They are equipped with a stainless steel bristles coalescing media to catch the finest micro-bubbles and air without affecting the flow. The coalescence process produced by the media allows air and micro-bubbles to fusion and then be evacuated through the Calvent automatic vent.

The Cal-X-Tract air product line from Calefactio reduce the risk of corrosion and damage that could be caused by the oxygen and micro-bubbles in the systems of heating.

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The 1" Watts Series 009 Reduced Pressure Zone Assemblies are Watts "contractor grade" RPZ device. They were in production from 1989-1992. The original 1" 009 was replaced by the 009M2 in 1992. The 009 features a one cover design and is constructed of bronze and use check modules that slide into the body and are held in place with a retainer. The relief valve assembly slides down between the retainer and is directly under the cover. The check modules and relief valve assembly come apart for service. The original 009s parts do not interchange with the "M" models, so please be sure which model you have before ordering. No special tools are required for servicing 009 Series devices. Maintenance ManualSpecification Sheet

Calefactio automatic air vents remove trapped air to restore maximum pressure in a system. Made of brass, they can withstand temperatures as high as 120° C / 248° F (for solar air vents: 230° C / 446° F). These...

Their function allowing a better energetic performance while reducing the costly maintenance frequency. Their sturdy design allows to maintain their efficiency for whole duration of the system’s lifetime.