Boiler Annual Service Check "Sys inhibitor check [..] in accordance with BS 7593"?

[tellme_why]

Hi,

Reading my Vaillant 10yrs Guarantee T&C and the benchmark logbook requirement.

There is one record check "System inhibitor checked in accordance with BS 7593";
- How this check is done
- How much does it cost / is it included in the service charge fee?

Many Thanks

 

[Exedon]

You use a test kit! Both sentinel and fernox make them.
We build cost of test into service as it's now a requirement.
We do change if inhibitor needs topping up.