Can anyone help - I have a problem with dhw but I can't seem to drain the system to be able to take a look at the diaphragms etc, i have switched off the mains water and power, I only get about a pint of water from the drainining point on the boiler - any ideas?
I need to be able to check the condition of the diaphragms, usually i just slip a pipe onto the outlet tap and the boiler drains, I don't need to drain the radiators, just the boiler, to remove the pressure from the diaphragm housings so that I can unscrew them without water pouring out.
I get a pint or so and then the water stops draining. We get very little limescale here so i don't think that is a problem, the water that does drain is very clear and does not suggest that there is a problem with dirt etc.
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