As per the title. Should it get everything out?
The reason I ask is that about 18 months ago, as part of a conversion to unvented hot water cylinder and a sealed system, I had a power flush. It didn’t half get some muck out. I hadn't had any inhibitor in the system for around 25 years and before the flush, whenever I bled any rads, the water would come out like black ink. After the flush and with inhibitor, the water from the rads ran crystal clear. The old header tank had about two inches of mud in the bottom of it! After the conversion to a sealed system, I changed all upstairs rads - two were leaking and the rest were just original 50 year old rads. The downstairs rads had all been replaced within the last 10 years or so.
Anyway, while decorating the hall, I removed two radiators. Black water came out of them. I’m assuming this was sediment still in the bottom of the rad that the power flush didn't clear. I took them outside, ran a hose through them, swilled, drained and repeated until all running clear. Should the power flush have cleared out all standing sediment or had it been just too long without any inhibitor?
I’m going to have my boiler changed in the next month or two so before that is done, would it be worth my while removing the remaining downstairs rads and flushing/swilling them out and then just having a chemical flush before a new boiler is installed?
The reason I ask is that about 18 months ago, as part of a conversion to unvented hot water cylinder and a sealed system, I had a power flush. It didn’t half get some muck out. I hadn't had any inhibitor in the system for around 25 years and before the flush, whenever I bled any rads, the water would come out like black ink. After the flush and with inhibitor, the water from the rads ran crystal clear. The old header tank had about two inches of mud in the bottom of it! After the conversion to a sealed system, I changed all upstairs rads - two were leaking and the rest were just original 50 year old rads. The downstairs rads had all been replaced within the last 10 years or so.
Anyway, while decorating the hall, I removed two radiators. Black water came out of them. I’m assuming this was sediment still in the bottom of the rad that the power flush didn't clear. I took them outside, ran a hose through them, swilled, drained and repeated until all running clear. Should the power flush have cleared out all standing sediment or had it been just too long without any inhibitor?
I’m going to have my boiler changed in the next month or two so before that is done, would it be worth my while removing the remaining downstairs rads and flushing/swilling them out and then just having a chemical flush before a new boiler is installed?
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