Published by All Systems Pros · Updated October 12, 2026
Stop the Water at the Main Shutoff Valve
The most critical step during a burst pipe is stopping the flow of water. Locate your home's main water shutoff valve and turn it off immediately to prevent further flooding and property damage.
A burst pipe can release hundreds of gallons of water into your home in a matter of minutes. Your immediate priority is to halt this flow. If you can safely reach it without stepping into flooded areas, locate your main domestic water shutoff valve. In many Southern California homes, this valve is located outside near the front perimeter of the house, often attached to an exterior stucco wall, or near the street-level water meter. It may also be found inside a garage.
There are generally two types of valves you might encounter. A ball valve has a straight handle; to shut off the water, turn this handle so it is perpendicular to the pipe. A gate valve has a round, wheel-like handle; turn this clockwise until it stops completely. If the burst pipe is isolated to a specific fixture, such as a toilet or a sink, you may be able to use the localized angle stop valve located on the wall directly behind or beneath that fixture. However, if you cannot quickly find the local valve or if the leak is inside a wall or ceiling, go straight to the main house shutoff. Do not attempt to block the water with your hands, towels, or buckets while the water is still actively flowing under municipal pressure, as this is ineffective and wastes valuable time.
Recognize Electrical and Contamination Hazards
Never enter standing water if there is any risk of electrical current, and do not open energized electrical panels. If water is near outlets or appliances, evacuate the area and wait for professional help.
Water and electricity are a deadly combination. When a pipe bursts, water can quickly travel through wall cavities, across ceilings, and across floors, easily reaching electrical outlets, light fixtures, and energized appliances. If the flooding has reached any electrical components, or if you see sparking or smell burning, do not walk through the water to reach the shutoff valve. Leave the area immediately. Under no circumstances should you attempt to open an energized electrical panel to turn off breakers if the floor around the panel is wet or if your hands are wet. Wait for a qualified professional or your local utility provider to secure the power.
Additionally, be aware of structural hazards. If a pipe has burst in a second-story floor or attic, water will pool on the ceiling below. Wet drywall becomes extremely heavy and can collapse without warning. Stay out from under sagging ceilings. Finally, if the burst pipe involves a sewer line or if the water appears discolored and foul-smelling, treat it as contaminated. Do not expose your skin to sewage backup, and keep children and pets far away from the affected area.
Avoid DIY Pipe Repairs and Hazardous Cleanup
Do not attempt to patch a pressurized burst pipe yourself or use chemical cleaners to clear related backups. Temporary fixes often fail under pressure, leading to worse flooding and potential injury.
Home plumbing systems operate under significant pressure, typically between forty and eighty pounds per square inch. Because of this pressure, temporary DIY fixes like wrapping the pipe in duct tape, applying plumbing putty, or using rubber clamps are highly unreliable for a full burst pipe. These makeshift patches can suddenly blow off, causing a secondary surge of water that can catch you off guard and cause further damage. Furthermore, if the burst is related to a severe drain blockage, never pour chemical drain cleaners into the system. Chemical cleaners can cause severe chemical burns and splash injuries. If the pipe is already broken, these toxic chemicals will simply spill out into your home's wall cavities or floors, creating a hazardous materials situation that complicates the cleanup and repair process.
If a burst pipe has sprayed water onto a gas appliance, such as a water heater or furnace, do not attempt to inspect the gas connections, shut off the gas valves, or restart the appliance yourself. If you suspect a natural gas leak due to the damage, leave the premises immediately and call your gas provider from a safe location.
Document the Damage and Protect Valuables
Once the water is safely shut off and hazards are cleared, document the flooded areas with photos for your insurance company. Move dry valuables away from the water's path to prevent further loss.
After the main water supply is secured and you are certain there are no electrical or structural hazards in the immediate vicinity, your next step is damage mitigation and documentation. Before you begin moving items or attempting to dry the area, take clear photographs and videos of the standing water, the damaged pipe if it is visible, and all affected property. This documentation is often required by homeowners insurance companies when processing a water damage claim.
Once you have captured the necessary evidence, begin moving dry, movable valuables away from the affected zone. Relocate small furniture, rugs, electronics, and important documents to a dry room or garage. Do not use standard household vacuum cleaners to remove standing water, as this poses a severe shock hazard and will destroy the vacuum. If you have a specialized wet-dry shop vacuum and the area is safe from electrical risks, you may use it to extract small puddles. However, for significant flooding, you will need professional water damage restoration equipment to properly dry the structure and prevent mold growth.
Calling an Emergency Plumber for Permanent Repairs
A licensed plumber will locate the exact source of the burst, remove the damaged section, and install new piping that meets current building codes. Professional repair ensures the system can safely handle normal water pressure.
Repairing a burst pipe requires professional tools, materials, and expertise to ensure the integrity of your home's plumbing system. When you contact All Systems Pros for an emergency plumbing situation, our priority is to safely and effectively resolve the crisis. Our technicians will arrive, verify that the water is completely shut off, and assess the extent of the pipe damage. We will carefully open the wall or ceiling if necessary to expose the compromised section of piping.
The damaged segment is then cut out and replaced with high-quality materials, whether your home uses copper, PEX, or galvanized steel piping. We ensure that all connections are properly soldered, crimped, or threaded to withstand municipal water pressure and comply with local building codes. Once the repair is complete, we slowly restore the water supply and perform a thorough pressure test to confirm there are no secondary leaks in the system. We provide emergency plumbing services to homeowners across Pasadena, Monrovia, Arcadia, Glendale, Burbank, and the surrounding communities. If you are experiencing a burst pipe, secure your water if it is safe to do so, and contact us immediately for professional assistance.
Sources and further reading
About All Systems Pros
All Systems Pros is a plumbing service company based in Monrovia, CA. The company lists Rheem ProPartner, A. O. Smith Certified Contractor, and Raypak credentials. These general guides help explain plumbing topics; equipment instructions and project requirements must be checked for the specific property.
