Necessary to add inhibitor to CH system with softened water?

[Just_back_from_the_pub]

My folks have got a small leak on one of their radiators - a low level type in the conservatory. The system is sealed, powered by a Vokera Linea 28 boiler. I am intending to drain down the system, remove the rad, take out the thermostatic valve and re fix it with a few layers of PTFE, refit and refill. What I am wondering is when I refill would it be necessary to include some (Sentinel) inhibitor?

Because they live in a hard-water area they have a water softener. With 'softened' water being in the system does this then eliminate the need any inhibitor?

Thanks in advance for any help.

 

[kevplumb]

in a word no

 

[corgiman]

I would say yes as softened water can still sludge up.

also It was always my undertsanding NEVER to have treated water in a heating system, but I am a little foggy on this so could be wrong

 

[kevplumb]

Because they live in a hard-water area they have a water softener. With 'softened' water being in the system does this then eliminate the need any inhibitor?

sorry if my answer was misleading

this was the bit i answered

 

[corgiman]

Know I am just confused

what was the question

 

[Just_back_from_the_pub]

Know I am just confused

what was the question

The question is if the water in the CH system is softened, does there still exist the need to have inhibitor in the system?

 

[kevplumb]

yes

 

[Just_back_from_the_pub]

yes

Blimey, that was quick! Thanks, Kev.