How Much Water Can a Burst Pipe Release per Minute?

A 1/2-inch pipe at 60 psi can release roughly 5 to 10 gallons per minute from a full break. A 3/4-inch line may push 10 to 20 gallons per minute, and a 1-inch main can exceed 30 gallons per minute. These are broad estimates, and the actual rate depends on the break's shape and the water pressure.

To put that in perspective, a typical bathtub holds about 40 gallons. A 1/2-inch burst could fill it in four to eight minutes, while a 1-inch burst might fill it in just over a minute. A 2-inch line, often found in older homes or commercial buildings, can release over 100 gallons per minute, which can flood a large area quickly.

• 1/2-inch pipe: 5 to 10 gallons per minute
• 3/4-inch pipe: 10 to 20 gallons per minute
• 1-inch pipe: 30 gallons per minute or more
• 2-inch pipe: 100 gallons per minute possible
• Actual rate depends on pressure and break shape

After shutting off the water, move valuables and furniture away from the flooded area. Turn off electricity to any rooms with standing water to avoid shock risk. See a doctor if anyone feels unwell from mold or dampness, but the first priority is drying out the space to prevent secondary damage.

The pros can extract standing water and dry the structure, but timing matters. The longer moisture sits, the more damage it does to drywall, flooring, and framing. You can start with towels and a wet vacuum, but for large volumes, professional equipment is often needed to dry wall cavities and subfloors.

• Shut off the main water valve first
• Move furniture and electronics to dry areas
• Turn off electricity in flooded zones
• Use towels or a wet vacuum for small puddles
• Call local water damage pros for large flooding