“Each pump has a different design,
meaning each installation will be
1. With the isolating valves turned off,
re-fill the hot and cold-water system
and ensure all non-pumped outlets are
2. Next, open the inlet isolating valves
and check for leaks on the hose
3. With all pumped outlets off, open the
outlet isolating valves, and again check
4. After the water has been restored,
before turning on the electricity to
the pump, make sure to allow as much
natural flow through pumped outlets
as possible to ensure the pump and
all pipework is flooded. Do this by
opening the taps or shower fully and
run both hot and cold water for a few
minutes. If it’s not possible to obtain
a natural flow, such as if the pump
is in a negative head situation. Then
discharge water from the pump’s
outlets into a bucket, by using some
pipe connectors or hoses, to ensure
the pump is full of water.
5. Once these steps have been completed,
the pump can be plugged into a
socket or wired into a fused spur.
Switch on the electrical supply to the
pump – negative head pumps will now
operate briefly to charge up the outlet
pipework – and then turn on all the
outlets one at a time, to ensure the
pump pressure is as desired.
6. Re-check the full installation for any
leaks before tidying up.
7. Provide the customer with all relevant
literature and advise them on how to
register the warranty.
need to be taken to the appliances
being added to the pump, for example
a shower. If this includes any up and
over pipework, it’s best to fit air vents
on the highest point of the system. If
the whole hose is to be supplied, there
needs to be a dedicated vent pipe from
the cylinder with the outlet of the
pump supplying the whole hot water
supply. This supply should not be
linked back into the vent, as this will
cause the pump to push water back
into the vent and the cold-water tank.
9. If the pump and hoses had been
removed before soldering, then re-fit
these and be sure to fit filter washers
to the inlets of the pump, ensuring the
standard flat washers are on the outlets.
www.hpmmag.com | MAY 2019 | Heating & Plumbing Monthly 25