Below Flow Flat (BFF)

The patented KISSS Below Flow Flat subsurface irrigation system works by pulsing water through the lateral lines for several minutes a few times a day at a very low pressure between 6 and 32 psi. The water running through the lines dispenses through the pressure compensating emitters, hits the dispersion tape and is taken up by the capillary fiber. Lateral percolation is reduced by the polypropylene backing that is exclusive to the Below Flow Flat. The soil absorbs the water from the capillary fiber at its own rate based on the soil's need for water.

Polypropylene dispersion layer: The tape on top of the product acts as a boundary between the soil and the emitter. It forces the water to flow into the capillary fiber before being absorbed into the soil. This eliminates water tunneling to the surface creating wet spots.
Capillary Fiber: Allows soil to take water from an infinite number of absorption points along the length of the fiber. The water races along the capillary fiber faster than in soil and then transfers into the soil by capillary action. The fiber also maintains perfect moisture uniformity along its length.
Pressure compensating drip tube: Delivers water to the geo-textile fiber at certain pressure ranges when system is operational.
Anti-percolation layer: Prevents downward percolation of water, minimizing water loss. The backing forces the water to move upward into the soil instead of immediately percolating downward, thus keeping the water in the root zone.