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Rev 8.1 Oct-15 Page
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MD Clearance and Connection Requirements
Connection
Size
Notes
Mains
Water Feed
½” BSP M
An isolation valve must be
installed on the mains water
feed for servicing.
Break Tank
Overflow
22mm
Guidance on drainage
requirements should be
obtained from the local water
authority.
System
Connection
½” BSP M
/ 15mm
The pressurisation unit and
expansion vessel should be
connected to the system at the
same point.
The point of connection should
be in the system return, on the
suction side of the circulation
pump.
Non-return valves, pressure
reducing valves and RPZ valves
must not be used.