General Pump PLSR4HVNCV Unloader Valve – 10 GPM, 2600 PSI | Summary
The General Pump PLSR4HVNCV is a two-inlet unloader/relief valve built for high-performance systems, especially those using gasoline engines. Designed with a trapped pressure mechanism, it prevents back pressure during manual engine starts—a must-have for dependable power washing or car wash operations.
Built with corrosion-resistant brass and stainless steel internals, and featuring a blue spring and plastic pressure adjustment knob, this regulator ensures consistent performance in heavy-duty environments. It’s a popular choice for operators needing a reliable valve without an internal check valve.
10 GPM 2600 PSI General Pump Unloader Valve | Features
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Trapped pressure design for use with gasoline engines
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No check valve – optimal for systems that don’t require one
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Blue spring for up to 2600 PSI pressure control
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Brass, stainless steel, and Viton construction
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Plastic adjustment knob for quick fine-tuning
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Compact and easy-to-install in multiple setups
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Perfect for car wash systems and commercial pressure washers
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General Pump recommends using a safety relief device (not included)
| Specification | Details |
| Brand | General Pump |
| Part Number | PLSR4HVNCV |
| Max Flow | 10.0 GPM |
| Max Pressure | 2600 PSI |
| Max Temperature | 194°F |
| Inlet Ports | (2) 3/8" FNPT |
| Outlet Port | 3/8" FNPT |
| Bypass Port | 3/8" FNPT |
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