How do you get an inhibitor into a closed system?

[Deansplit]

Just a curiosity Q as plumber will connect up the boiler, but in a sealed, pressurised C/H system, how on earth do you get the inhibitor into it??

 

[Agile]

It can usually be poured in somewhere.

Its fiddly but can be injected into a rad air bleed screw as a last resort.

Tony

 

[Deansplit]

Oh I see, so literally remove a valve and pour in with a funnel or something?

 

[Burnerman]

Isolate one convenient radiator, and drain some water out of it....if you use something like Fernox F1 concentrate you can inject it through the radiator bleed valve hole - comes with a kit for this.
If the rad has a blanking plug at the other end, remove this and so much the better.
If it hasn't, just allow more water to drain as you inject the stuff in.
Repressurise the system as you bleed the residual air out when the job is done.
John

 

[Charnwood]

Fernox Express.
http://youtu.be/pi7hd7rM8X0

Sentinel do a similar product at a similar price, but you have to purchase an adaptor. Fernox Express comes with all you need to do the job.

 

[MoodyMick]

i use an adapted hozelock pressure sprayer

 

[Whitespirit66]

If you have modern type rads, with a 1/2'' blanking plug on one top corner, and the larger bleed valves on the other top corner, you can use a dosing kit. They fit in place of the cap on a litre bottle of inhibitor. The other end of the hose screws into the thread on the rad when the plug is removed. These inhibitors are usually more ecnomical than the concentrated ones.

http://www.screwfix.com/p/no-nonsense-1ltr-filling-kit/98940?_requestid=351153

 

[kirkgas]

Untitled

• kirkgas
• 17 Apr 2011
• 3

this is what i have made for this job from the bits and bobs lying about the garage, there are various ways to convert from the wash machine waste spigot (which has a 3/4" BSP thread) to a 1/2" BSP thread to screw into the rad

 

[Charnwood]

http://www.eezyfill.com/

 

[DeltaT2]

Here's Tomplum showing you how it's done;

http://www.youtube.com/user/TheTomplum#p/u/103/gOly7uizLmk

 

[Charnwood]

I like his tip re printing tiles:
http://www.youtube.com/user/TheTomplum#p/u/0/Yre_f-c9VY4

 

[kevindgas]

simply put in through the filling loop! can't believe how many struggle with contraptions screwed onto rads! the other easy way is via the towel rail if one is fitted

 

[DeltaT2]

I like his tip re printing tiles:
http://www.youtube.com/user/TheTomplum#p/u/0/Yre_f-c9VY4

Tom is a great guy & Im honoured to call him a pal. Very sad that he recently lost his big mate Tetley(Graham), that I think was a member here?