flush out underfloor and fill with inhibitor and anti-freeze?

[moony]

i have been asked to flush and re-fill heating system with inhibitor and anti-freeze... its for a regular customer and although i do powerflushes i have never done one on underfloor heating, and what does he mean by anti freeze? this guy is a marine engineer but retired - very very knowledgable and a lovely chap so dont want to turn down the job but also dont want to look a total numpty when it comes to the underfloor heating being flushed and i need to know what anti freeze he is on about?

hes a keen internet buff so put this in the plumbers arms for a bit of privacy


cheers in advance lads

 

[diamondgas]

Moony sentinel x500 X500 Inhibited Antifreeze | Liquids | Central Heating | Sentinel central heating products is one you can check out 🙂 Only thing I was told about ufh is air locks are a mare to get out! I'd imagine you'd have to do each circuit separate yeh?

 

[Gray0689]

Yes do each circuit separate
Don't use a flushing machine just connect the mains on to manifold with a hose going out then just let the mains flush it out then close each circuit with clean water in and move on to next one
Then if there is a rad anywhere fill with the antifreeze and let mix
There is normally conections on manifold to connect to

 

[moony]

And you can shut off each circuit separately? Using the actuators?If there isn't a rad on the circuit how would u suggest doing it? I'll check out the sentinel stuff too cheers DG

 

[Gray0689]

The actuators are off unless calling for heat if you can get me a pic of the manifold I'd be able to tell you more

If no rad then you will have to get a pump and pump in as you pump out water till antifreeze in then just shut off and pressurise that is if it's a sealed system