If
the pump appears to be the problem and you need help with your
investigations, please use the Contact Page to book an appointment for a
PSP engineer to visit. To obtain more information on the PSP Pool
Owners Club, please visit the Members Page. The information on this page
will be added to the appropriate section for members future searches.
Water is pushed through a bed of filter sand and removed through a set
of lateral tubes at the bottom.
Sand dunes are not only made of sand
but also of water. You don't have to dig very far to see the moisture
in the sand. One of the unique features of sand is that it helps filter
water that passes through it. Go out to the sand and have the students
dig into the sand and describe what they find. Talk about why they think
it is cool and wet. Ask the students where they think the water came
from and where they think it goes. Doing Castles in the Sand prior to
this activity helps students understand how sand and water work together
through a process called capillary action. Raw water flows down wards
through the filter bed and as the suspended matter- which has usually
been treated by addition of a coagulant like alum- is retained on the
sand surface and between the sand grains immediately below the surface.
There is steady rise in the loss of head as the filter process continues
and the flow reduces once the Pressure sand filter drop across the
filter is excessive.

MORE NEWS