Recently my central gas system had got some blockage problems - radiators
not heated up. Since we have a contract with British gas and they came and
'fixed' it temperarily - changing some valves etc. They advised that we need
a power flush to fix the problem for long term, and quoted £550 for our
3-bed semi for the job (in Hertfordshire) .
1. Since we have been in the house for just 4 years and don't know when/if
this was done last, we would like to know how often do we need power
flushing in general ?
2. Is Birtish Gas quotation fair?
Very many thanks in advance.