Ive decided to flush my CH system (sealed combi worcester 24CDI). we wont go into the the pros and cons on DIY vs power flush here as its been discussed before (here) but i want to weigh up my method over other DIY methods.
i have had a couple of radiators off recently for decorating (and the kitchen one is still off) the sludge wasnt that bad, but i reckon its due doing (system 5years old). i was originally just going to do it via the fill loop and drain, i know it would be best to put ball valves on the flow and return but Ive never done anything like that. then i had an idea- I will connect hoses to the radiator valves (as the radiator is allready off) -this should give lots of flow! an other advantage of this is i can do it all from the kitchen so if something gets wet its not a problem, where as the boiler is upstairs.
-i would expect the above to give (almost) as good flow as ball valves? -any critasism on the above compared to the DIY method decribed here
afew more questions:
from what i have read i should:
-close valves to the boiler to stop my flush washing crap into the heatexchange -right or wrong?
-monitor the pressure? -but the boiler pressure wont read if i shut off valves, and its upstais so no good! i will put a guage on the hosepipe connection (if this is necerssary), but as i will be doing this from downstairs i would expect the pressure to read higher than upstairs? (1.5psi per metre i think??) -so what should i pressurise to when flushing? (-state if you are quoting upstairs or downstairs pressure)-how do i build up pressure-just block the outlet hose watch the pressure rise then release??
i will run a chemical desludger (and inhabiter after) but they generally recomend to leave in the system for a week, or run the sytem for 8 hours etc. but its summer and i really dont want my radiators on! -what can i do? -just run the CH when Im out?
-other posts mentioned particle filters, -should i change these after?
i have had a couple of radiators off recently for decorating (and the kitchen one is still off) the sludge wasnt that bad, but i reckon its due doing (system 5years old). i was originally just going to do it via the fill loop and drain, i know it would be best to put ball valves on the flow and return but Ive never done anything like that. then i had an idea- I will connect hoses to the radiator valves (as the radiator is allready off) -this should give lots of flow! an other advantage of this is i can do it all from the kitchen so if something gets wet its not a problem, where as the boiler is upstairs.
-i would expect the above to give (almost) as good flow as ball valves? -any critasism on the above compared to the DIY method decribed here
afew more questions:
from what i have read i should:
-close valves to the boiler to stop my flush washing crap into the heatexchange -right or wrong?
-monitor the pressure? -but the boiler pressure wont read if i shut off valves, and its upstais so no good! i will put a guage on the hosepipe connection (if this is necerssary), but as i will be doing this from downstairs i would expect the pressure to read higher than upstairs? (1.5psi per metre i think??) -so what should i pressurise to when flushing? (-state if you are quoting upstairs or downstairs pressure)-how do i build up pressure-just block the outlet hose watch the pressure rise then release??
i will run a chemical desludger (and inhabiter after) but they generally recomend to leave in the system for a week, or run the sytem for 8 hours etc. but its summer and i really dont want my radiators on! -what can i do? -just run the CH when Im out?
-other posts mentioned particle filters, -should i change these after?