Waterco Zane Solar Vacuum relief valve
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Zane solar system parts - Vacuum relief valve
Waterco/Zane Vacuum Relief Valve with 20mm female thread
A vacuum relief valve prevents the absorber from continually ‘working’ due to the constant changes within the system from negative to positive pressure, extending the life of the system. By allowing water to drain from the system and have a longer service life, problems associated with freezing, boiling and stagnation are eliminated.