Stuart Turner S1.3 bar Twin - Manual (Page 7)

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2 LOCATION - SINGLE PUMP
2.24 The cold water supply: Must be a DEDICATED AIR FREE supply via a tank
connector, and must be positioned at a slightly lower level (25 mm minimum) than
the feed pipe to the hot water cylinder.
Do not connect to the mains.
Positive Duty Single Pump System
Fig. 2
Static Inlet Pressure Min. 0.5 m Max. 6 m
Outlet head must be
below bottom of cold
water tank and able
to pass a minimum of
1 l/min of gravity flow