The supply of water and energy is one of our most
critical National problems. If we cannot increase our supply,
then it's imperative to reduce our consumption. Fortunately
it has been proven that we can conserve dramatically and in
a manner, which will not seriously affect the lifestyles we
have become used to.
Water and energy conservation are so intimately intertwined
that they are practically synonymous. Any reduction in the
usage of water will automatically result in a reduction of
the use of energy. What this means, therefore, is that our
whole philosophy on the use of water is changing and we are
finally recognizing that we have been water rich over the
years and it is now time to get back to reality by adjusting
to our actual needs and to practice good conservation principles.
In the UK mains water pressure varies considerably; older
properties that have, not had, their mains supply upgraded
may have less than 1bar of pressure. This is insufficient
for most modern appliances such as the combination central
heating boiler, which requires water pressures of above 1
bar to operate and receive an acceptable flow rate of water.
At the other extreme, where for example a new water main
has been laid to service a new development such as a new Hospital
or commercial estate, water pressures could rise to above
10 bar, this may cause damage to older existing installations
due to the stress caused by increased water pressure on pipework
The average mains water pressure tends to be around 3 bar
during the day and slightly lower at peak usage times. However
as usage drops during the late evening and early hours the
pressure rises, and has been known to exceed 10 bar.
What is a water pressure regulator?
A pressure-reducing valve acts as a buffer between the high
water pressure supply and the system or appliance. The mains
water pressure is reduced to the safe required level during
flow or non flow conditions.
Also called water pressure reducing valves they are compact,
inexpensive regulators that perform two functions: (1) they
automatically reduce the high incoming water pressure from
the water mains to provide a lower, more functional pressure
for distribution in the home; (2) they "regulate"
by maintaining a set pressure in the home usually 50 Ibs.
thereby insuring that the home piping and appliances operate
under a safe, more moderate, but satisfactory pressure.
The Watts DRV15E is a compact pressure reducing valve for
domestic plumbing systems. 15mm compression fitting. Brass body.
Nbr diaphragm. High impact plastic bonnet.
Max. supply pressure: 375psi (25bars).
Max. outlet pressure: 90psi (6bars)*
Min. outlet pressure: 23psi (1.5bars)
Operating temperature range: min. 1°C - max. 80°C
Suitable for water, air, neutral gases and non corrosive
liquids.F1/4" pressure gauge connection point.
What is water pressure?
When a fixture
i.e. a tap, shower etc in a home is opened and water flows
from it, it is because the water is "pushed." This
"push" is pressure. The speed at which water flows
from the opened outlet depends on the amount of "push"
or pressure which exists at that time in the system. In short,
the higher the pressure, the stronger the "push"
behind the water.
What is wrong with high water pressure?
High water pressure, which is generally considered
anything above 60 Ibs., has some advantage, such as in firefighting
systems. However, in the home plumbing system, it can be damaging
because water, with a strong "push" behind it, can
erode or wear away many materials and cause leaking water
heaters, banging water pipes, dripping taps, dishwasher and
washing machine noise and breakdown, and leaking water pipes.
Therefore, water flowing at a rate in excess of that necessary
to satisfy normal fixture or appliance demands becomes damaging,
wasteful and reduces the life expectancy of equipment in the
system. But, probably most important to the average homeowner
is that it can add to the cost of water, energy and waste