S
Synec
We have a Megaflo that was installed some 12 years ago. We are in a hard water area and we have some measures in place to reduce limescale - but not a water softener. The Megaflo was serviced about 15 months ago. Now we have low pressure (drops rapidly from 2.7 bar to 0 on HW out) through the megaflo with a steady 2.7 bar going in (there are pressure gauges on both sides). We have been in touch with local unvented specialists and chatted to the plumber about the problem over the phone. We have also spoken to Megaflo direct (my wife specifies hundreds of Megaflos as a consultant engineer). The common view is that there could be a blockage in the CW feed to the base of the tank caused by scale, discounting a blocked/ dirty PRV cartridge which the plumber will do to exclude it as a cause. The plumber commented that he has been unable to find a good method of cleaning the downward curving feed pipe in case of low level blockage. He also admitted to having recently replaced his own Megaflo at home for the same problem after 13 years. Accordingly a replacement Megaflo along with a water softener is now recommended. Before we take this step can anyone comment on the difficulties of clearing a blockage in the location described and is a dozen years' service in a hard water area par for the course for these stainless steel (and expensive) wonders?