LOW HEAD

Generates useful pressures to 10 ft of water pressure (4-5 psi).

A low head pump may not be very effective in backwashing certain sand type filters (Predators and some others) which require higher pressures and flows for backwash cycle.

Use a medium head pump when pumping to a waterfall more than 10 feet above the ponds' surface. You can also use a low head pump when pumping through low head filters (Aquadyne, mat filters, large open type filters, etc.).

Most efficient type

MEDIUM HEAD

Generates useful pressures to 30-35 ft of water pressure (12-15 psi).

If pump is medium head, while effective in backwash cycle, it may not be energy efficient during majority of use.

Use a medium head pump when you must pump to higher elevations, pump the water through sand filters or other filters which require high pressure.

Least efficient, most power

TWO SPEED

Operates as both low head and medium head pumps. When higher flow and pressure is required, as for filter backwash, the pump is switched into a higher speed.

When such pressure is not required, the pump is switched back to the lower speed to benefit from it's greater energy efficiency. Superfalls 2 speed pumps deliver maximum efficiency during low speed operation, and maximum power at high speed.

The 1 hp 10-8KMH2S operates with the same flow/pressure characteristics as the single speed 1 hp medium head version when at high speed, and theenergy efficient10-4000LH when at low speed.

The Best of Both Worlds!