SUNROAD 3 Pack SUNROAD Lead-Free Brass 3/4" Inch MHT Hose Bibb Connector Backflow Preventer Vacuum Breaker,Check Valve For Garden Spigot RV Hose Connection,Anti-Siphon Fitting with extra set screws

Why I installed these and what I was looking for

A small brass fitting can prevent a very big headache: contaminated water backing into your home’s supply. I installed the SUNROAD vacuum breaker on two hose bibbs and an RV hose connection to add a reliable hose-connection backflow safeguard and to meet the same standard many jurisdictions require at outdoor faucets. I was also looking for something I could mount permanently on one spigot by code, and keep removable on the others for winterizing—without buying two different products. This 3-pack made sense for a typical home with two or three outdoor taps, with one spare for the parts bin.

Build and standards

The housings are lead-free brass and feel appropriately stout, with clean threads and a tidy casting. They’re rated 125 PSI and 180°F—well within the conditions you’ll see at a typical residential hose bibb—and they carry ASSE 1011/CSA B64.2 and ANSI/NSF 61 certifications. That combination tells me two things: the device is designed for hose-connection vacuum breaker service (not some generic check valve) and it’s safe for potable-water contact. For anything touching drinking water or garden hoses that get used for pet bowls and rinsing produce, that’s non-negotiable.

Each breaker has a small drain/vent port. That’s by design: it admits air to break siphonage and lets residual water escape when the faucet closes. You’ll want to point that port away from you before the first test; it does spit briefly when you shut off the faucet.

What’s in the box that actually matters

The kit is complete in a thoughtful way:
- Three vacuum breakers
- Extra rubber washers
- An Allen key
- Both types of set screws: breakaway screws for permanent installations and headless hex set screws for removable use
- Thread seal tape

The dual set-screw option is a standout. Many vacuum breakers only include breakaway screws, which are appropriate (and sometimes required) for tamper-resistance but can make seasonal removal or replacement a chore. Here, you can choose permanent or removable on a per-spigot basis without buying a different model.

Installation: quick, with a couple of nuances

These are 3/4-inch garden hose thread (GHT/NH), which fit standard U.S. hose bibbs and RV city water connections. They’re not for fine-thread fittings, pipe thread (NPT), or European BSP taps.

My steps that worked well:
1. Confirm the rubber washer is seated inside the breaker’s female end. That washer is the primary seal for hose-thread connections.
2. Wrap the faucet’s male threads lightly with the included tape. This is mainly anti-seize to discourage galling and corrosion—not for sealing the water path. Important: keep the tape back from the spigot’s sealing edge so it doesn’t fold under the edge and interfere with the washer seal.
3. Hand-tighten until snug, then a small additional turn with a wrench if needed. Hose threads are a clamp; they don’t need to be cranked down like pipe threads.
4. Choose your set screw:
- Permanent (code/anti-theft): install the breakaway screw until the head snaps off.
- Seasonal/removable: install the headless hex set screw with the included Allen key.
5. Aim the drain port away from people, doors, or windows.

Total time per faucet was a few minutes including the set screw. If your sillcock threads are chewed up, the fresh washer and a light tape wrap will usually rescue the seal.

Performance in everyday use

Once installed, I saw the behavior you want from a hose-connection vacuum breaker:
- Under normal flow, water passes through without fuss. With a standard 5/8-inch hose, I observed no noticeable drop in sprinkler throw or hose-end pressure.
- When closing the faucet, the small vent port spits for a moment as it drains. That’s normal and confirms the vacuum-break function is alive and well.
- With downstream valves closed (spray nozzles or timers), the breaker stayed quiet and tight. No dribbling from the threads or body; an occasional brief “sigh” at shutoff is expected.

If you ever see a steady leak from the vent during normal use, check the washer seating and make sure you haven’t overtaped or let tape creep under the sealing edge.

Compatibility and fit

• Standard hose bibbs: Yes, 3/4-inch GHT/MHT.
• RV city water or hydrants with hose threads: Yes.
• Not for: Fine-thread or pipe-thread outlets, indoor fixtures, or any connection that isn’t 3/4-inch garden hose thread.

The body is compact enough to tuck under a typical hose reel or vacuum cover. The brass has a clean finish—purely cosmetic, but it gives the faucet a tidy look.

Maintenance and longevity

• Washers matter: Hose washers are the seal. Expect to replace them periodically; the kit includes spares, and a bag of extras is inexpensive insurance.
• Winter: These are not freeze-proof. In freezing climates, I recommend using the headless set screw so you can remove the breaker easily for winter or ensure the frost-free sillcock drains properly. If you must leave it installed, disconnect hoses and make sure the faucet can drain.
• Cleaning: If grit gets into the vent, a quick rinse usually clears it.

Brass holds up far better than plastic in UV and temperature swings. With the standards and operating ratings here, I’m confident in multi-year service under normal use.

What could be better

• Documentation: An install card would help new users understand the washer-based seal, the purpose of the vent, and when to choose each set screw.
• Sharp edge: One of my units had a slightly sharp edge at the drain port. Gloves and a quick check before installation avoid surprises.
• The “spritz” at shutoff: It’s the right behavior, but it can catch you out the first time. Aim the vent away from walkways.

None of these are deal-breakers, but they’re worth knowing before you start.

Tips from the install bench

• The seal is washer-to-spigot edge, not in the threads. If you see thread weeping, fix the washer interface first.
• Use tape sparingly and keep it behind the sealing edge to avoid creating a leak path.
• If required by your local code, use the breakaway screw on at least one hose bibb and leave that device in place year-round.
• Replace hardened washers annually; it’s the cheapest way to prevent “mystery leaks.”
• For orientation-sensitive installs (near doors or windows), dry-fit first to position the vent.

Bottom line

As a compact, code-appropriate backflow solution for hose outlets, the SUNROAD vacuum breaker does exactly what it should: it prevents back-siphonage, drains reliably, and gives you control over permanent versus removable mounting without extra purchases. The brass build, recognized standards (ASSE 1011/CSA B64.2; ANSI/NSF 61), and the inclusion of both breakaway and headless set screws make it practical for both compliance and convenience. The 3-pack format makes sense for most homes.

I’d recommend this tool for homeowners, gardeners, and RV users who need a straightforward, durable hose-connection vacuum breaker. It’s easy to install, performs as expected, and the kit is complete. The only caveats are to confirm you have standard 3/4-inch hose threads, be ready for the normal drain splash at shutoff, and consider using the removable set screw if you winterize. If you need a fine-thread or pipe-thread device, this isn’t it; otherwise, it’s an excellent value and a solid choice.