Pressure Relief Valve


SKU: 135728 Category: GTIN: 9314706000082

Replacement hot water pressure relief valve to suit Isotemp water heaters. Threaded 1/2″ BSP and preset to 500kPa. Requires 135730 and a 135734 if retro-fitting to existing systems.

Accessories
135730 15mm Brass ‘T’
135734 Brass Nipple

$399.90

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Pressure Relief Valve – Protect Your Water System

Prevent Dangerous Overpressure

The Pressure Relief Valve ensures the safe operation of pressurized water systems by automatically releasing excess pressure. When system pressure rises beyond safe limits—typically during heating cycles—this valve activates instantly, releasing water to prevent damage to tanks, pipes, or fittings.

Built for Water Heating Systems

Ideal for marine, RV, and off-grid setups, this valve works especially well with hot water systems. As water heats and expands, internal pressure increases. Rather than risking structural damage or leaks, the valve opens at a preset pressure threshold, ensuring safety and stability throughout your system.

Durable and Corrosion-Resistant

Manufacturers use corrosion-resistant materials to build this valve, making it highly reliable in marine environments or high-humidity areas. It withstands constant exposure to water and fluctuating temperatures, maintaining dependable performance even in challenging conditions.

Simple and Fast Installation

With its standard threaded design, the valve installs quickly onto compatible water heater ports or plumbing lines. You can attach it using basic tools, without special fittings or modifications. Furthermore, its compact size fits easily into tight spaces, saving room in crowded utility areas.

Long-Term, Reliable Operation

Each valve is tested to perform at its rated pressure setting, offering consistent, automatic protection. Because it operates mechanically, you don’t need to monitor it during regular system use. Moreover, it requires minimal maintenance and is easy to replace if needed.


Key Features

  • Automatically releases excess pressure for system safety

  • Designed for use with marine, RV, and off-grid water heaters

  • Protects against tank and pipe failure

  • Durable, corrosion-resistant materials

  • Installs easily with standard threaded fittings

  • Compact and reliable—perfect for small system enclosures

  • Low-maintenance, factory-tested component


Compact Protection for Pressurized Systems

The Pressure Relief Valve provides an essential safeguard for any sealed water heating system—delivering reliability, efficiency, and peace of mind.

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SKU: 135728 Category: GTIN: 9314706000082
Weight 0.3 kg
Dimensions 17 × 8 × 5 cm

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