Descaling the BoilerMate II

Hi,

First of all, thanks for making all the information about these systems freely available. You've already saved me a lot of time and money!

Having read boilermate-repairs.co.uk, it's obvious to me that I need to de-scale the heat exchange coil. What are the conventional chemicals and techniques for doing this? The pdf I downloaded from the Gledhill website says to use the Vortex Decalomat-3, but I assume these aren't available any longer. In which case, does it matter which flushing pump I use?

Any help would be great,

Many thanks

Kev

I use a small descaling pump.
And Fernox DS3.
But you really need a modified mixer valve to connect with.
The instruction are in the BM book.
Mike

Hi Mike, are those modified mixer valves still available to buy from Gledhill?

Yes they are.
They will make you one upon request
Mike

Cheers, I'll give them a ring tomorrow to see how much it'll set me back

Hi. Mike thanks for the forum, its been a great help so far with my aging boliermate that was put in without any chemicals and multiple issues some 10 years ago. I think a common situation in new builds in the Milton Keynes area!

I'm now thinking of descaling the exchange coil as water temp is low during the winter and the system is 10 years old but I've got a couple of issues to clarify first if anyone can help?

1) I've not been able to locate a source to hire a descaler and all HSS can offer is a central heating flusher and I'm not sure that it would be good to use this for descaling due to the pressure, although I assume that chemicals etc would be OK. So, if I can't get hold of the correct device I thought about just pumping the chemicals through from a bucket using a drill pump but again have an issue regarding potential spill and maintaining safety while using chemicals.

2) Rather than using special valves from Gledhill in place of the mixer valve I was wondering about using compression couplers to flexible pipes or whatever is required for the descaler coupler. However, having measured the pipework into the mixer valve it doesn't seem to be a standard size for 22mm or 28mm couplers.