--- product_id: 261832467 title: "Merrill MFG PRVNL50 1/2\" No-Lead Pressure Relief Valve, Brass" brand: "merrill" price: "KD 7.67" currency: KWD in_stock: true reviews_count: 8 category: "Merrill" url: https://www.desertcart.com.kw/products/261832467-merrill-mfg-prvnl50-1-2-no-lead-pressure-relief-valve store_origin: KW region: Kuwait --- # 1/2 inch NPT threaded connections 75 PSI max pressure rating Lead-free brass with stainless steel springs Merrill MFG PRVNL50 1/2" No-Lead Pressure Relief Valve, Brass **Brand:** merrill **Price:** KD 7.67 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Protect your pipes, prevent the panic β€” pressure relief perfected! ## Quick Answers - **What is this?** Merrill MFG PRVNL50 1/2" No-Lead Pressure Relief Valve, Brass by merrill - **How much does it cost?** KD 7.67 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/261832467-merrill-mfg-prvnl50-1-2-no-lead-pressure-relief-valve) ## Best For - merrill enthusiasts ## Why This Product - Trusted merrill brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Essential Home Protection:** A must-have valve to prevent costly pipe bursts caused by pressure spikes and water hammer effects. - β€’ **Certified Safety Assurance:** IAMPO and NSF/ANSI 372 certified, meeting stringent industry standards for peace of mind. - β€’ **Precision Pressure Control:** Engineered to reliably relieve pressure at 75 PSI, safeguarding your plumbing system from dangerous surges. - β€’ **Universal 1/2" Threaded Fit:** Standard 1/2 inch male NPT x female FPT connections ensure seamless integration with most cold water systems. - β€’ **Durable Lead-Free Brass Construction:** Crafted with premium lead-free brass and stainless steel springs for long-lasting corrosion resistance and safety compliance. ## Overview The Merrill MFG PRVNL50 is a 1/2 inch no-lead pressure relief valve designed for cold water systems, featuring a 75 PSI pressure rating with lead-free brass construction and stainless steel springs. Certified by IAMPO and NSF/ANSI 372, it offers reliable, code-compliant protection against excessive water pressure surges, helping prevent pipe damage and costly repairs. ## Description Merrill MFG PRVNL50 1/2" No-Lead Pressure Relief Valve, Brass: desertcart.com: Industrial & Scientific Review: 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 desertcart under different brands but I believe they are all the same. I should have bought a cheaper ones to save few dollars. Review: Seems to work perfectly - I installed this in our house about a month ago, so far it’s working great. ## Features - Pressure relief valves are for protection against excessive pressure - 1/2 in. male NPT x 1/2 in. female FPT - Lead free brass with stainless steel control springs - IAMPO Certified - 1/2" Line Connection, 75 PSI - Not for use with water heaters - Cold water systems only - CALIFORNIA PROP 65 WARNING: Product may expose you to chemicals known to the State of California to cause cancer and reproductive harm. See P65Warnings.ca.gov for details ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08GD12QV5 | | Best Sellers Rank | #24,478 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Relief Valves | | Brand Name | Merrill | | Connector Type | Threaded | | Customer Reviews | 4.5 4.5 out of 5 stars (196) | | Exterior Finish | Brass | | Inlet Connection Size | 0.5 Inches | | Inlet Connection Type | National Pipe Tapered | | Manufacturer | Merrill Manufacturing Company | | Material Type | Brass | | Maximum Pressure | 75 Pound per Square Inch | | Model Number | PRVNL50-A | | 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 | | UPC | 642367450519 | | Unit Count | 1 Count | | Valve Type | Pressure Relief Valve | ## Product Details - **Brand:** Merrill - **Exterior Finish:** Brass - **Inlet Connection Size:** 0.5 Inches - **Inlet Connection Type:** National Pipe Tapered - **Material:** Brass - **Maximum Operating Pressure:** 75 Pound per Square Inch - **Number of Ports:** 1 - **Outlet Connection Size:** 0.5 Inches - **Outlet Connection Type:** MNPT - **Specification Met:** IAMPO, NSF/ANSI 372, AB 1953 ## Images ![Merrill MFG PRVNL50 1/2" No-Lead Pressure Relief Valve, Brass - Image 1](https://m.media-amazon.com/images/I/314GOvz6pML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Every home need one *by L***G on July 22, 2025* 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. ### ⭐⭐⭐⭐⭐ Seems to work perfectly *by J***S on December 15, 2025* I installed this in our house about a month ago, so far it’s working great. ### ⭐⭐⭐⭐⭐ Good product *by J***E on September 26, 2025* 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. ## Frequently Bought Together - Merrill MFG PRVNL50 1/2" No-Lead Pressure Relief Valve, Brass - MEASUREMAN 2-1/2" Dial Size, Glycerin Filled Pressure Gauge, 0-100psi/kpa, 304 Stainless Steel Case, 1/4" NPT Lower Mount - SENCTRL 100 Psi Lead-Free Glycerin Liquid Filled Low Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, for Home Potable Water Pump, Air, Well, RV Hose, Pressure Test --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.kw/products/261832467-merrill-mfg-prvnl50-1-2-no-lead-pressure-relief-valve](https://www.desertcart.com.kw/products/261832467-merrill-mfg-prvnl50-1-2-no-lead-pressure-relief-valve) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-16*