Manual Mixer Showers.
Manual mixer showers are usually
the cheapest
to buy and to fit.
Sometimes a manual mixer is fixed onto the wall of a shower cubicle.
Sometimes the bath taps and have a hose running up to the shower head.
A knob or lever on top of the bath taps sends the water either up the shower hose
or down into the bath.
It is not recommended to use a
manual mixer if the water supply is unbalanced.
A manual mixer can work well if
the hot and cold water pressure which supplies the
shower is balanced BUT there is a serious risk of scalding
(see below).
A manual mixer shower has several disadvantages compared with other types.
If your cold water to the shower
is at mains pressure
and your hot water is stored at mains
pressure, the flow rate through
the shower will be good and temperature control may be adequate.
The disadvantage is that the temperature will change if someone else in the property
runs some water while you are in the shower, or the cold water supply is shut
off.
There is a serious risk of scalding and you can be
left with skin burns.
The way to avoid this is to use a thermostatic
mixer shower.
If your cold water to the shower
is at mains pressure
and your hot water comes straight from a combination
boiler, the flow rate
through the shower will be good but temperature control may not be adequate.
There is also a serious risk of scalding, see
above.
If the water system supplying the
shower is gravity fed, then the flow rate
is probably too slow to give a good showering experience.
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