Valve Leaking: Outside Spigot Leaks With the Shutoff Valve Closed

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   Move people and tools away from the wet area. Close the outside spigot handle, then close the dedicated indoor shutoff for that faucet if you can identify it; if the leak is substantial, the branch valve will not close, or the dedicated valve is unknown, close the home's main water shutoff from a dry, accessible position. Do not stand in water to operate a valve or touch wet electrical equipment.

   Expected result: The flow stops immediately, slows to a short drain, continues as a drip or stream, or water continues after the main valve is closed.

   Next step: Keep the valve closed and use a container or towels to limit damage. If water continues after the main is closed, the valve cannot isolate the line, or the area is unsafe, stop and arrange a qualified plumber rather than opening fittings.

   Why this matters

   Why: Immediate stopping or a short drain suggests the accessible valve isolated the line and trapped water is leaving. Continued flow means the wrong valve may have been closed, the shutoff may be passing water, or there is another supply path; flow after the main is closed raises concern for a concealed or separate source.

2. Check 2

   With the branch shutoff closed and the spigot pointed into a bucket, open the outside handle slowly for a moment to release only stored line pressure, then close it again. Do this only where the outlet and ground are safe; do not remove a cap or hose fitting under pressure and do not force a stiff handle.

   Expected result: A brief flow stops, the spigot continues dripping after the line has drained, the flow increases when the handle is opened, or no water comes out at all.

   Next step: Record how long the leak lasts and where it exits. If it continues after the line is drained, leave the branch off and proceed to visual source identification; do not dismantle the valve.

   Why this matters

   Why: A brief flow is consistent with residual water. Continued dripping after pressure release is not explained by residual pressure alone and keeps a passing shutoff, stem washer, seat, packing seal, vacuum breaker, or pipe leak in question. No flow can mean the valve worked, the wrong valve was closed, or the spigot is blocked.

3. Check 3

   Remove any garden hose, Y-splitter, timer, or self-closing nozzle from the spigot only after water is isolated and pressure has been relieved. Dry the outlet, stem/packing-nut area, anti-siphon or vacuum-breaker openings, wall connection, and hose threads with separate towels, then watch for the first area that becomes wet.

   Expected result: Water reappears at the outlet, around the stem or packing nut, from a vacuum-breaker opening, at the hose thread, or where the faucet enters the wall.

   Next step: Use the location to choose the service path. Keep the branch shutoff closed for a continuing leak; do not keep tightening the handle, remove the bonnet, or substitute tape for a failed seat or pipe.

   Why this matters

   Why: Outlet leakage with the handle off is consistent with a worn washer or damaged seat. Stem-area leakage is a packing or bonnet path; vacuum-breaker leakage is its own seal/check assembly path. Wall-side moisture can be a fitting, freeze, or concealed pipe problem. A hose gasket or splitter can also mimic a faucet leak.

4. Check 4

   Identify whether the outside fixture is a standard hose bib, frost-free wall hydrant, or anti-siphon/vacuum-breaker type from its visible shape and the exact installation manual if available. Check only that a hose has been removed and that the faucet points downward; do not infer the internal stem length, seat, or repair kit from appearance alone.

   Expected result: The faucet has a long wall body or frost-free design, a visible anti-siphon/vacuum-breaker cap or vent, a standard short body, or signs of freezing such as a split body or wall-side dampness.

   Next step: Keep the water isolated and use the exact manufacturer's documentation for identification. If there is a crack, wall-side moisture, or a frozen-pipe history, arrange plumbing service; do not remove a frost-free stem while pressurized.

   Why this matters

   Why: Frost-free hydrants are intended to drain when installed correctly and not left under pressure with a hose attached. Anti-siphon components can leak from their own seals. A freeze-damaged faucet or wall pipe can leak only when supply is restored and may require replacement rather than a washer.

5. Check 5

   Confirm that the indoor shutoff you closed actually feeds this outside spigot. From a dry location, briefly open the spigot after the valve is closed and observe whether flow stops after residual water drains. If a water meter has a visible flow indicator, turn off all fixtures and compare the indicator before and after isolation; do not open the meter or disturb utility equipment.

   Expected result: The spigot drains and the meter is still, the spigot keeps flowing and the meter moves, the meter is still but the spigot drips, or the shutoff handle will not turn or will not hold.

   Next step: Do not repeatedly cycle a stuck or leaking shutoff. Keep the main or branch closed as needed and arrange a plumber to verify isolation and repair the shutoff or spigot.

   Why this matters

   Why: A still meter and a short drain support successful isolation. Meter movement means water is still being supplied somewhere, possibly through a passing shutoff or another fixture. A drip with no meter movement may be stored water, a very small leak, or a separate downstream pocket. A valve that will not hold is itself a service issue.

6. Check 6

   Inspect the accessible wall, basement, crawlspace, or exterior siding around the spigot without removing finishes or entering standing water. Look for fresh dampness, staining, bulging, mineral deposits, frost damage, or a sound of running water behind the wall. If the home's meter is moving with all fixtures off, note that result without opening a utility box.

   Expected result: The wall or crawlspace is wet, the faucet body is cracked, water appears only when the main is open, the meter moves despite all fixtures being off, or all visible areas are dry while the outlet drips.

   Next step: Close the main or affected branch and arrange a qualified plumber for hidden, freeze-related, or meter-confirmed leaks. Protect flooring and finishes from water; do not cut into the wall or use heat or flame to locate a leak.

   Why this matters

   Why: Wall-side moisture, a cracked body, or unexplained meter movement points to a concealed supply or fixture leak. A dry wall with outlet dripping keeps the spigot's internal washer or seat more likely, but does not justify internal repair without the correct shutoff and fixture identification.