need to replace two valves, and drain system down. DIY job or get someone in

[robpeake]

afternoon all, last winter i had a couple of radiator valves that started weeping, one had been the year before and i put a small cup under them with the plan on changing them. I understand its a drain the whole system down, i have a drain plug on the rad in the utility room that i can use.
I haven't bought any valves yet but will have a look on screwfix or toolstation for the right ones.

the radiator tank in the loft has a bit of flimsy wood so no lid as such and its full of gunk, so i was going to wet and dry hoover all that out then try to drain it dowm.

i'm ok with DIY after watching a few how too's is this the tpe of thing for a DIYer or call ina plumber. my worries are, i drain it down and get a air blockage or worse, some crap in the system blocks it up, and the trying to undo the valves and twisting them or breaking them

 

[oldbutnotdead]

The carp in the system is the biggie to avoid- good call on the wet & dry vac.
Key to not destroying stuff is at least 2 good wrenches- one to hold the valve/whatever steady against the loosening/tightening force you'll be applying with the other.