Inhibitor point on a heating system

[Jupiter01]

I’ve seen videos where inhibitor is added via a bleed valve and all of the pain that goes with that. I was wondering if some sort of device can be added to a heating system which makes the adding of inhibitor easier in the future?

 

[Iamchamps]

I normally add via the towel rail in bathroom very easy

 

[Lower]

I drain my magnetic filter enclosure and fill that. Very easy.

 

[MeldrewsMate]

You can add a dosing point to any system, but I have only ever seen them on larger systems and in plant rooms. This is because they are too large, bulky, and unsightly for domestic installations.
Adding via a towel rail (with top mounted vents) is easy and convenient, as mentioned above.
I've modified a chrome blanking plug from a towel rail/radiator and added a schraeder valve (car tyre valve). Attaching this to the top of a towel rail means I can use a cycle pump or car tyre pump to depress the water level in the rail, shut the towel rail valves, and conveniently pour in heating chemicals. For most, though, draining or syphoning a couple of litres from the rail suffices so that inhibitor can again be poured in.

Do you have a magnetic filter (Magneclean, Fernox TF1, etc)? They too are designed to allow easy addition of chemicals.

 

[Jupiter01]

Thanks guys. I have a magnaclen and towel rail. I’ve just YouTubed those methods. Many thanks

 

[Jupiter01]

Is this the go-to inhibitor or do you recommend something else?
https://www.toolstation.com/sentine...4R27AWKOyZzCdmJ_TUB4zxoCJSYQAvD_BwE#full-desc

Do I need 1L for a combi system that has 9 radiators?

Finally, (I am hoping this won’t be required but if I need to drain down the system before adding the inhibitor, do I need to bleed air out of all the rads and does this need to be done in a particular order?

Thanks again.

 

[sxturbo]

Sentinel or fernox is fine

I've used this in the past it makes it very quick and very easy with virtually no mess

https://www.toolstation.com/fernox-...mIUtb1FgSf6WoVgbxNtL3cWPI304pstxoCKl0QAvD_BwE

also 1l bottle or one of the rapid dose kits do enough for a 10 rad system

 

[Deleted member 267285]

Sentinel x100, Fernox F1, Adey MC1 just as long as it’s not a cheapo version. To add it, just isolate the rad you’re adding it to (noting lockshield turns), drain via drain point or crack a nut to drain enough out, then just bleed this rad when you re-open valves.

Just re-read MM’s post in which he does state this.

 

[fixitflav]

Thanks guys. I have a magnaclen and towel rail. I’ve just YouTubed those methods. Many thanks

While you're at it - put some of the water from the Magnaclean in a jar, and add a few bright wire nails. Check they haven't gone rusty in a couple of weeks to confirm the inhibitor is doing its job.

 

[Jupiter01]

crack a nut to drain enough out, then just bleed this rad when you re-open valves.

Should the air vent be open when draining from the open nut?

 

[Deleted member 267285]

It would come out quicker yes, but will still dribble out.

 

[Jupiter01]

Is there a scenario (dodgy TRV?) where draining the system becomes necessary?

 

[sxturbo]

Is there a scenario (dodgy TRV?) where draining the system becomes necessary?

Dodgy trvs usually can be fixed with a Tap of a hammer.

It's doubtful you will have any problems isolating the radiator