---
product_id: 261832467
title: "Merrill MFG PRVNL50 1/2\" No-Lead Pressure Relief Valve, Brass"
brand: "merrill"
price: "VT5536"
currency: VUV
in_stock: true
reviews_count: 8
category: "Merrill"
url: https://www.desertcart.vu/products/261832467-merrill-mfg-prvnl50-1-2-no-lead-pressure-relief-valve
store_origin: VU
region: Vanuatu
---

# Pressure relief at ~95-100 PSI Lead-free brass with stainless steel springs 1/2" NPT x FPT connections Merrill MFG PRVNL50 1/2" No-Lead Pressure Relief Valve, Brass

**Brand:** merrill
**Price:** VT5536
**Availability:** ✅ In Stock

## Summary

> 🚰 Protect your pipes, prevent the panic — 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?** VT5536 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/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

- • **Code-Ready Peace of Mind:** IAMPO certified and designed for cold water systems, making it a smart, code-compliant upgrade for every modern home.
- • **Precision Pressure Control:** Engineered to activate around 95-100 PSI, safeguarding your plumbing system from dangerous surges.
- • **Sensitive & Reliable Safety Valve:** Highly responsive to pressure fluctuations, preventing costly pipe bursts and water damage.
- • **Universal 1/2" Line Compatibility:** Standard 1/2 inch male NPT x female FPT connections ensure seamless integration with most cold water systems.
- • **Durable Lead-Free Brass Construction:** Built with premium lead-free brass and stainless steel springs for long-lasting, corrosion-resistant performance.

## Overview

The Merrill MFG PRVNL50 is a lead-free brass pressure relief valve designed for cold water systems, featuring 1/2" NPT x FPT connections and stainless steel springs. It reliably activates around 95-100 PSI to prevent excessive pressure buildup, ensuring plumbing safety and durability. IAMPO certified and built for long-term corrosion resistance, this valve is an essential upgrade for any home aiming to avoid costly water damage.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Merrill |
| Exterior Finish | Brass |
| Inlet Connection Size | 0.5 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Material | Brass |
| Outlet Connection Type | MNPT |

## Product Details

- **Material:** Brass
- **Brand:** Merrill
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 0.5 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Outlet Connection Type:** MNPT
- **Maximum Operating Pressure:** 75 Pound per Square Inch
- **Number of Ports:** 1
- **Outlet Connection Size:** 0.5 Inches
- **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
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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-22*