2-Pack SM01 Vacuum Breaker Adapter - Converts Arrowhead Spigots

In this review the 2-Pack SM01 Vacuum Breaker Adapter is judged on fit, durability and ease of installation for Arrowhead outdoor spigots. The bottom line: it is for homeowners and handymen who need a permanent, no-leak replacement when an external vacuum breaker is corroded or the set screw is broken. The adapter replaces the troublesome vacuum breaker and restores a straight through garden hose connection, and most users will find the conversion fast and cost effective compared with replacing the entire faucet.

Key Features

• Made in the USA: Precision machined construction aims to provide consistent thread fit and long lasting performance for outdoor use.
• Fits Arrowhead spigots: Designed for spigots with a 1.05 in outer thread diameter so it converts special vacuum breaker threads to a normal garden hose connection.
• Two adapters per pack: The 2-pack gives a spare or a second install for multiple outdoor spigots without repeated orders.
• Simple replacement process: Removes the leaking external vacuum breaker by using two wrenches and screws on quickly to stop leaks and allow standard hose attachment.
• Good for hard water and timers: Prevents excessive leakage common when vacuum breakers fail under hard water or with irrigation timers.

Who It's For

This product is best for homeowners, rental property managers, and gardeners who have Arrowhead-style outdoor spigots with removable vacuum breakers and want to avoid replacing the whole faucet. It suits people who prefer a durable, locally made replacement and those who want a quick field repair they can perform with basic tools.

People should look elsewhere if their vacuum breaker cannot be removed because of irreparably corroded set screws and they cannot access the full breaker; in that case the SPGTM-2 or SPGTM-5 models that fit the bottom half may be a better fit. Also verify your spigot thread measures about 1.05 in outer diameter before purchasing.

Pros & Cons

Pros

• Well made and machined in the USA, which customers cite as a sign of quality and fit.
• Stops leaks effectively and restores a straight through garden hose connection without replacing the spigot.
• Easy installation for most users, often taking just a few minutes with two wrenches.

Cons

• Must match the 1.05 in outer thread diameter; thread size received mixed feedback so measuring is required before purchase.

Specifications

Brand	SpigotMaster Inc.
Model	SPGTM-1 (SM01)
Pack	2-Pack
Fits	Arrowhead spigots when entire vacuum breaker can be removed
Outer thread diameter	1.05 in
Internal thread diameter	1 in
Made in	USA

Our Verdict

The 2-Pack SM01 Vacuum Breaker Adapter is a practical, cost effective fix for Arrowhead spigots that eliminates leaks and restores a normal hose connection. For anyone able to remove the full vacuum breaker and who measures a matching 1.05 in thread, it delivers durable performance and easy installation, making it a better value than replacing the entire faucet.

Frequently Asked Questions

Will this fit my spigot?
It fits Arrowhead spigots with an outer thread diameter of about 1.05 in; measure your spigot threads before buying.

Can I install it if the vacuum breaker screw is broken?
If the entire vacuum breaker can be removed with two wrenches you can install the SM01; if the breaker cannot be removed consider SPGTM-2 or SPGTM-5 models.

Does it stop hard water leaks?
Yes, customers report it prevents the excessive leaks that occur when external vacuum breakers fail under hard water or irrigation timers.