Your Main Water Shutoff: Where It Is and How to Close It

Where is the main water shutoff valve on a Florida house?

On most Tampa Bay houses it is outside, on the wall where the water line comes up out of the ground — usually in line with the meter box, low down and sometimes behind shrubs — and in some houses it is in the garage [2][4][5]. Utilities call it the house valve or the private shut-off valve.

Pinellas County Utilities says most residential properties have the house valve on the outside of the house, with some in the garage [2]. The county’s leak guide places it on an outside wall where the waterline enters the dwelling, or near the water heater [4]. The City of Tampa describes the same spot from the street: on the side of the home, in line with the meter box, low to the ground, sometimes behind bushes [5]. The meter itself is normally in the ground near the curb at the front of the lot [2].

That matches how houses here are built. Most sit on a concrete slab with no basement, so in our experience the service pipe runs underground from the meter and turns up beside the foundation before it goes into the wall. The valve is on that short riser — often with a hose tap on the same pipe — or, where the line was brought in through the garage, on the wall near the water heater. On older houses it can be buried in a planting bed, painted over or boxed in behind a panel.

The photograph at the top is one of ours in St. Petersburg: a 3/4-inch press-fit ball valve on the copper service line, right where it rises out of the ground at the house wall.

Which valves can shut off the water in my house?

Usually three that are yours and one that is not: the house valve closes everything, the water heater valve closes the supply to the heater, and small stops close one fixture at a time. The valve in the meter box belongs to the utility.

The Florida Building Code, Plumbing requires a full-open valve on the building water service pipe near the curb, on the water distribution supply pipe at the entrance into the structure, on the discharge side of every water meter, and on the water supply pipe to every water heater [1]. The code defines a full-open valve as one whose closure member does not restrict the flow when it is fully open [1] — in a house, a ball valve or a gate valve, not the small stop under a sink.

Smaller shutoff valves go on the supply to each plumbing fixture — except bathtubs and showers in residential occupancies — on the pipe to each outside hose tap, which the code calls a sillcock, and on the supply to each appliance [1]. All of them have to be accessible, and the service valve has to be identified [1]. That is what a new installation needs; an older house may be missing some, and the time to find out is before something leaks.

Can I turn off the water at the meter in Pinellas County or Tampa?

No. Pinellas County Utilities and the City of Tampa both say the valve at the meter is theirs and not for customers to turn — use your house valve instead [2][3][5].

Pinellas County Utilities’ FAQ says the utility prohibits the opening and closing of valves and tampering with the meter, and points owners to the house valve [2]. Its policy manual adds that the shut-off valve at the meter box is for the county’s exclusive use, that anyone who uses it assumes responsibility for repair or replacement if it is damaged, and that tampering with the county’s system may be a criminal offense or other violation of Florida law [3].

The City of Tampa says the same about its curb stop: it is City property, Tampa City Code Section 26-70 allows only an authorized representative of the City to turn the water off or on there, and damage from unauthorized use is billed to the account holder. If a property has no private shut-off valve, the City asks owners to call (813) 274-8811 to schedule a turn-off, and an emergency turn-off may carry a service fee [5].

Not every utility words it the same way. The City of St. Petersburg’s storm advice tells residents to use their private shut-off valve or turn the water off at the meter before evacuating [6]. On any other utility, ask it before you touch the meter box. Reading the meter is a different matter — Pinellas County’s own leak guide walks you through lifting the lid to read it [4].

How do I turn off the water to my house?

Close the house valve: give a lever handle a quarter turn until it sits across the pipe, or turn a round wheel handle clockwise until it stops. Then open a tap inside to make sure the water has stopped.

That is all there is to it when the valve is in good order. Most house valves on newer work are ball valves with a lever: in line with the pipe is open, across the pipe is closed. Older houses often have a gate valve with a round wheel, which takes several turns and is the type we most often find stuck.

Use the smallest valve that stops the problem. A dripping supply under one sink needs only that sink’s stop, and the rest of the house keeps its water. A leak inside a wall or a ceiling, or one you cannot trace, needs the house valve.

• Clear the plants or debris away from the valve so you can reach it [5]
• Lever handle: a quarter turn, until the handle is across the pipe
• Round wheel: clockwise until it stops — firmly, never forced
• Open a tap inside the house to confirm the water is off and let the pressure out
• Leak at one fixture: close its own stop instead and keep the rest of the house in water [1]

What if the main water valve won’t turn or won’t close all the way?

Do not force it. Close the nearest valve between the leak and the main if there is one; if the house valve is the only option, call your utility for a turn-off, and have the valve replaced.

A valve that has sat open for years can seize, and a wrench or a length of pipe on the handle is how a stem snaps or a packing nut starts to leak — a new leak, at the main, with the water still on. A valve that turns but still lets water through when it is closed has a worn seat or gate, and it needs replacing too.

If water is coming in and nothing on your side will stop it, call your utility rather than forcing its valve. In Tampa the City schedules turn-offs at (813) 274-8811 [5]; Pinellas County Utilities’ customer service is (727) 464-4000 [2][4].

Then replace the house valve. We install main shutoff valves on press-fit copper: a full-open ball valve with a lever, where it can be seen and reached.

Once in a while, when nothing is leaking, close the house valve and open it again. A valve that moves when it is tested is one that moves when it is needed.

How do I tell if a leak is in the house or in the yard line?

Use the meter and the house valve together. With no water running, close the house valve and watch the meter: if it still moves, the leak is between the meter and the house or in something connected outside; if it stops, the leak is inside [4].

This is Pinellas County Utilities’ own method. Its leak guide starts at the meter in the front yard: lift the meter-box lid, flip up the lens cap and find the flow indicator, a small red or black triangle. If nothing is using water and the indicator is moving, there may be a leak. For a slow leak it suggests writing down the reading, using no water for two hours and reading it again [4].

Then close the house valve and repeat. A meter that keeps moving points to the service line from the meter to the house, or to a water-using device connected outside the house; a meter that stops points inside [4]. If it keeps moving with the house valve closed and nothing outside running, one possibility — our reading, not the guide’s — is that the valve itself is no longer closing fully.

What if my house doesn’t have its own main shutoff valve?

Have one installed. The plumbing code requires a full-open valve at the entrance into the building [1], the City of Tampa recommends that every home has a private shut-off valve so the water can be shut off without delay in an emergency [5], and Pinellas County Utilities expects the owner to install and maintain a separate shut-off valve on their own side of the meter when the meter valve is replaced [3].

Without one, the only valve that stops the whole house is the utility’s — which, in Pinellas County and Tampa, is not yours to turn [2][3][5]. We install main shutoff valves on press-fit copper: a full-open ball valve on the service where it rises at the house wall, accessible and identified as the code requires [1], not behind a hedge or inside a finished wall.

Can a main water valve shut itself off when there’s a leak?

Yes. A motorised actuator clamped onto the main ball valve can close it by itself when its leak probe detects water [9], and we can fit one on a main ball valve.

The one on the Dunedin treatment system in our article on softener prefilters is a Zooz Titan. Its manual describes an automatic shut-off actuator for the main water valve whose included leak probe triggers the valve to close when a leak is detected, with or without a Z-Wave hub. It fits ½- to 1¼-inch ball valves only — not gate valves — needs at least 1.25 inches between the valve handle and the pipe, runs from a 12 V adapter plugged into a standard 120 V receptacle, and may be installed indoors or outdoors out of direct sunlight [9].

So the house valve has to be a ball valve with room around its handle and an outlet within reach. The probe goes where a leak would show first, such as beside the water heater. It does not replace a valve you can close by hand; it is there for the leak that starts when nobody is home.

Should I turn off my water before a hurricane or a long trip?

Before you evacuate, yes. The City of St. Petersburg advises shutting off the supply lines to appliances and using your private shut-off valve or turning the water off at the meter, to help prevent flooding if the house is damaged [6]. FEMA’s Ready.gov says that if there is damage to your home and you are instructed to do so, shut off water, gas and electricity before leaving [8].

In Pinellas County and Tampa that means the house valve, not the meter [2][3][5]. The same habit is worth keeping before any long trip: with the house valve closed, a failed supply hose or a cracked fitting can only release what is already in the pipes instead of running until someone comes home.

When you get back, open the house valve slowly and run a tap until the air is out. Anything teed off ahead of the valve, such as an outside tap, had water the whole time [4].

What this means in Clearwater, St. Petersburg and Tampa

Who owns what depends on your utility, and your water bill names it. The City of Clearwater says owners are responsible for the service line from the meter to the home [7], and Pinellas County Utilities says the same of everything on the customer side of the meter [3]. The meter valve is the utility’s; the house valve is yours everywhere.

On the houses we work on in Clearwater, St. Petersburg, Tampa and the rest of Tampa Bay, the trouble is rarely that the valve cannot be found on paper. It is hidden in landscaping, seized from years of not being turned, an old gate valve that no longer closes, or not there at all. Each of those ends the same way for us: a full-open ball valve on press-fit copper, at the wall, where anyone in the house can reach it — like the one in our photograph from St. Petersburg.

FAQ

Sources

We review and cite. We do not reproduce a paper or a manual — follow the links for the originals.

1. [1]Florida Building Code, Plumbing, 8th Edition (2023) — Chapter 6, Water Supply and Distribution — Florida Building Commission / International Code Council · 2023Law / code · §606.1 full-open valves near the curb, at the entrance into the structure, on the discharge side of every meter and on the supply to every water heater; §606.2 shutoff valves on fixture supplies (not tubs and showers in residential occupancies), sillcocks and appliances; §606.3 access to all valves; §606.4 service valves identified; Chapter 2 definition of full-open valve; read 2026-10-11
2. [2]Water FAQs — Pinellas County Utilities · 2026Government or standards body · shut-off valve on the meter unit; the utility prohibits opening and closing valves and tampering with the meter; most homes have a house valve outside, some in the garage; meter at the front of the property near the curb; read 2026-10-11
3. [3]Utilities Policy Manual (effective May 6, 2025) — Pinellas County Utilities · 2025Government or standards body · §2.4 owner maintains plumbing from the customer side of the meter; §2.6 tampering with the county system may be a criminal offense; §3.5 the meter-box shut-off valve is for the county’s exclusive use, users answer for damage, owner installs and maintains a separate valve on their side when the meter valve is replaced; read 2026-10-11
4. [4]Leak Detector Guide — Pinellas County Utilities · printed 12/06Government or standards body · meter in the front yard near the street or sidewalk; read the flow indicator with no water in use; two-hour reading test; house valve generally on an outside wall where the waterline enters, or near the water heater; close it to tell an inside leak from one in the service line or an outside device; read 2026-10-11
5. [5]Frequently Asked Questions — Water Department — City of TampaGovernment or standards body · “the valve in the water meter box won’t work”: private shut-off valve on the side of the home in line with the meter box, low to the ground; every home should have one; the curb stop is City property and City Code §26-70 bars anyone but an authorized City representative from operating it; damage billed to the account holder; read 2026-10-11
6. [6]Helene & Milton Recovery — Hurricane Center — City of St. PetersburgGovernment or standards body · “Turn Off Water Before You Evacuate”: shut off supply lines to appliances; if possible use your private shut-off valve or turn water off at the meter; meter typically near the sidewalk in front of the home; read 2026-10-11
7. [7]Public Information About Water Service Lines — City of ClearwaterGovernment or standards body · property owners are responsible for the service line from the water meter to the home; the city from the main to the property line or meter; read 2026-10-11
8. [8]Evacuation — Ready.gov — Federal Emergency Management Agency · 2026Government or standards body · if there is damage to your home and you are instructed to do so, shut off water, gas and electricity before leaving; page last updated 03/20/2026; read 2026-10-11
9. [9]Titan Water Valve Actuator ZAC36 LR — User Manual — Zooz · 2025Manufacturer's manual · automatic shut-off actuator for the main water valve; included leak probe closes the valve, hub optional; ½–1¼-inch ball valves only, not gate valves; 1.25-inch clearance between handle and pipe; 12 V DC adapter into a 120 V receptacle; indoor and outdoor, avoid direct sunlight; read 2026-10-11