Swimming pool level control and fresh water feed - has concentric vertical columns with valve and pump controls

摘要

The level control and fresh water feed for swimming pools consists of a vertical column of two concentric tubes mounted on the pool expansion culvert. The upper part of the outer column is closed but has a number of ventilation openings. A fresh water inlet controlled by a magnetic valve is fitted to the outer column. Five level detector electrodes are fitted at intervals inside the central tube and operate via contactors, the magnetic valves and pumps according to the water level in the column. Protection against dry running of the pumps is also included.