---
product_id: 229523294
title: "PRVNL75"
brand: "merrill"
price: "S$34"
currency: SGD
in_stock: null
reviews_count: 8
url: https://www.desertcart.sg/products/229523294-prvnl75
store_origin: SG
region: Singapore
---

# Lead-free brass & stainless steel 75 PSI max pressure 3/4" NPT connections PRVNL75

**Brand:** merrill
**Price:** S$34
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Protect your pipes with precision — because safety never goes out of style!

## Quick Answers

- **What is this?** PRVNL75 by merrill
- **How much does it cost?** S$34 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/229523294-prvnl75)

## 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

- • **Versatile Plumbing Fit:** Standard 3/4" male NPT x 1/2" female FPT connections for easy integration
- • **Premium Lead-Free Brass:** Eco-conscious and IAMPO certified for peace of mind
- • **Compact & Durable Design:** Space-saving 2.47" x 1.45" profile built to last
- • **Precision Pressure Control:** Reliable 75 PSI relief to safeguard your system
- • **Cold Water System Optimized:** Engineered exclusively for cold water, ensuring optimal performance

## Overview

The Merrill MFG PRVNL75 is a compact, lead-free brass pressure relief valve designed for cold water systems. Featuring 3/4" NPT connections and a maximum operating pressure of 75 PSI, it ensures reliable protection against excessive pressure. IAMPO certified and built with stainless steel springs, this valve combines durability with eco-friendly materials for professional-grade plumbing safety.

## Description

Merrill MFG PRVNL75 No Lead Brass Pressure Relief Valve 75 PSI, 3/4"

## Features

- Pressure relief valves are for protection against excessive pressure
- 3/4 in. male NPT x 1/2 in. female FPT
- Lead free brass with stainless steel control springs - IAMPO Certified
- 3/4" Line Connection, 75 PSI
- Not for use with water heaters -Cold water systems only

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Brass |
| Brand | Merrill |
| Item dimensions L x W x H | 2.47 x 1.45 x 1.05 inches |
| Exterior Finish | Brass |
| Inlet Connection Size | 0.75 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Outlet Connection Type | MNPT |
| Maximum Operating Pressure | 75 Pound per Square Inch |
| Number of Ports | 2 |
| Outlet Connection Size | 0.75 Inches |
| Specification Met | IAMPO, RoHS |
| Manufacturer | Merrill Manufacturing Company |
| UPC | 642367450236 |
| Part Number | PRVNL75 |
| Item Weight | 6.4 ounces |
| Product Dimensions | 2.47 x 1.45 x 1.05 inches |
| Item model number | PRVNL75 |
| Size | 3/4 inch |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Brass
- **Brand:** Merrill
- **Item dimensions L x W x H:** 2.47 x 1.45 x 1.05 inches
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 0.75 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Outlet Connection Type:** MNPT
- **Maximum Operating Pressure:** 75 Pound per Square Inch
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.75 Inches

## Images

![PRVNL75 - Image 1](https://m.media-amazon.com/images/I/615cOhe2IWL.jpg)

## Questions & Answers

**Q: Will this pressure valve reset after water line thaws**
A: The preset pressure relief valve will still be set at 75 PSI as long as the valve is not broken because it was frozen.  If a valve is allowed to freeze then the warranty is void.  To answer your question thawing out a water line will not change the valve preset pressure.

**Q: In my house main, I have installed pressure relief valves but they all leak at a drop/second Would the leak stopped over time as it stabilizes?**
A: If the pressure on the house main is close to 75psi then it will continue to drip, or if the pipes were not flushed out before the valve was installed then a small piece of something like sand could be wedged under the seal of the valve.  So, no for sure answer if it will quit.
Unless the water pressure in the pipe is around 75 psi.

**Q: How do you adjust the pressure? There was no documentation.**
A: This valve can not be adjusted.  We can not assume the liability if adjusted incorrectly or set at to high a pressure.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great quality
*by P***J on May 27, 2025*

Does exactly what it's supposed to.

### ⭐⭐⭐⭐⭐ Product
*by M***  on January 22, 2025*

Works great

### ⭐⭐⭐⭐⭐ Reasonable price
*by C***. on May 15, 2025*

Good quality.

## Frequently Bought Together

- Merrill MFG PRVNL75 No Lead Brass Pressure Relief Valve 75 PSI, 3/4"
- 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
- Merrill MFG PRVNL50 1/2" No-Lead Pressure Relief Valve, Brass

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**Shop now:** [https://www.desertcart.sg/products/229523294-prvnl75](https://www.desertcart.sg/products/229523294-prvnl75)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-12*