On 21 Nov, 22:22, "BigWallop" wrote:
wrote in message

...



On 21 Nov, 21:55, (A.Lee) wrote:
wrote:
I need to refill inhibitor again as there was quite a bad leak in the
system, I have bought Sentinel X100 concentrate (BTW it was quite
cheap at Homebase, Twelve forty nine only). However the instructions
differ slightly to the Fernox product I used previously.

The instructions state that you must depressurise the system if it is
a sealed system, I suppose this is to prevent the inhibitor spitting
back out which was rather messy with the Fernox product.
Can I depressurise by bleeding the water out of a radiator until the
pressure is 0.0 bar?. I don't mind doing that.

Just turn off one radiator at both taps, then drain off a litre or 2
from that radiator by undoing the tail nut near the tap.
Remove either the bleed valve or blind plug at the top of the rad, then
pour the inhibitor into the rad. Fill it up with water as much as you
can then, put the plug back in, turn on the rad valves,bleed it, then
check the pressure at the boiler, it should have only gone down by a
tiny amount.
If you have not got the screw-in plug/bleed valves on your rads, then
you'll have to drain it down a lot more to pour the inhib into the
pipes.
Alan.
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No, this is a concentrate product which is injected by a mastic gun.

http://www.sentinel-solutions.net/en...00/concentrate

The technique described by Alan is OK for any type of inhibitor or cleaning
product. Just do the instructions he has given and inject the product into
one radiator. When the system is running it will disperse the solution
around the circuit without any problem. You don't have to do anything
special to add these products to the system. Adding it to one radiator is
enough once the system gets running again.

Good luck with it.

Ok I understand (nearly) so how and why do I have to pour water back
in the radiator?
Are you 100% sure the inhibitor won't start spitting back out after I
remove the adapter?

Thank you, I am a new to this kind of thing.