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Hi, Ive done the work described above and thought it may be usefull to others if I make this last post. After flushing, leaving the system restorer in for 9 days and final flushing. I installed the Boiler buddy. I was dissapointed to find that the copper pipe I cut was still coated with black...

Thanks for the reply Dan. I didn't explain that in the past the diverter valve leaked because of dirty water. The system was cleaned at the time but I have had to top it up occasionally over the years. My in-laws boiler has just had the same problem which prompted me to carry out this...

Hi all, I intend to clean my central heating out by back flushing each radiator one by one with mains water using the filling loop on my combi boiler then add 1 bottle Fernox heavy duty restorer and refill the water. I will then leave for a week and flush again same as before. finally I will...

Just got one off ebay which is described as a new genuine Ravenheat part for £40 inc pp. Ill see how genuine it is when it arrives. The seller did quote the exact Ravenheat part number. Reading the above posts re clean system water, my system should have been flushed when the boiler was...

Ive noticed that Ravenheat genuine parts seem quite expensive, but the boiler (CSI 85) was quite cheap (£500). The diverter valve is over £100 full price. I must say I wasnt expecting any problems within 5 years. Could it be that their boilers are designed to breakdown so that they sell...

Spoke to the BES technical expert who told me they dont have a diverter for the CSI 85AT. He did inform me that the diaphram end can be rotated by loosening the two grub screws, these hold the two halves together. Since my boiler is loosing water pressure, the diaphram is probably OK. I think...

I was wondering if I purchased a ravenheat diverter valve which wasnt the correct part for my CSI85, difference being the layout of the connecters are not the same, but internals are identical. Would it be possible to swap the internals with my existing leaky valve ? there are quite a few on...

Thanks all, Ive decided to replace the diverter with a new one. Ive seen some on eBay but the connecter for the coldwater inlet on the diaphram end is in the wronge position. Would it be a good idea to flush the CH water and replace with clean water and Fernox MB1 ? The boiler is just over 3...

Thanks for the reply ollski, Sounds like a great idea. Can you tell me how much it would cost, were I can get one and how much time to allow to do the job. Also is it advisable to flush the CH water and replace with clean water and Fernox MB1 ? The reason I ask is that ive heard that debri...

Hi, I have a slow leak from my diverter valve roughly in the middle between the diaphragm on the left and the 3 way valve section on the right. The leak is from what looks like a small tube wich connects the diaphragm housing (left) to the 3 way valve (Right), there are holes around its...