For a Haymarket plumbing emergency, close the main water valve, and if you smell gas, leave the house and call 911 and Columbia Gas of Virginia at 1-800-544-5606 from outside. Then call the number on this page to be connected with a local plumber in Haymarket.

Who do I call if I smell gas in Haymarket?
The Town of Haymarket lists Columbia Gas of Virginia as its gas utility, not Washington Gas. If you notice a gas odor, leave the house right away without flipping switches or using the garage door opener. From outside, call 911 and Columbia Gas at 1-800-544-5606, the same number the town lists for leaks. Once the utility has made the line safe, a plumber can repair house piping or reconnect an appliance. Homes in the wider 20169 area should check their own gas bill, and propane homes call 911 and their propane supplier.
Who handles a water main break or a sewer overflow?
The town lists Prince William Water for water and sewer. Its emergency dispatch line, (703) 335-7990, answers at any hour for main breaks and outages; customer service is (703) 335-7950 on weekdays. Western-county customers are typically on Prince William Water's West System, which blends Potomac River water treated by Fairfax Water with Lake Manassas water treated by the City of Manassas. A leak inside the house, a failed water heater or a backup that only affects your home is a job for a plumber. Outside town limits, the 20169 postal area covers large unincorporated areas where service can vary by address, so check your bill.
Can a damaged water heater be replaced tonight?
Sometimes, but expect a permit step. All building permits in town, including plumbing and mechanical, are issued by Prince William County, and applicants first need zoning approval from the Town of Haymarket. Haymarket's median home was built in 1997, so many water heaters, valves and supply lines have been in service for a long time. Common late-night problems include:
- A water heater leaking from the tank or its connections
- A burst washer hose or a cracked supply line under a sink
- A sump pump that quits in a heavy storm
- A pipe in an exterior wall that splits in a hard freeze
If the tank is leaking, close the cold supply valve and turn off the gas or power to the heater before help arrives.
A short local note
Haymarket's historic core sits at the foot of the Bull Run Mountains, with newer neighborhoods spreading along I-66, Route 15 and Route 55. Night and weekend calls usually cost more than weekday visits, and arrival depends on the hour, so none is promised.
Emergency Plumber questions in Haymarket
I smell gas near the furnace or water heater. What should I do?
Water is gushing from the street or the meter box. Who handles that?
Does an emergency water heater replacement need a permit?
We are leaving for a winter trip. How do we avoid coming home to a flood?
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