Where Is My Main Water Shut-Off Valve? A Florida Homeowner's Guide

In a South Florida single-family home, the main shut-off is most often on the exterior wall at the front of the house, close to the hose bib and roughly in line with the water meter at the street. It may be a round handle or a lever, and it may be behind a shrub that has been growing over it for years.

The second location is the meter box itself, usually a rectangular covered box at the property line near the pavement. The valve on the house side of the meter is the one you want. The utility's own valve is also in there; it is often not designed for a homeowner to operate and may need a key.

In a condominium or an apartment, there is normally a unit shut-off inside the unit — most often in the water heater closet, sometimes behind an access panel in a ceiling or a wall near the plumbing wall. Building-level shut-offs are the association's and are not usually something an owner should operate.

In a townhouse or villa, it varies. It may be exterior like a single-family home, or in a shared utility area. Find out which before you need to know.

1. Open a tap inside the house and leave it running.
2. Close the main valve. Round handle: clockwise. Lever: a quarter turn so the handle sits across the pipe rather than along it.
3. The running tap should stop within a few seconds. If it slows to a dribble but never stops, the valve is not seating properly.
4. Open the valve again slowly, and let the tap run clear before closing it.

A valve that has never been operated in twenty years may not close, and finding that out during a burst pipe is the worst possible time. If it will not close cleanly, it needs replacing — and that is a scheduled job, not an emergency one.

• Clear whatever has grown over it. That shrub costs minutes at the worst possible moment.
• Photograph it, in context, and keep the photo somewhere everyone in the household can reach.
• Show every adult in the property where it is and which way it turns. In a rental, tell the tenant.
• If it needs a meter key, buy one and keep it somewhere obvious, not in a drawer in the garage.
• Mark it. A cable tie in a bright color on a stake next to it works fine and survives the weather here.

• Angle stops under every sink and behind every toilet. These isolate one fixture, which is often all you need and far less disruptive than killing the whole house.
• The cold inlet valve on top of the water heater. This stops the tank refilling, which is the first move on almost any water heater failure.
• The irrigation system valve. Closing this is also the fastest way to confirm whether a mysterious water bill belongs to the irrigation or to the house.
• The pool autofill valve, for the same reason.

1. Open the lowest tap in the house to drain the pressure out of the system. That stops residual water continuing to leave the failure.
2. Switch off the water heater at the breaker or the gas control, so it is not heating an empty or draining tank.
3. Kill power at the panel to any area where water is near outlets or fixtures.
4. Photograph the damage before touching anything.
5. Then call. With the water off and the pressure drained, the situation is stable and the visit is about repair rather than damage control.