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How do they work in comparison to the Magnaclean's - they don't seem to be magnet based, perhaps swirl pot style filter?
Company called Viessmann Direct... Found it purely by chance. Even the eBay specials wanted £65 for the MB3's... The RV's were even more everywhere I looked
Reply to the thread, titled "Replacing stopcock, which size" which is posted in UK Plumbers Forums on Plumbers Forums.
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.