I would like to ask what causes the water level in the fire tank to drop without any apparent reason
Thread Content
Our company has a fire water tank with a total capacity of 1,500 cubic meters and a depth of about 3 meters. Recently, it was noticed that the water level drops significantly after the pool is filled with water. Generally, 50 centimeters can be reduced in 10 days. The walls of the pool are cast in place, and upon inspection, there are no visible cracks or signs of leakage in the walls. Help, what could be the reasons for the water level in the pool to drop? How should it be solved?
1. Is there any unauthorized use? Is someone taking water from the fire pond? Rule this out first. 2. Is there any internal leakage from the pipe valves, causing fluid to leak out? Are the fire-fighting water and production water shared through the same pipeline?
50 centimeters in 10 days? Release the pressure, empty the water level, and check again. What you’re experiencing is likely a leak; if there’s no leakage at all, then check the fire protection pipelines to see if the valves are closed. The water used in the company comes from the fire emergency pool. If the first possibility isn’t applicable, it’s the second one – someone is using the water from the fire emergency pool. Evaporation is not possible, as the water in such pools is kept sealed and insulated, so evaporation is minimal. It’s usually an internal leak; check the connection pipes of the fire emergency pool to see if there are any leaks, and also verify whether the water from the pool is being used as domestic water. Additionally, make sure no one is using the water from the emergency pool instead of the underground fire protection water.
I agree with the two people above; please check more by yourself! First, rule out the possibility that someone has used it up. In general, for fire suppression systems, especially those with a secondary water supply system like yours that includes tanks, the fire protection pipelines should be separate and not connected to other systems; if they are connected, that should be a key point of suspicion ； Second, check the pipes and tanks of the fire suppression system; such systems usually have pressure stabilizing pumps. If the pump starts operating on its own frequently, it’s definitely because there is a leak in the underground piping network ； A pool is also a possibility; just because there are no leaks around it doesn’t mean there are no leaks at the bottom. You’re well aware of the quality of construction these days – anything is possible!
The most likely possibility is a leak in the underground fire pipes
The inspection must not have been thorough enough; is the operation of the fire suppression pressure pump the same as usual? Is there any leakage at the bottom of the pool?
1. Unauthorized use; 2. Prolonged use, resulting in cracks and leaks in the bottom part due to concrete curing; 3. The water inlet pipe is at a lower level than the reservoir, there are other water usage points alongside the refill pipe, and the level of those usage points is below the reservoir level, or the refill pipe develops holes or other issues that cause leakage
What the people above said makes sense. Other reasons: for example, 1500 cubic meters with a depth of 3 meters, which means an area of 500 square meters; it’s an open area, and with high temperatures in summer, what is the rate of evaporation?
It seems there’s a leak; I’ll check it
Thank you all for the replies! It seems that a leak at the bottom of the pool or a defect in the underground fire hoses is the more likely possibility. Now close the valves of the pipelines that connect all the root pools, and observe for a while.