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I just moved into my new flat and the boiler is probably around 20 years old. It's a sealed non-condensing Valliant Turbomax VUW 242 and on it's last legs. Just got the circuit board replaced with a refurb off eBay while I save some pennies.
The system is a mix of 15mm and microbore copper pipe with a bit of sludge in the system. Got a few cold spots on the bottom of a few rads but nothing excessive. I don't think a powerflush will do anything to an old microbore system other than cause leaks.
I was thinking of adding some chemical cleaner, running it for a little less than the recommended time (incase of pinhole leaks), isolating the flow on the boiler and using the quickfill to do a MW back flush. I haven't found a drain point yet so was planning on removing the bathroom rad and running a hose from the flow pipe to the WC from there.
Then (someone correct me if I'm wrong) I could attach a hose to the flow pipe of the removed rad (boiler still isolated) and do a forward flush that way to remove anymore crud in the system.
Or will a magnetic filter installed with the new boiler achieve the same result after a while and MW flushing a waste of time?
The system is a mix of 15mm and microbore copper pipe with a bit of sludge in the system. Got a few cold spots on the bottom of a few rads but nothing excessive. I don't think a powerflush will do anything to an old microbore system other than cause leaks.
I was thinking of adding some chemical cleaner, running it for a little less than the recommended time (incase of pinhole leaks), isolating the flow on the boiler and using the quickfill to do a MW back flush. I haven't found a drain point yet so was planning on removing the bathroom rad and running a hose from the flow pipe to the WC from there.
Then (someone correct me if I'm wrong) I could attach a hose to the flow pipe of the removed rad (boiler still isolated) and do a forward flush that way to remove anymore crud in the system.
Or will a magnetic filter installed with the new boiler achieve the same result after a while and MW flushing a waste of time?
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