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8 Best Anti Siphon Valve Repair Kits: Fix Outdoor Faucets

A dripping hose bib or frostproof wall hydrant can turn a small repair into a frustrating guessing game. A vacuum breaker, also called an anti-siphon device, blocks hose suction from pulling contaminated water back toward the supply, while a check valve provides a one-way seal inside the faucet assembly.

The right repair depends on the valve number, the failed component, and the material used in your outdoor plumbing. These eight kits cover Woodford, Arrowhead, ASSE 1019-A, flushometer, NIBCO, Mansfield-style, and VACVBKX1B applications, with clear options for single repairs, multiple faucets, and commercial restroom systems.

A Closer Look At The Lineup

PickWhy We Picked ItBest ForAction
Woodford RK-14MH Repair Kit
Professional Pick

Woodford RK-14MH Repair Kit

Purpose-built Woodford model compatibility
Woodford 14 and 18 owners
Boltigen ASSE 1019-A Vacuum Breaker Repair Kit
Outdoor Ready

Boltigen ASSE 1019-A Vacuum Breaker Repair Kit

Broad sillcock and hose compatibility
ASSE 1019-A outdoor faucets
PJFDP Arrowhead 420 Check Valve Kit
Heavy Duty Pick

PJFDP Arrowhead 420 Check Valve Kit

Brass check valve for Arrowhead hydrants
Arrowhead 420 hydrant repairs
LZLUCKCOME 4-Piece Flushometer Vacuum Breaker Kit
Frequent-Use Pick

LZLUCKCOME 4-Piece Flushometer Vacuum Breaker Kit

Four flushometer repair components
Commercial restroom flush valves
Loner 630-7500 Vacuum Breaker Repair Kit
Value Pick

Loner 630-7500 Vacuum Breaker Repair Kit

Two complete vacuum breaker assemblies
NIBCO and Mansfield wall hydrants
KISYONGUS VACVBKX1B ASSE 1019-A Repair Kit
Compact Choice

KISYONGUS VACVBKX1B ASSE 1019-A Repair Kit

Single-pack VACVBKX1B replacement
Single outdoor faucet repairs
KISYONGUS VACVBKX1B Vacuum Breaker Kit
Garden Choice

KISYONGUS VACVBKX1B Vacuum Breaker Kit

Two-pack outdoor faucet coverage
Multi-outdoor tap maintenance
KISYONGUS 3-Pack VACVBKX1B Repair Kit
Balanced Choice

KISYONGUS 3-Pack VACVBKX1B Repair Kit

Three-pack replacement planning
Three-faucet replacement planning

A Closer Look At Each Pick

The Woodford RK-14MH Repair Kit is built around a narrow fit, covering Woodford wall hydrants using Model 14 or 18 components. That specificity makes it a sensible choice for a contractor maintaining familiar Woodford equipment, where replacing the correct metal handle and internal repair parts matters more than broad compatibility.

For a homeowner with a matching valve, this focused kit avoids the guesswork involved in a universal option. You still need to confirm the model marking on the hydrant before ordering, since the repair kit does not cover every Woodford configuration.

A Few Highlights

  • Made specifically for Woodford Model 14 and 18 wall hydrants.
  • Includes a metal handle for the matching repair application.
  • Supports service of outdoor hydrants that depend on anti-siphon protection.

Things To Consider

  • Compatibility is limited to the named Woodford models.
  • This is a repair kit rather than a complete replacement hydrant.

Quick Facts

FeatureSpecificationWhy It Matters
Hydrant modelsWoodford 14 and 18Confirms which hydrants can use the kit.
Handle materialMetalMatches the specified Woodford repair application.

Made For

You benefit most with a Woodford Model 14 or 18 hydrant and a repair focused on restoring the original-style components.

A Better Fit Elsewhere

Choose the Boltigen ASSE 1019-A Vacuum Breaker Repair Kit instead when your outdoor faucet matches that standard rather than Woodford 14 or 18.

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Where the Woodford option concentrates on two hydrant models, the Boltigen ASSE 1019-A Vacuum Breaker Repair Kit gives you a wider outdoor-faucet target. It fits ASSE 1019-A anti-siphon sillcocks used with garden hoses, sprinklers, and exterior hose bibs, making it practical for a yard with several standard fittings.

The replacement assembly creates an air gap, which is a physical separation that interrupts suction between the spout and connected hose. Its plastic construction is suited to outdoor exposure, while the straightforward replacement process suits a handy homeowner comfortable shutting off the water and handling a small plumbing repair.

Key Advantages

  • Targets the widely recognizable ASSE 1019-A configuration.
  • Works across garden hoses, sprinkler systems, and outdoor faucets.
  • Corrosion-resistant plastic suits wet outdoor installations.
  • Supports replacement of an aging vacuum breaker without replacing the entire sillcock.

Worth Noting

  • The ASSE 1019-A match remains essential rather than automatic.
  • Plastic construction differs from the brass-based PJFDP Arrowhead check valve.

Feature Snapshot

FeatureSpecificationWhy It Matters
CompatibilityASSE 1019-AProvides a clear standard for identifying the matching valve.
MaterialCorrosion-resistant plasticSuits routine exposure to water and outdoor conditions.
ApplicationsHoses, sprinklers, and outdoor faucetsCovers several common exterior water connections.

Right Fit For

You get the most from this kit with an ASSE 1019-A sillcock serving a garden hose, sprinkler line, or exterior spigot.

Where Another Pick Shines

The KISYONGUS 3-Pack VACVBKX1B Repair Kit suits you better when you maintain three matching ASSE 1019-A faucets and want spare assemblies on hand.

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This kit addresses a different failure than the two preceding vacuum breaker options. It replaces the check valve within an Arrowhead 420 stem assembly, and that one-way seal is the part that can allow an outdoor hydrant to keep dripping after the handle is closed.

Brass and rubber construction gives it a substantial feel for exposed outdoor service. The stated fit spans Arrowhead PK2004 through PK2016 models and sizes from 4 to 14 inches, offering useful coverage across several stem assemblies rather than one isolated configuration.

Reasons It Performs

  • Targets a dripping stem check valve rather than the exterior vacuum breaker.
  • Brass and rubber construction suits outdoor hydrant assemblies.
  • Supports multiple Arrowhead 420 series model numbers.
  • Fits stem sizes ranging from 4 to 14 inches.

Trade Offs

  • Arrowhead 420 compatibility does not make it suitable for Woodford or ASSE models.
  • A dripping handle can also involve other worn parts, so inspect the complete assembly.

Who It Suits Best

You benefit most when an Arrowhead 420-series wall hydrant drips from its stem and the replacement valve matches the listed model and size.

Not Your Match When

The Woodford RK-14MH Repair Kit is the better choice for a Woodford Model 14 or 18 hydrant requiring its specified handle and repair components.

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Outdoor hose bibs dominate the rest of this lineup, but the LZLUCKCOME 4-Piece Flushometer Vacuum Breaker Kit serves a separate setting: commercial toilets and urinals. A flushometer is the flush valve assembly used in many public restrooms, and this set replaces internal vacuum breaker components rather than an exterior wall hydrant.

The three-hole conical design helps keep the gasket centered during forceful flushes. With four pieces in the set, a maintenance team can service multiple fixtures or keep matching parts available for recurring inspections, though the 1.75-by-1.95-inch dimensions still need to match the tailpiece.

Good Reasons To Consider

  • Includes four components for restroom flushometer service.
  • Three-hole conical structure reduces shifting during flushes.
  • Plastic material resists mineral buildup and corrosion exposure.
  • Supports maintenance in high-traffic restroom environments.

Small Caveats

  • The dimensions must correspond to the flushometer tailpiece.
  • Inspection every 6 to 12 months remains part of routine care.

Technical Reference

FeatureSpecificationWhy It Matters
Component count4 piecesSupports multiple fixtures or future maintenance.
Dimensions1.75 by 1.95 inchesProvides a measurable tailpiece fit check.
Internal designThree-hole conical structureHelps maintain alignment during flushing.
MaterialHigh-grade plasticOffers a practical option for water-exposed components.

Who Will Love This

You benefit most when maintaining compatible commercial flushometers in a busy restroom with repeated use.

Another Choice May Suit

The KISYONGUS VACVBKX1B Vacuum Breaker Kit is the better fit for exterior ASSE 1019-A hose bibs rather than toilet and urinal flush valves.

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The Loner 630-7500 Vacuum Breaker Repair Kit serves several wall hydrant families, including Prixx 400 and 500 Series, Mansfield-style units, New Diamond 400 Series, and NIBCO 90 valves. That range makes it a useful option for a property manager maintaining different hydrant makes across a yard or rental property.

Two assemblies are included, with each package containing a vacuum breaker body, plunger, and cap. The component-level package is convenient because a failed internal piece does not force you to replace unrelated hydrant hardware.

Bright Spots

  • Supports several named wall hydrant families.
  • Provides two complete vacuum breaker assemblies.
  • Includes the body, plunger, and cap for each assembly.
  • Can be installed without specialized tools or advanced plumbing skills.

Points To Note

  • Your hydrant must fall within one of the listed series.
  • The kit serves wall hydrants rather than ASSE 1019-A hose bibs generally.

Best Suited To

You get the most value when maintaining two compatible NIBCO 90, Mansfield-style, Prixx, or New Diamond wall hydrants.

Swap It Out When

Choose the Boltigen ASSE 1019-A Vacuum Breaker Repair Kit instead when the existing valve carries the ASSE 1019-A designation.

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For one exterior faucet, quantity matters. The KISYONGUS VACVBKX1B ASSE 1019-A Repair Kit provides a single-pack option for wall hydrants and hose fittings using the VACVBKX1B reference, making it a focused choice for a patio, lawn, or garden connection.

Compared with the two- and three-pack KISYONGUS options later in the lineup, this version avoids carrying unused assemblies. That makes sense for a single repair, provided you have confirmed the VACVBKX1B and ASSE 1019-A references on the original component.

A Favorable Mix

  • Targets the identifiable VACVBKX1B replacement reference.
  • Supports exterior wall hydrant and hose fitting repairs.
  • A single pack suits a one-faucet repair without surplus parts.
  • Fits the practical scope of a patio, lawn, or garden tap.

Practical Considerations

  • Both the VACVBKX1B and ASSE 1019-A references need confirmation.
  • One assembly will not supply spares for additional matching faucets.

At A Glance

FeatureSpecificationWhy It Matters
Replacement referenceVACVBKX1BProvides the main part number for matching.
ConfigurationASSE 1019-AIdentifies the applicable valve design.
Pack quantity1 packSuits a focused single-faucet replacement.
Use areaPatio, lawn, and gardenMatches common exterior water applications.

Built With In Mind

You benefit most when repairing one VACVBKX1B outdoor faucet and prefer a concise single-pack assembly.

A Better Fit Elsewhere

The KISYONGUS 2-Pack VACVBKX1B Vacuum Breaker Kit suits you better when two matching outdoor faucets need service.

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The KISYONGUS VACVBKX1B Vacuum Breaker Kit carries two assemblies for ASSE 1019-A outdoor faucets. That middle ground works well for a household with one immediate repair and a second matching tap, or for a property where keeping a spare assembly reduces the chance of a second service trip.

Its listed components include the vacuum breaker and valve handle replacements, while an air gap separates the water outlet from the connected hose. The scope differs from the Boltigen kit, which emphasizes plastic construction and use with ASSE 1019-A anti-siphon sillcocks across hoses, sprinklers, and spigots.

Everyday Wins

  • Provides two matching outdoor faucet repair assemblies.
  • Supports VACVBKX1B and ASSE 1019-A configurations.
  • Includes vacuum breaker and valve handle replacements.
  • Air-gap design interrupts suction through a connected hose.

Less Ideal Details

  • Two packs are unnecessary for a one-faucet repair.
  • The listed configuration does not cover unrelated hydrant brands.

The Right Fit

You benefit most when two outdoor taps use VACVBKX1B components and one replacement will be kept in reserve.

Look Elsewhere When

The KISYONGUS VACVBKX1B ASSE 1019-A Repair Kit is the better fit for a single exterior faucet without a need for spare parts.

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Three matching outdoor faucets turn the KISYONGUS 3-Pack VACVBKX1B Repair Kit into a practical maintenance purchase. It targets the VACVBKX1B reference and ASSE 1019-A configuration for wall hydrants, giving you replacement parts for several compatible exterior connections.

Compared with the single-pack version, this set reduces the need for repeat ordering while keeping the same fitting family in reserve. The tradeoff is straightforward: you gain convenience across multiple taps but carry more components than a one-location repair requires.

What It Does Well

  • Covers three matching VACVBKX1B outdoor assemblies.
  • Targets the ASSE 1019-A configuration for exterior hydrants.
  • Useful for properties with several compatible hose bibs or wall taps.
  • Keeps matching replacement parts ready for planned maintenance.

Small Limitations

  • Three assemblies take more space than a single-pack repair kit.
  • Every replaced faucet must share the stated fitting references.

Core Details

FeatureSpecificationWhy It Matters
Replacement referenceVACVBKX1BIdentifies the matching component family.
ConfigurationASSE 1019-ASupports a direct compatibility check.
Quantity3 packsSupports multiple matching outdoor faucets.
ApplicationOutdoor wall hydrantsMatches common exterior hose connections.

Whose Shelf It Belongs On

You benefit most when maintaining three or more matching VACVBKX1B outdoor faucets around a home or rental property.

Reach For A Different Pick When

The Boltigen ASSE 1019-A Vacuum Breaker Repair Kit suits you better when you need one replacement for a standard outdoor sillcock.

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Match the Repair to Your Outdoor Faucet

Start With the Valve Number

The first check is the model or part number molded into the existing faucet. Woodford 14 and 18, Arrowhead PK models, NIBCO 90, Mansfield-style units, and VACVBKX1B each describe different assemblies, so a close visual resemblance does not confirm compatibility. Record the brand, model, and size before ordering.

Identify the Failed Component

A handle that will not close, a faucet that continues to drip, and a hose connection that behaves oddly can point to different parts. A vacuum breaker kit addresses the anti-siphon assembly, while the PJFDP Arrowhead 420 Check Valve Kit focuses on the one-way stem seal. Replace the component that has actually failed rather than the entire faucet by default.

Compare Material and Application

Brass and rubber offer a different construction profile from the plastic used in several outdoor vacuum breaker kits. Match that material information to your climate and installation, while also confirming that the kit is intended for a hose bib, wall hydrant, or commercial flushometer rather than a different plumbing fixture.

Plan the Quantity and Installation

Single packs suit one known repair, while two- and three-packs help with multiple matching taps or spare parts. Before disassembly, shut off the water and identify the existing component shape. Gloves are sensible during removal, and a clear model reference keeps the installation centered on the correct valve.

Getting the Fit Right Before Ordering

Mistakes Worth Dodging

Avoid ordering by appearance alone, since many outdoor faucets share a similar spout and handle. Read the replacement reference and part dimensions, separate a vacuum breaker from a check valve, and confirm that your hose, sprinkler, or restroom fixture matches the intended application.

Where The Extra Money Goes

Higher-priced kits often add broader compatibility, stronger materials, or more replacement components. Those additions can be worthwhile for multiple outdoor taps or demanding commercial fixtures. A focused single-pack remains more economical when one small assembly needs service.

Frequently Asked Questions

What Is an Anti Siphon Valve Repair Kit?

It is a parts kit used to replace a worn or damaged vacuum breaker on an outdoor faucet or compatible valve assembly. The component helps block hose suction from reaching the water supply.

How Do I Know Which Repair Kit Fits?

Confirm the faucet brand, model, part number, and dimensions before ordering. Exact compatibility matters because similar exterior spouts can use different internal assemblies.

Can One Kit Repair Several Faucets?

Multi-pack kits can cover several matching faucets, provided every valve uses the same stated configuration. A single pack remains the neater choice for one confirmed repair.

Are Plastic Repair Kits Suitable for Outdoor Use?

Several kits in this lineup use plastic specifically for outdoor faucet applications. You still need the exact model match and should inspect the replacement during routine maintenance.

Do I Need to Replace the Entire Outdoor Faucet?

Usually not, because many faults come from a replaceable valve, check valve, handle, or vacuum breaker assembly. Replace the full faucet only when its body or connections are damaged or the required component cannot be found.

Final Verdict

Start with the number on the failed part, not the shape of the faucet. Woodford and Arrowhead owners have tightly matched repair options, while ASSE 1019-A and VACVBKX1B users can choose from one-, two-, or three-pack arrangements. Match the exact component, shut off the water, and replace only the part that needs service.