When installing outdoor aboveground fire hydrants, the top height of the fire hydrant is .64m from the ground, the riser should be vertical and stable, and the distance between the control valve well and the fire hydrant should not exceed 2.5m The bottom of the fire hydrant elbow should be provided with piers or supports.
outdoor underground fire hydrants should be installed in fire hydrant wells, which are generally built with MU7.5 red bricks and M7.5 cement mortar. The inner diameter of fire hydrant shaft should not be less than 1m. A ladder should be set in the well to facilitate the maintenance of the valve.
the lower part of the tee joint or elbow connected between the hydrant and the main pipe should be provided with a base, and concrete piers, piers and tees should be set when the base is seated, and the bottom of the elbow should be plastered with M7.5 cement mortar to form a splayed bracket.
Extended information
The layout of outdoor hydrant water supply pipeline shall meet the following requirements:
1. The diameter of outdoor hydrant water supply pipeline shall be determined by calculation and comparison according to the design water consumption of outdoor hydrant and the economic flow rate of the pipeline;
2. The outdoor fire water supply network should be arranged as a ring network, but it can be arranged as a branch network at the initial stage of construction or when the outdoor fire water consumption does not exceed 2L/s;
3. The application valve of fire water supply network is divided into several independent sections, and the number of fire hydrants in each section should not exceed 5;
4. The outdoor hydrant water supply pipeline should be determined according to the water supply of the system, and should not be less than DN1.
Reference: Baidu Encyclopedia-Outdoor Fire Hydrants