(1) Water from the main enters
through a manually operated gate valve and inlet
(2).
(3) The submersible pump recirculates the
pond water through the effect and its self-contained
filter screen. (4) A small
ball valve provides manual control for the effect
height. (5) The jet head for
the effect is base mounted. (6)
A water makeup unit consists of a sensor, solenoid
actuated valve, and control circuitry to add water
lost by evaporation. This is set to maintain levels
between two depths. Simple float valves are also
available for this. (7) A low
water cutoff (LWC-1) senses the water level and
turns power off when the underwater lights are not
submerged. A number of lights may be protected by
this unit. Some underwater lights have self-contained
LWC's. (8) The underwater lights
are base mounted, and wired into an underwater junction
box (9), with the pump. (10)
The junction box is conduit connected to the control
box, which contains the timer for pump control and
the lighting controls. (11) Overflow drain removes rain
or excess water; may also be unscrewed to drain
pool.
This illustration shows the typical
components of a simple, single-effect lighted fountain.
The hydraulics must be capable of providing the
flow required by the jet, and the power supplied
to the electrical control box must be adequate to
meet the needs of all electrical components. To
contain the water from the effect, the pool's minimum
width should be twice the height of the effect.
Penetrations are required for the water inlet, drain
and electrical conduit.
