Best Relief Valve Pumps

What are the best relief valve pumps?
We reviewed the top 10 options to help you find durable, easy-to-install valves that protect your equipment.

Relief valves are essential for keeping your equipment safe and running smoothly. Whether you’re using a pressure washer, hydraulic system, or pool filter, the right valve can prevent damage and save you money.

We’ve tested and reviewed the best relief valves to help you find the perfect fit. Easy to install, durable, and reliable, these valves ensure your systems stay protected.

List of Top 10 Relief Valve Pumps

Title	Best For	Price
2 Pcs 7101359 Thermal Relief Valves for Simpson Cleaning 7101359	This product is perfect for anyone with a high-pressure washer needing reliable thermal protection. It’s easy to install and saves money in the long run.	View on Amazon (paid link)
Merrill MFG PRVNL75100 3/4″ Lead-Free Brass Pressure Relief Valve, 100 PSI Cold Water Safety Valve for Well Tank, Pump & Plumbing Systems, 3/4″ NPT No-Lead Water System Protection Valve	Home owners must guard their water system. This unit stops high pressure damage.	View on Amazon (paid link)
98209803 High Flow Manual Air Relief Valve for Pool and Spa Filter	Pool owners fix air in filters with this easy valve. It fits Warrior and EasyClean brands.	View on Amazon (paid link)
Wovnet Adjustable Aluminum Pressure Relief Valve, 20 Gpm; 3000 Psi; #8 Sae (3/4-16 Orb), Hydraulic Pressure Control Valve for Systems and Pumps	This Wovnet Adjustable Aluminum Pressure Relief Valve is perfect for anyone who needs to control and limit pressure in hydraulic systems. It’s ideal for agricultural or industrial machinery, like construction equipment, hydraulic presses, and injection molding machines.	View on Amazon (paid link)
Timsec 2-Pack Thermal Release Valve for Pressure Washer Pumps	This Timsec 2-Pack Thermal Release Valve is perfect for anyone with a pressure washer who wants to prevent pump overheating. It’s easy to install and works with many popular brands.	View on Amazon (paid link)
Stens 758-619 Thermal Relief Valve Compatible With/Replacement For General Pump 100558, 1/2″ Inlet, Max Temperature 140°F, Temperature 140°F	This thermal relief valve is perfect for anyone needing a reliable replacement for their General Pump. It’s easy to install and works great for systems with a 1/2″ inlet and temperatures up to 140°F.	View on Amazon (paid link)
7101359 Thermal Relief Valve for Gas Powered Pressure Washer Pumps	This thermal relief valve is perfect for anyone with a gas-powered pressure washer who wants to prevent damage and keep their machine running smoothly. It’s easy to install and works with most models, making it a must-have for DIY enthusiasts and professionals alike.	View on Amazon (paid link)
General Pump 100723 Cold Water Safety Relief Valve – 6 GPM, 6000 PSI	This valve is perfect for workers who run high pressure pumps. It keeps your system safe from pressure spikes.	View on Amazon (paid link)
Pressure Relief Valve for Sprayer Safety Valve Replacement 3-8L Pump Parts	This fit part helps garden users fix pumps. It helps farm folks keep tanks safe.	View on Amazon (paid link)
Thermal Relief Valve, Thread Width Measures 7/8″ Equal to 1/2 NPT-M	Shield your pressure washer pump from hot water damage with this solid brass valve. Only buy this valve if your fitting measures about 7/8 of an inch.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 Relief Valve Pumps handpicked for performance, durability, and value. Each product is expert-reviewed and backed by customer feedback, ensuring you find the perfect fit for your needs. Whether you prioritize safety, efficiency, or affordability, this guide simplifies your choice and builds confidence in your decision.

1. 2 Pcs 7101359 Thermal Relief Valves for Simpson Cleaning 7101359

Protect your pressure washer with the 7101359 Thermal Relief Valves. This 2-piece set is perfect for Simpson and other brands. It’s a must-have for long-lasting performance.

Prevent thermal damage to your pump with these high-quality brass valves. They release hot water and allow cold water to enter, keeping your washer safe.

Easy to install and built to last, these valves save you time and money. The super value set ensures you’re always prepared for replacements.

Pros	Cons
Perfect fit for most high-pressure washers with 1/4-inch NPT inlet. Protects your pump from thermal damage, extending its life. Durable brass construction ensures long-term, reliable performance. Easy to install, minimizing downtime and hassle. Great value with 2 pieces for daily replacement needs.	May not fit every pump type Needs proper installation to stop leaks Short lifespan compared to originals

Perfect For:

This product is perfect for anyone with a high-pressure washer needing reliable thermal protection. It’s easy to install and saves money in the long run.

Ready to Purchase?

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2. Merrill MFG PRVNL75100 3/4″ Lead-Free Brass Pressure Relief Valve, 100 PSI Cold Water Safety Valve for Well Tank, Pump & Plumbing Systems, 3/4″ NPT No-Lead Water System Protection Valve

Stop damage caused by water pressure spikes. This valve guards your well tank.
It uses lead free brass material. It is IAMPO certified for safety. It fits 3/4 inch pipe connections.

Pros	Cons
Protects against excessive pressure in cold water systems. Lead-free brass ensures safe, certified water protection. Easy installation with 3/4″ NPT connections. Durable stainless steel springs for long-lasting performance.	Not for hot water – Only works with cold water systems. Health warning – Contains chemicals linked to cancer risks. Limited use – No water heaters allowed, restricts installation options.

Perfect For:

Home owners must guard their water system. This unit stops high pressure damage.

Ready to Purchase?

View Price on Amazon (paid link)

3. 98209803 High Flow Manual Air Relief Valve for Pool and Spa Filter

The 98209803 High Flow Manual Air Relief Valve is perfect for pool and spa filters. It fits many popular models, making it a great replacement part. This valve helps release air easily, keeping your filter working well.

Made from high-quality plastic and rubber, it’s durable and leak-free. Installation is simple and tool-free, so you can replace it quickly.

Pros	Cons
Fits many pool and spa filter models perfectly. Easy to install and use, no tools needed. Durable materials resist wear, leaks, and corrosion. Reliable air release for better filter performance.	No pressure gauge included for testing filter pressure. Plastic material may not suit all heavy-duty pool environments. Manual operation required for air release, no automatic feature.

Perfect For:

Pool owners fix air in filters with this easy valve. It fits Warrior and EasyClean brands.

Ready to Purchase?

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4. Wovnet Adjustable Aluminum Pressure Relief Valve, 20 Gpm; 3000 Psi; #8 Sae (3/4-16 Orb), Hydraulic Pressure Control Valve for Systems and Pumps

The Wovnet Adjustable Aluminum Pressure Relief Valve protects your hydraulic systems from over-pressurizing. Keep your equipment running safely and smoothly with this high-quality aluminum alloy valve.

Limit maximum pressure to maintain system integrity and equipment safety. Protect your valuable machinery from sudden pressure spikes. Act quickly to prevent potential damage with fast, reliable performance.

Your demanding machinery deserves the best valve for maximum efficiency. This durable aluminum valve ensures long-term reliability even in harsh conditions. Trust Wovnet to power your hydraulic systems with confidence.

Pros	Cons
Adjustable pressure relief for precise control in hydraulic systems. Durable aluminum alloy ensures long-lasting performance. Protects hydraulic systems from excessive pressure damage. Versatile use in agricultural and industrial machinery.	Compatibility check needed before buying, may not fit all systems. No installation tools included, requires extra purchases. Limited to 20 GPM, not suitable for high-flow applications.

Perfect For:

This Wovnet Adjustable Aluminum Pressure Relief Valve is perfect for anyone who needs to control and limit pressure in hydraulic systems. It’s ideal for agricultural or industrial machinery, like construction equipment, hydraulic presses, and injection molding machines.

Ready to Purchase?

View Price on Amazon (paid link)

5. Timsec 2-Pack Thermal Release Valve for Pressure Washer Pumps

Keep your pressure washer pump safe with the Timsec 2-Pack Thermal Release Valve. This heavy-duty brass valve prevents overheating by releasing hot water when the temperature hits 145°F. It’s easy to install with a 1/4″ NPT thread and works with many popular brands.

This valve is durable and resistant to oil and corrosion. It’s a must-have replacement part for keeping your pressure washer running smoothly.

Pros	Cons
Prevents pump overheating with automatic cooling. Durable brass build resists oil and corrosion. Fits many pressure washer brands easily. Simple install with 1/4″ NPT thread.	Melts at 145°F and stops working Needs 1/4-inch NPT threads only Causes messy hot water spray

Perfect For:

This Timsec 2-Pack Thermal Release Valve is perfect for anyone with a pressure washer who wants to prevent pump overheating. It’s easy to install and works with many popular brands.

Ready to Purchase?

View Price on Amazon (paid link)

6. Stens 758-619 Thermal Relief Valve Compatible With/Replacement For General Pump 100558, 1/2″ Inlet, Max Temperature 140°F, Temperature 140°F

The Stens 758-619 Thermal Relief Valve is a reliable replacement for General Pump 100558. It has a 1/2″ inlet and works well up to 140°F. This valve is easy to install and use.

It is sold on Amazon, making it convenient to purchase. The compact size (1.49 L x 1 W x 1 H inches) and light weight (0.09 pounds) make it easy to handle.

This valve is a great choice for your needs. It is durable and efficient, ensuring smooth operation. Get yours today and experience the difference.

Pros	Cons
Compact design fits easily in tight spaces. Lightweight at just 0.09 pounds for easy handling. Max temperature of 140°F ensures safety and reliability. Compatible with General Pump for seamless replacement.	Fits only General Pump models Made of light plastic May leak if fixed wrong

Perfect For:

This thermal relief valve is perfect for anyone needing a reliable replacement for their General Pump. It’s easy to install and works great for systems with a 1/2″ inlet and temperatures up to 140°F.

Ready to Purchase?

View Price on Amazon (paid link)

7. 7101359 Thermal Relief Valve for Gas Powered Pressure Washer Pumps

The 7101359 Thermal Relief Valve is a must-have replacement part for gas-powered pressure washer pumps. It prevents thermal damage to your equipment. This valve gets you back to cleaning fast.

It fits 1/4″ NPT and has a 1/2″ outer diameter. The valve is 1.7″ long and made of durable metal.

This part works with most pressure washers that have a 1/4″ NPT fitting. It handles a max inlet pressure of 200 PSI. The 7101359 Thermal Relief Valve ensures long-lasting performance for your projects.

Pros	Cons
Prevents thermal damage to your pressure washer’s internal parts. Fits most pumps with 1/4″ NPT for easy installation. Durable metal build ensures long-lasting performance. Quickly restores power to your washing projects.	Not universal, fits only 1/4″ NPT pressure washers. Limited max pressure of 200 PSI may not suit all pumps. No installation tools included, requires extra effort.

Perfect For:

This thermal relief valve is perfect for anyone with a gas-powered pressure washer who wants to prevent damage and keep their machine running smoothly. It’s easy to install and works with most models, making it a must-have for DIY enthusiasts and professionals alike.

Ready to Purchase?

View Price on Amazon (paid link)

8. General Pump 100723 Cold Water Safety Relief Valve – 6 GPM, 6000 PSI

The General Pump 100723 Cold Water Safety Relief Valve is a reliable safety solution for high-pressure systems. It handles 6 GPM and up to 6000 PSI, ensuring safe operation in demanding environments.

This valve is easy to use, fits any pump brand, and reduces noise compared to others. It works accurately across all pressures, with no spring adjustments needed.

Pros	Cons
High pressure relief from 2500-6000 PSI ensures safety. One model fits all pumps, no spring changes needed. Less noise, less chatter than other brands. Accurate performance across the full pressure range.	Noisy operation, despite claims of less “whistling”. Limited to cold water use only. Price may be higher than competitors.

Perfect For:

This valve is perfect for workers who run high pressure pumps. It keeps your system safe from pressure spikes.

Ready to Purchase?

View Price on Amazon (paid link)

9. Pressure Relief Valve for Sprayer Safety Valve Replacement 3-8L Pump Parts

This pressure relief valve keeps your sprayer safe by releasing extra pressure automatically. It prevents tank damage and protects you during use.

It’s a direct replacement for most 3L, 5L, and 8L sprayers. Easy to install and built to last, it works with garden, farm, and industrial sprayers.

Pros	Cons
Prevents tank rupture with automatic pressure release. Fits most 3-8L sprayers, easy replacement. Durable, leak-proof, and chemical-resistant design. Quick install, no special tools needed.	Not universal, may not fit all sprayer models. Single valve, no extra parts included in package. Manual install, requires basic tool use for replacement.

Perfect For:

This fit part helps garden users fix pumps. It helps farm folks keep tanks safe.

Ready to Purchase?

View Price on Amazon (paid link)

10. Thermal Relief Valve, Thread Width Measures 7/8″ Equal to 1/2 NPT-M

This Thermal Relief Valve protects your pressure washer pump from heat damage. It opens at 145°F to release hot water during bypass. The threads measure 7/8 inch, which equals 1/2 NPT-M.

Avoid returns by measuring correctly. 1/2 NPT does not mean 1/2 inch on a ruler. Use a US nickel to check—it’s nearly the same size as the threads.

Made of solid brass, this valve is durable and reliable. It fits 1/2 NPT thermal relief ports and comes with a 6-month warranty.

Pros	Cons
Solid brass build ensures durability and longevity. Protects pumps from heat damage at 145°F. Easy installation in any orientation for convenience. 6-month warranty offers hassle-free peace of mind.	Confusing thread size often leads to wrong orders. No directional vent requirement might cause installation doubts. Limited 6-month warranty compared to longer options.

Perfect For:

Shield your pressure washer pump from hot water damage with this solid brass valve. Only buy this valve if your fitting measures about 7/8 of an inch.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Relief valves keep your equipment safe and running smoothly. They prevent damage and save money by managing pressure. Choosing the right one ensures your systems stay protected.

Factors to Consider When Buying Relief Valves:
– Type of System: Match the valve to your equipment, like pressure washers, hydraulic systems, or pool filters.
– Material: Look for durable materials like brass, aluminum, or high-quality plastic for long-lasting use.
– Pressure Rating: Ensure the valve’s PSI rating matches your system’s needs to avoid over-pressurization.
– Temperature Range: Choose valves with the right temperature threshold to prevent thermal damage.
– Compatibility: Check if the valve fits your equipment’s thread size and connection type.
– Ease of Installation: Opt for valves that are easy to install to save time and effort.
– Certifications: Look for safety certifications like IAMPO for added reliability.
– Warranty: A warranty ensures peace of mind and protects your investment.

Engaging Experience:
Finding the perfect relief valve is simple. Start by identifying your system’s needs. Compare features like material, pressure rating, and compatibility. Read reviews to see how others use them. With the right valve, your equipment stays safe and efficient.