AUTOMATIC AIR MICRO-BUBBLE SEPARATOR FOR USE WITH HEATING AND COOLING SYSTEMS

RIGID METAL TUBING FOR VENTILATION AND AIR CONDITIONING SYSTEMS; RIGID METAL COUPLINGS FOR SUCH TUBING; RIGID METAL FITTINGS SUCH AS GRILLS AND VENTS FOR VENTILATING AND AIR CONDITIONING SYSTEMS

De-aerators and de-aerators for pipework containing liquids for use in industrial installations; de-aerators and de-aerators for pipework containing liquids for use in heating, central heating, refrigerating, drying and heat recovery installations and apparatus