Hydrophobic coating is applied to the housing wall in the areas of crevices, chinks, openings and capillaries to prevent moisture. It bonds with the glass to create a barrier against dirt, repelling dust, grease and liquid. The coating is non-acidic. It allows glass to be cleaned with a wiping cloth without cleaning solution. It is a durable water repellant coating that repels water and salt spray. Hydrophobic coating makes water and liquids bead up on the surface.

Hydrophobic foams are rendered hydrophilic by means of treatment with sorbitan monolaurate. These foams can be prepared or treated with sorbitan monolaurate and thereafter dried to leave a substantially uniformly distributed residue of sorbitan monolaurate on the internal foam surfaces. The resulting treated foams are rendered hydrophilic and are thus suitable for use in absorbent devices, including diapers, sanitary napkins and bandages.

Hydroponics Bags are a consumer product, which is used in green houses for hydroponics growers.

Hydroponic gardening is a method of growing plants, without soil, by providing food and water directly to the roots of the plant. It increases yields, conserves water, reduces pest problems, and provides precise control over plant nutrition. It eliminates the need for the root system to expand looking for food and water, so the energy normally used by the plant to search for food is used for faster upward growth and fruit production.

Hydrostatic Drive Systems have a demand-responsive pump and hydraulic circuit. It has a demand-responsive pump and at least one hydraulic circuit. The pressure-maintaining valve can be controlled by a differential signal formed from a load pressure signal and a delivery pressure signal. The load pressure signal to the pressure-maintaining valve can be changed by the output signal of a pressure-reducing valve. The pressure-maintaining valve can be pressurized with the output-side pressure of the pressure-reducing valve that is located in a load pressure line. The output pressure of the pressure-reducing valve can be adjusted by a spring and a variable control pressure.