Emergency Guide: What to Do When a Pipe Bursts | Rhino Restoration

A burst pipe is one of the most frightening water emergencies a San Antonio homeowner can experience. A single broken half-inch supply line can release more than 50 gallons per minute into your home — enough to flood a 1,500 square-foot house in minutes. In winter months, even a brief freeze can be enough to split copper or CPVC supply lines that have never given trouble before. In summer, aging pipes can fail from pressure spikes or corrosion. Knowing exactly what to do in the first minutes after a pipe bursts can make the difference between a manageable cleanup and a complete interior reconstruction.

The actions you take — or fail to take — in the first 30 minutes are the most consequential. Water quickly wicks into drywall, saturates insulation, and begins migrating under flooring. Mold colonization can begin within 24 to 48 hours of water exposure, making speed essential.

Step 1: Shut Off the Main Water Supply Immediately

Every homeowner should locate their main water shutoff valve before an emergency occurs. In most San Antonio homes, the main shutoff is near the water meter — typically near the street, in a utility box, or on an exterior wall. Turn the valve clockwise (righty-tighty) until it stops. If the shutoff valve itself is damaged or stuck, call San Antonio Water System (SAWS) at 210-704-SAWS to shut off service at the meter. Do not attempt to reopen the supply until the damaged pipe has been repaired by a licensed plumber.

Step 2: Turn Off Electricity to Affected Areas

Water and electricity are an immediately life-threatening combination. If water has reached any area of the home where electrical outlets, appliances, or panel components are present, shut off power to those circuits at the breaker box. If the breaker box itself has been exposed to water, do not touch it — call CPS Energy at 210-353-2222 and request emergency disconnection at the meter. Do not step into standing water in any area where electrical current may be present.

Step 3: Document All Damage Thoroughly

Before moving any furniture or personal property, photograph and video every affected area from multiple angles. Capture the source of the burst, all visible water paths, saturated materials, and any property that has been damaged. This documentation is critical for your homeowner's insurance claim. Insurance adjusters rely on this initial documentation to establish the scope of loss — items that are moved or discarded before documentation may not be covered. Walk through every room systematically and capture as much detail as possible.

Step 4: Remove Standing Water and Protect Your Property

If you have a wet-dry shop vacuum, use it to remove as much standing water as possible from hard floors before professional extraction teams arrive. Move furniture and personal items off wet flooring to prevent further saturation. Place aluminum foil or wood blocks under furniture legs to prevent staining. Open windows if outdoor humidity is lower than indoor humidity to promote air circulation. Do not use a household fan to dry wet drywall or carpet — this can spread mold spores if any colonization has begun.

Step 5: Call a Plumber and a Restoration Company Simultaneously

You need two separate professionals responding simultaneously — a licensed plumber to repair the pipe and stop the source, and a water damage restoration company to begin extraction and drying immediately. At Rhino Restoration, we coordinate regularly with plumbers throughout San Antonio and can recommend a licensed plumber if needed. Our team arrives with truck-mounted extraction units, thermal imaging cameras to map all moisture paths, and industrial drying equipment that we deploy immediately upon arrival.

What NOT to Do After a Pipe Bursts

Avoid these common mistakes that make the situation worse: Do not use a household hairdryer to dry walls or floors — it moves air at the surface but does nothing about moisture inside wall cavities. Do not wait to call a restoration company — every hour of delay allows moisture to penetrate further. Do not assume flooring is dry because the surface feels dry — moisture meters regularly detect saturation levels up to two inches below surfaces that feel dry to the touch. Do not throw away any damaged property before an insurance adjuster or restoration professional has documented it.

Time is the most important variable in any water damage event. The faster professional extraction and drying begins, the lower the total cost and the lower the risk of mold. Call Rhino Restoration at 210-405-6886 any time of day or night — our 24/7 emergency team dispatches within 60 minutes to all San Antonio and Bexar County locations.