Outdoor Faucet Not Working: Hose Bib Repair Guide

Common Symptoms

• No water from the outdoor faucet handle when turned on
• Water pressure is very low compared to previous seasons
• Faucet drips from the spout when the handle is fully closed
• Stem leaks — water weeps from around the handle shaft when the faucet is on
• Vacuum breaker cap (on top of the spigot body) is leaking or hissing
• Faucet worked in fall but produces no water when turned on in spring
• Visible crack in the faucet body or supply pipe near the wall
• Water runs after turning the handle off and then slowly stops

Most Likely Causes

1. 1

   Freeze Damage — Cracked Supply Pipe or Burst Spigot Body

   When outdoor temperatures drop below 28°F for 4+ hours, any water trapped in a standard hose bib's supply pipe or in a frost-free sillcock with a connected hose will freeze. Ice expands approximately 9% by volume, generating 40,000+ PSI of internal pressure — enough to split copper tubing or crack the cast brass spigot body. Freeze damage in a standard hose bib typically occurs in the supply pipe immediately behind the exterior wall. Frost-free sillcock damage typically occurs in the middle of the standpipe (the long stem portion). Signs of freeze damage: in spring the faucet produces no water even with the indoor supply shutoff fully open, or there is unexplained dampness or water staining inside the wall or ceiling near the faucet location. Confirm by shutting the indoor supply valve, then slowly opening the outdoor faucet — if water continues flowing (draining from a cracked pipe), the supply line is compromised.

2. 2

   Worn Seat Washer — Dripping Spout

   Standard hose bibs use a compression valve mechanism: a rubber seat washer at the end of the valve stem presses against a brass valve seat when the handle is turned clockwise. Over time (typically 5–15 years), the rubber washer hardens, flattens, or tears, allowing water to drip past the seat when the faucet is closed. The repair is simple: shut off the indoor supply valve, remove the packing nut (the large hex fitting just behind the handle), pull out the stem assembly, and replace the flat rubber washer held by a brass screw at the stem tip. Seat washers are sold by size (5/8-inch, 3/4-inch) and are available in assortment packs for under $5. If the brass valve seat itself is eroded (rough, pitted), use a seat wrench to replace it or grind it smooth with a seat dresser.

3. 3

   Leaking Packing Nut — Stem Leak

   A stem leak — water weeping from around the handle shaft while the faucet is running — indicates that the packing material around the stem has compressed or worn out. Traditional hose bibs use graphite rope packing or a rubber O-ring around the stem, compressed by the packing nut. Repair: tighten the packing nut 1/8 to 1/4 turn clockwise while the faucet is slightly open (water flowing prevents the stem from turning). If tightening doesn't stop the leak, shut the supply valve, remove the stem, and wrap new graphite packing (Teflon cord packing) around the stem or replace the O-ring. New packing string costs under $5.

4. 4

   Vacuum Breaker Failure — Anti-Siphon Device Leak or Flow Restriction

   Most modern hose bibs and frost-free sillcocks have an integral vacuum breaker (anti-siphon device) on top of the spigot body — a small cap with a spring-loaded check valve that prevents garden hose water from being siphoned back into the potable supply when the faucet closes. When the rubber seat or spring inside the vacuum breaker wears out, it either leaks (sprays water out the side when the faucet is on) or sticks closed (restricts flow). A failed vacuum breaker is the most common cause of reduced outdoor faucet pressure when the indoor supply pressure is normal. Replacement vacuum breaker caps are inexpensive ($5–$10) and thread onto the spigot outlet — no tools required in most cases, just unthread the old cap and thread on the new one.

5. 5

   Indoor Supply Shutoff Closed or Partially Closed

   Many homes have a dedicated indoor shutoff valve for each outdoor faucet, located inside the wall or in the basement/crawl space directly behind the hose bib. These valves are sometimes closed for winter and forgotten, or may not be fully reopened after maintenance. If the outdoor faucet produces very low pressure or no water at all, locate the indoor shutoff — typically a 1/2-inch angle stop or ball valve on the cold supply line near the exterior wall — and confirm it is fully open. Gate valves (older type, multi-turn) can also become partially obstructed by internal corrosion or loose stem packing that reduces flow without completely blocking it.

6. 6

   Frost-Free Sillcock Standpipe Failure

   Frost-free (anti-siphon) sillcocks have a long 6–12 inch brass standpipe that extends into the wall, with the valve seat at the rear (warm) end. The standpipe and stem assembly can fail in several ways: the stem O-rings wear and cause stem leaks, the rear valve seat wears and causes a dripping spout that only stops after a delay (the standpipe draining), or the entire unit is physically damaged from a hard freeze if a hose was left connected. Complete replacement of a frost-free sillcock requires cutting and sweating (soldering) or pressing a new supply connection unless the existing unit uses union or push-fit fittings.

Quick DIY Checks

1. 1Step 1 — locate and check the indoor supply shutoff: find the dedicated shutoff for this outdoor faucet, typically in the basement or crawl space on the cold supply line near the exterior wall where the faucet is mounted. It may also be in a utility room or under a nearby sink. Confirm it is fully open (ball valve: handle inline with pipe; gate valve: counterclockwise until it stops). If you can't find a dedicated shutoff, the main water shutoff controls it. Turn the outdoor faucet handle on while checking — if water flows when you open the shutoff all the way but was restricted before, the shutoff was the problem.
2. 2Step 2 — inspect for freeze damage before turning on in spring: before opening the indoor supply shutoff for the first time after winter, open the outdoor faucet handle fully (output side open). Then slowly open the indoor supply valve just 1/4 turn. If you hear a normal rush of water exiting the outdoor spout, no freeze damage occurred — gradually open fully. If water doesn't exit the spout but you can hear it running inside the wall, stop immediately and close the supply valve — water is escaping from a crack in the supply line or valve body. If nothing happens at all (no sound, no water), the pipe may still be frozen — apply gentle heat with a hair dryer to the supply pipe through the wall (never use open flame).
3. 3Step 3 — replace the seat washer (dripping spout): shut the indoor supply shutoff for this faucet. Open the outdoor faucet to relieve pressure. Remove the handle screw (under the decorative cap) and pull off the handle. Use an adjustable wrench or channel-lock pliers to unscrew the packing nut (the large hex fitting behind the handle). Pull the entire stem straight out of the faucet body — it threads out counterclockwise. At the back end of the stem (the valve seat end), you will find a rubber flat washer held by a brass screw. Remove the screw, pop out the old washer, and press in a new one of the same diameter (typically 5/8-inch for 1/2-inch hose bibs, 3/4-inch for 3/4-inch bibs). Reinstall the stem, snug the packing nut, restore water, and test.

1. 4Step 4 — fix a stem leak (packing nut or O-ring): if water weeps from around the handle shaft during operation, tighten the packing nut 1/8 turn clockwise with the faucet running (never tighten when fully closed). If this doesn't resolve it, shut the supply, remove the stem (as in Step 3), and replace the packing. For traditional packing: remove the old graphite or cotton rope from the packing nut cavity and wrap 2–3 tight counterclockwise turns of new Teflon packing cord (also called graphite rope packing) around the stem. For O-ring packing: slide the old O-ring off the stem and roll a new one on — match the O-ring diameter to the original. Reinstall the stem, snug the packing nut (hand-tight plus 1/4 turn), restore supply, and test.
2. 5Step 5 — replace the vacuum breaker cap: if the faucet sprays from the side of the spigot body near the outlet when turned on, or if flow is notably lower than usual, the vacuum breaker has failed. With the faucet turned off, unthread the vacuum breaker cap from the spigot outlet (it typically threads counterclockwise and may require channel-lock pliers if mineral scale has bonded it). Take the old cap to a hardware store to match the thread diameter, or note the faucet brand and measure the outlet diameter. Thread on the new cap hand-tight plus 1/4 turn. Restore water and confirm flow is restored and no side spray occurs.
3. 6Step 6 — replace the entire hose bib when repair isn't viable: if the faucet body is cracked from freezing, the valve seat is badly eroded, or the frost-free standpipe is damaged beyond the stem assembly, full replacement is the right call. Shut the main water supply. Open the outdoor faucet and a nearby indoor faucet to drain the line. If the hose bib is threaded into a threaded fitting (common in 1980s–2000s construction), use a pipe wrench to unthread the old unit counterclockwise and thread the new one in with PTFE tape on the threads. If the supply pipe is soldered copper, use a pipe cutter to cut the supply line 6 inches from the wall, deburr, and install a new frost-free sillcock with a push-fit SharkBite fitting or solder connection. Ensure the new frost-free sillcock is at least 6 inches longer than the wall thickness so the valve seat is inside the heated space.
4. 7Step 7 — winterize to prevent future freeze damage: before the first hard freeze, disconnect all garden hoses from the outdoor faucets. For standard hose bibs, close the indoor shutoff valve, then open the outdoor faucet handle to drain the supply pipe (leave the handle open until dripping stops). For frost-free sillcocks, simply disconnect the hose — the sillcock drains automatically when the hose is removed. Install insulated faucet covers ($4–$8 each) over the outdoor handle for extra protection below 20°F. Do not rely on faucet covers alone for standard hose bibs — the indoor shutoff is essential.

Repair vs Replace

Recommended Tools & Parts

• Danco 88604 Hose Bib Seat Washer Assortment

  Assorted flat and beveled seat washers for 1/2-inch and 3/4-inch hose bibs and sillcocks. Includes common sizes for standard compression-type outdoor faucets. Neoprene rubber resists outdoor temperature extremes better than standard rubber.

  $3–$6

  Buy on Amazon →

• Woodford 34CP Vacuum Breaker Replacement Cap

  Replacement anti-siphon vacuum breaker cap for Woodford-style outdoor hose bibs. Fits 3/4-inch spigot outlet. Also compatible with many other brands with same thread. Prevents backflow contamination of potable water supply.

  $5–$10

  Buy on Amazon →

• Watts Hydrant Frost-Free Sillcock (3/4-inch, 8-inch length)

  Frost-free anti-siphon sillcock, 3/4-inch MIP threaded connection, 8-inch standpipe length. Integral vacuum breaker. For walls up to 8 inches thick. Compatible with 1/2-inch and 3/4-inch copper supply lines via adapter. Full replacement when existing sillcock is freeze-damaged.

  $20–$40

  Buy on Amazon →

• SharkBite 1/2-inch Slip x 3/4-inch Male NPT Fitting

  Push-fit connector for attaching a new hose bib to existing 1/2-inch copper supply line without soldering. Press onto the copper pipe after cutting — no torch needed. Rated for potable water and outdoor use.

  $8–$15

  Buy on Amazon →

Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.

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