air locks in hot water pipes and kettling

[steviebabe]

i have a f+e tank in loft and a boiler i dont know the name of i keep having to get air out the system ,the hw cylinder has no stat on is there anything i can add to my system to cure it or do i need a professional in

 

[compheat]

you can isolate and drain system and refill using X400 sludge remover, leave it in for a few days with your heating on full. drain down for 2nd time and refill and drain a couple of times untill water looks clean. vent all radiators when draining to let water out of rads. then refill adding Sentinal X100 inhibator it should make an improvement