Apparatus and instruments for use in the purification, separation and sterilization of liquids and gases used in the biotechnology, pharmaceutical, medical, biopharmaceutical and food and beverage industries; Folding portable charcoal, propane and gas fired barbecues, stoves, and grills; Gas regulators; Heating apparatus for solid, liquid or gaseous fuels; Heating systems for residential and commercial buildings comprised of biomass burners, boilers, valves, pipes, manifolds, solar panels, co...