Reliance Water Controls 3 Port, 3 Bar Prv

MAN.CODE PRED320100

Reliance Water Controls 3 Port, 3 Bar Pressure Relief Valve (PRV) – Trusted Overpressure Protection for Sealed Systems

Product Summary

The Reliance Water Controls 3 Port, 3 Bar PRV is a premium-quality safety valve designed to protect sealed domestic and commercial heating systems from dangerous pressure build-up. With its 3-port configuration, this valve offers added flexibility for pipework layout and is a common choice for system boilers, unvented hot water cylinders, and thermal store units. Manufactured by industry-trusted Reliance Water Controls, it provides reliable, consistent operation in a wide range of applications.

Whether you're a heating engineer replacing a faulty valve or a DIYer maintaining system safety, this PRV ensures dependable overpressure protection and easy installation.

Key Features

• 3-port design – adds versatility in installation and positioning

• Set pressure of 3 bar – ideal for sealed heating and hot water systems

• Durable brass construction – corrosion-resistant and built to last

• Spring-loaded mechanism – ensures accurate pressure relief performance

• Compact body with pre-fitted O-ring for leak-tight fit

• Compatible with a wide range of boiler and cylinder types

• BSP connections – standard sizes for quick installation

Compatible Applications & Boiler Models

This 3 Bar PRV is widely compatible with:

• Sealed system boilers (e.g., Vaillant, Worcester, Ideal, Baxi)

• Unvented hot water cylinders

• Thermal stores

• Solar thermal systems

• Heat interface units (HIUs)

Check manufacturer instructions or consult your system’s datasheet to verify part compatibility.

When to Replace

• PRV is leaking from the outlet port

• System pressure drops unexpectedly or discharges frequently

• During annual maintenance or system refurbishment

• PRV is damaged or showing signs of corrosion

• Replacing the expansion vessel or upgrading control components

Technical Specifications

• Manufacturer: Reliance Water Controls

• Type: 3-port pressure relief valve

• Set Pressure: 3 bar

• Body Material: Brass

• Connection Size: Typically 15mm or 22mm BSP (verify with product label)

• Orientation: Horizontal or vertical installation depending on configuration

• Application: Domestic and light commercial sealed systems