INSTRUMENT OPERATION
1. Hold the handle with the splash guard
facing upwards (fig.a), and drop
the flow cup through the top of the
handle ring.
2. Ensure that the handle is orientated for
either left-handed or right-handed use,
and that the ring clips onto the flow cup
around the front and back of the cup.
3. If purchased with a digital thermometer,
remove the probe cover, and insert the
probe into the hole at the top of the
flow cup, on the opposite side of the
handle. Switch the thermometer on with
the ON/OFF button.
4. Hold the flow cup under the running
water, ensuring that the water flows into
the opening at the top of the flow cup. The
running water will then flow through the
cup and will rise up the scale on the side of
the flow cup, and out of the bottom hole.
5. We recommend letting the water flow for
30 seconds to 1 minute to allow for
the water to reach its highest or lowest
temperature. Using the thermometer,
wait for the temperature reading to
stabilise before continuing.
6. Use the highest point the water flow
reaches and use the scale to determine
the water flow in Litres per Minute
or Gallon per Minute (fig.b). Make a note
of this reading and also the reading
from the thermometer, using the HOLD
button if necessary to freeze the display.
Whilst the temperature is held the °C
symbol will flash. Press HOLD again to
continue measuring.
To calculate the time it will take for a water
container to fill up, follow the above instructions
to achieve a Litres/Gallons per Minute result
and the use the below calculation:
The unit incorporates an auto-power
off facility that turns the instrument off
automatically after ten minutes.
The ETI Flow Cup is an excellent value-for-money
and easy to use device for measuring the
flow of water from a tap, hosepipe or any
other water outlet. This device is perfect for
use prior to the installation of appliances
such as combination boilers, to ensure that a
sufficient flow rate is available.
In older properties, water pipes had a smaller
diameter (approx. 15 mm) which meant
when modern appliances were used, such
as dishwashers and power showers, the
amount of water used can cause low flow
problems. Newer properties usually have
much larger pipes (approx. 25 mm) meaning
the water flow will be a lot higher when
using numerous appliances.
Flow rates are also dependant on the size of
the taps (½” or ¾”), and a lot of modern taps
will have a reduced flow rate.
Below is a table of approximate flow rates:
Using a water flow cup can be a great way of
determining whether the flow rate of water
is sufficient enough from your water outlets,
and also useful to use when trying
to calculate the time it will take to fill up a
large water container, such as a water heater
or swimming pool.
Litres/Gallons
per minute
result
Time in
minutes to
fill container
Capacity
of
container
÷ =
Flow rate in Litres
per Minute (l/m)
Standard ¾” bath tap 15 l/m
Standard ½” basin tap 12 l/m
Modern Monobloc
bath mixer tap with
10-12 mm connections
12 l/m
Modern Monobloc
sink mixer tap
8 – 10 l/m
Gravity shower 10 – 12 l/m
Electric shower 2 – 6 l/m
Power shower 12 – 15 l/m
Mains fed systems 15 – 25 l/m
Fig.a Fig.b
