhibitor available.  Ideally I would use the same brand as used before but as I can't remember what was used, and the manual does not recommend a specific product, are there any potential drawbacks adding a different antifreeze/inhibitor into the system?

[ProDave]

I used the cheap No Nonsense inhibitor / antifreeze from Screwfix.

[Jeremy Harris]

I used exactly the same No Nonsense stuff from Screwfix.

 

There shouldn't be a problem mixing different brands, as they are probably all much of a muchness.

[Stones]

Assumed that would be the case, thanks. 

[Onoff]

Do Screwfix still sell the No Nonsense stuff? I think not. You might get it cheap in B&Q on clearance:

 

https://www.trade-point.co.uk/departments/no-nonsense-heating-inhibitor-500ml/53670_TP.prd#

 

 

 

 

[Stones]

Related question. How long will the antifreeze in the system last/remain effective, assuming it's not been diluted to any extent by repeated pressure recharge?