Fire protection system with improved frost protection

Abstract

A fire protection system (1) using a sprinkler network (4) comprising: - sprinkler pipes (3) configured to carry fluid from a tank (2) configured to store a predefined volume of fluid to the sprinkler network (4), the sprinkler pipes (3) and the tank (2) forming a closed fluid circuit; and - a maintenance device (5) connected to the closed fluid circuit, the maintenance device (5) comprising an inlet pipe (11) configured to be mounted on the tank (2) so as to draw fluid and an outlet pipe (12) configured to be connected to the tank, near a peak of the tank (2), so as to inject the fluid drawn by the inlet pipe (11) into the tank (2). Figure for the abstract: Fig. 1