GUOFIS 10-Pack Angle Compression Stop Valve, 1/2 in x 3/8 in, 1/4 Turn Review
Ten lead-free brass 1/4-turn compression stop valves for 1/2 in copper or PEX supply lines to 3/8 in fixture hoses.
| Brand | GUOFIS |
|---|---|
| Category | Plumbing Valves |
| Material | Lead-free brass with chrome-plated finish |
| Inlet Connection | 5/8 in compression (fits 1/2 in nominal pipe) |
| Outlet Connection | 3/8 in compression |
| Valve Operation | 1/4 turn on/off |
| Best for | Multi-fixture supply shutoffs on copper or PEX lines |
Product Overview
This GUOFIS product is a 10-pack of angle compression stop valves with 1/4 turn shutoff. The bodies are lead-free brass with a chrome-plated finish, and the listing states they are UPC certified and approved for drinking water standards. The inlet is a 5/8 in compression fitting that fits 1/2 in nominal pipe, and the outlet is a 3/8 in compression fitting for common toilet and faucet supply hoses.
This review checks the listed material, connection sizing, certification, and compatibility claims for copper or PEX water lines, along with practical installation considerations the listing confirms.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
Made from lead-free brass, complying with drinking water standards.
Chrome-plated finish resists corrosion and rust.
5/8 in compression inlet fits 1/2 in pipe; 3/8 in compression outlet fits standard fixture hoses.
1/4 turn on/off angle valve for fast supply line shutdown.
Works with copper or PEX water pipes according to the listing.
Design and Build Quality
The valve bodies are listed as lead-free brass with chrome plating, which the product page says resists corrosion and rust. This construction is intended for drinking water lines and is backed by UPC certification and approval.
Both connections are compression style, one 5/8 in OD compression inlet for 1/2 in nominal copper or PEX and one 3/8 in OD compression outlet for standard fixture hoses. The 1/4-turn mechanism allows quick on/off. The listing does not provide external dimensions or weight, so plan clearances from typical valve sizes.
Performance in Everyday Use
On paper, these valves can isolate individual water supply lines for fixture replacement or repair, so the whole house water does not need to be shut off. The listing says the valves are suitable for residential and commercial applications for hot and cold water.
One real limitation is that the listing does not confirm maximum working pressure or temperature ratings. Confirm those details with the manufacturer before using them in high-pressure or unusual temperature applications. Compression joints also require correct assembly, and no torque specification is provided in the listing.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Material | Lead-free brass, chrome-plated | Feature bullet: made of lead free brass and a chrome-plated finish | 8.5 | Corrosion and rust resistance with drinking water standard compliance. |
| Connections | 5/8 in comp inlet x 3/8 in comp outlet | Connection Size bullet: inlet 5/8 in compression fits 1/2 in pipes; outlet 3/8 in compression | 8.0 | Fits common 1/2 in nominal supply lines and 3/8 in fixture hoses. |
| Certification | UPC Certified and Approved | Feature bullet: uniform Plumbing Code (UPC) Certified and Approved | 8.5 | Meets recognized plumbing code for drinking water use. |
| Operation | 1/4 turn on/off | Package Includes bullet: 1/4 turn on/off angle valve | 8.0 | Quick shutoff for isolated repairs without turning off whole house. |
| Package Count | 10 pack | Package Includes bullet: Include 10 pack | 9.0 | Good quantity for multi-fixture jobs or keeping spares on hand. |
Who Should Buy It
- Toilet supply shutoffs
- Faucet supply shutoffs
- Copper pipe installations
- PEX pipe installations
- Hot and cold water supply lines
- Buyers who need stated pressure or temperature limits
- No published pressure or temperature ratings
- Sold only as a 10-pack in this listing
Full Specifications
How It Compares
| Feature | GUOFIS | Typical option | Higher-tier option |
|---|---|---|---|
| Material | Lead-free brass with chrome plating | Lead-free brass, often with chrome or brushed finish | Low-cost brass or plastic, may not be lead-free |
| Connection Type | 5/8 in OD compression inlet x 3/8 in OD compression outlet | 1/2 in nominal compression or FIP inlet x 3/8 in compression outlet | Push-to-connect or threaded, sometimes requiring fewer tools or different prep |
| Valve Operation | 1/4 turn on/off | 1/4 turn or multi-turn | Multi-turn only, often slower to operate |
| Certification | UPC Certified and Approved | Often UPC or NSF certified | May lack certification or only basic compliance |
| Pack Size | 10-pack | Single valve or small multipacks | Single valve or contractor packs of mixed count |
| Pipe Compatibility | Copper or PEX | Copper, PEX, CPVC depending on fitting style | PEX-only or limited compatibility |
Alternatives Worth a Look
This 10-pack is a practical choice for multi-fixture supply shutoffs if the specifications meet your plumbing code needs. Just verify pressure and temperature limits separately because the listing does not confirm them.
Frequently Asked Questions
Are these valves lead-free?
Yes, the listing says they are made from lead-free brass and comply with drinking water standards, and are UPC certified and approved.
What pipe types do they work with?
The listing states they are compatible with copper or PEX water pipes.
What are the connection sizes?
The inlet is a 5/8 in compression fitting that fits 1/2 in nominal pipe. The outlet is a 3/8 in compression fitting for typical toilet and faucet hoses.
How many valves are included?
The package includes 10 angle stop valves.
Are these 1/4 turn shutoffs?
Yes, the valve uses a 1/4 turn on/off operation for quick isolation.
Are they suitable for hot and cold water?
The listing says they are suited for residential and commercial applications for hot and cold water.
This review is based on the manufacturer's stated specifications, the current Amazon product listing and its images, the confirmed materials and design, and our own research into plumbing valves as a product category. Our scores are editorial judgments made against consistent criteria, not laboratory measurements, and we did not carry out destructive or long-term stress testing.
Where the listing did not clearly confirm a detail, such as exact dimensions, weight or certifications, we have deliberately left it out rather than guess. If you are buying, always confirm the current specification and price on the live Amazon listing, since configurations and availability change.