How can I find the lowest hot water tap on my system

[nodyland]

[FONT=&quot]Its for recharging megaflow unvented air bubble.[/FONT]

[FONT=&quot]Many Thank[/FONT][FONT=&quot]s[/FONT][FONT=&quot]

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[joni os]

On lowest floor of property, Bath, washbasin, kitchen sink. In aerospace terminology , lowest floor equates to floor at lowest altitude.

 

[Best]

Why do you think you need to use the lowest hot tap?
Your thinking can be wrong and can go wrong. If you had a hot tap on a floor much lower than the Megaflow and opened it after isolating the mains water to the Megaflow, you could cause the cylinder to collapse - implode.
You say on another post your hot pressure has been reducing, so that is in fact a fault with the Megaflow or its controls and you need to get a G3 qualified plumber who knows what they are doing to fix it.

 

[Dotty]

As above