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🛠️ Protect your flow, prevent the blow – pressure relief perfected.
The Merrill MFG PRVNL50 is a 1/2-inch lead-free brass pressure relief valve designed for cold water systems, featuring a 75 PSI adjustable pressure setting, corrosion-resistant materials, and certified safety standards. Ideal for professionals seeking reliable, durable plumbing protection from a trusted family-owned brand since 1949.
| Asin | B08GD12QV5 |
| Best Sellers Rank | #33,306 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #13 in Relief Valves |
| Brand Name | Merrill |
| Connector Type | Threaded |
| Customer Reviews | 4.6 4.6 out of 5 stars (205) 4.6 out of 5 stars |
| Exterior Finish | Brass |
| Inlet Connection Size | 0.5 inches |
| Inlet Connection Type | National Pipe Tapered |
| Manufacturer | Merrill Manufacturing Company |
| Manufacturer Part Number | PRVNL50-A |
| Material Type | Brass |
| Maximum Pressure | 75 psi |
| Model Number | PRVNL50-A |
| Number Of Items | 1 |
| Number Of Pieces | 1 |
| Number Of Ports | 1 |
| Outlet Connection Size | 0.5 inches |
| Outlet Connection Type | MNPT |
| Size | 1/2 inch |
| Specification Met | IAMPO, NSF/ANSI 372, AB 1953 |
| Thread Size | 1/2 inches |
| Thread Type | National Pipe Thread |
| Unit Count | 1 Count |
| Upc | 642367450519 |
| Valve Type | Pressure Relief Valve |
User
Every home need one
It marked as 75 psi but actually about 95 psi when it starts relief pressure. It does leak when I set my water pressure in pipe to be 80psi.I resolved that issue by opening the valve and turned the adjustment for about half turn clockwise. Now its starts to relief pressure about 100 psi and no longer leaks.It squeaks once when water hammer happens and leaks a few drops of water. This means it is very sensitive. I think it should be code required for every home. People are under a false sense of security of their home water pressure is under certain psi because they have a pressure regulator. The reality is if the pressure reducing valve leaks, which is very common, it will only need a little water to increase the in home water pressure. Although most pressure regulating valves are good quality but after a few years especially when you get some solids in the water, the seal will not be 100% water proof. In such case when you have a water pressure surge from the city on top of pressure surge caused by water hammer, you are likely to have a busted water pipe.This pressure relieve valve is the most reliable solution. I hope the spring will not break.I saw a lot of this kind of valve on Amazon under different brands but I believe they are all the same. I should have bought a cheaper ones to save few dollars.
User
Good item, fixed a leaking safety
Does the job, easy install
User
Good product
I wanted to add a pressure relief valve to my irrigation system after I had a sprinkler head lock up. I did test the relief pressure and it was about 70 psi. For the price, this is a great deal.
User
Seems to work perfectly
I installed this in our house about a month ago, so far it’s working great.
User
WORKS
Drips a little. Leaves a damp spot about 2” diameter on concrete. But it’s outside so I’ll live with it. It does relieve the excess pressure as needed!!
User
👍🏻
👍🏻
User
Nice relief valve for my RV water system.
Easily adjustable
User
Quality and Cheaper on Amazon
I purchased this after watching a Home Depot How To Video on YouTube. They were double the price at the common hardware stores when I needed it and I couldn't find this size in stock in store. Anyway, it worked for my pressure tank tee. And it's not the cheap, made in China lightweight material. It's pretty heavy.
Trustpilot
4 days ago
3 weeks ago