---
product_id: 60717041
title: "General Pump Trapped Pressure Unloader Valve - 21 GPM - 4050 PSI | NEW improved design! - Reduced pressure loss, easier gun operation - Extremely reliable"
brand: "general pump"
price: "€ 231.32"
currency: EUR
in_stock: true
reviews_count: 8
category: "General Pump"
url: https://www.desertcart.pt/products/60717041-general-pump-trapped-pressure-unloader-valve-21-gpm-4050-psi
store_origin: PT
region: Portugal
---

# 4050 PSI max pressure 1/2" NPT threaded connections 21 GPM flow rate General Pump Trapped Pressure Unloader Valve - 21 GPM - 4050 PSI | NEW improved design! - Reduced pressure loss, easier gun operation - Extremely reliable

**Brand:** general pump
**Price:** € 231.32
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your pressure washer game with unmatched power and durability!

## Quick Answers

- **What is this?** General Pump Trapped Pressure Unloader Valve - 21 GPM - 4050 PSI | NEW improved design! - Reduced pressure loss, easier gun operation - Extremely reliable by general pump
- **How much does it cost?** € 231.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/60717041-general-pump-trapped-pressure-unloader-valve-21-gpm-4050-psi)

## Best For

- general pump enthusiasts

## Why This Product

- Trusted general pump brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted from durable stainless steel to withstand high pressure and temperature up to 200°F.
- • **Trusted Quality:** Highly rated with 4.8 stars and praised as the market’s best unloader valve—no compromises.
- • **Precision Engineering:** New improved design reduces pressure loss for smoother, easier gun operation.
- • **Power-Packed Performance:** Delivers a robust 21 gallons per minute for maximum cleaning efficiency.
- • **Pump Protection Champion:** Optimized to extend your pump’s lifespan by supporting full potential without strain.

## Overview

The General Pump Trapped Pressure Unloader Valve YU21405 is a high-performance accessory designed for pressure washers, featuring a 21 GPM flow rate and a maximum pressure rating of 4050 PSI. Made from stainless steel with 1/2" NPT threaded connections, it offers a new improved design that reduces pressure loss and enhances gun operation. Trusted by professionals for its reliability and pump protection, this valve supports temperatures up to 200°F and meets industry standards like ASME and ASTM.

## Description

General Pump Unloader YU21405. 21 GPM. 4050 PSI Rated Pressure. 200 F Max Temp. Inlet:(2) 1/2" NPT-F Outlet: 1/2" NPT-F Bypass:(2) 1/2" NPT-F Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.

Review: gp are good products - good quality, not from china
Review: Best in the market - I feel like this unloader is the bar none the best if you’re buying another unloader, you’re wasting your money this thing will give your machine 10 times more power and it will last your pump longer cause it’s made properly support your pump to its full potential

## Features

- New Improved Design
- Unloader Valve 4500 PSI 21 GPM 1/2" NPT
- Valve

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01M1DXN7X |
| Best Sellers Rank | #88,457 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,038 in Pressure Washer Accessories |
| Brand | General Pump |
| Brand Name | General Pump |
| Connector Type | Threaded |
| Customer Reviews | 4.8 out of 5 stars 56 Reviews |
| Exterior Finish | Stainless Steel |
| Inlet Connection Size | 0.5 inches |
| Inlet Connection Type | National Pipe Tapered |
| Item Dimensions | 7 x 8 x 3 inches |
| Item Highlight | NEW improved design! - Reduced pressure loss, easier gun operation - Extremely reliable |
| Item dimensions L x W x H | 7 x 8 x 3 inches |
| Manufacturer | General Pump |
| Manufacturer Part Number | YU21405 |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Maximum Pressure | 4050 psi |
| Model Number | YU21405 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 0.5 inches |
| Outlet Connection Type | NPT |
| Size | 2.7 liters |
| Specification Met | ASME, ASTM, MSS SP 72 |
| Thread Size | 1/2 inches |
| Thread Type | National Pipe Tapered |
| UPC | 682491064305 |
| Unit Count | 1 Count |
| Valve Type | Pressure Relief Valve |

## Product Details

- **Brand:** General Pump
- **Exterior Finish:** Stainless Steel
- **Inlet Connection Size:** 0.5 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Item dimensions L x W x H:** 7 x 8 x 3 inches
- **Material:** Stainless Steel
- **Maximum Operating Pressure:** 4050 Pound per Square Inch
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.5 Inches
- **Outlet Connection Type:** NPT

## Images

![General Pump Trapped Pressure Unloader Valve - 21 GPM - 4050 PSI | NEW improved design! - Reduced pressure loss, easier gun operation - Extremely reliable - Image 1](https://m.media-amazon.com/images/I/51hH4zYIo5L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ gp are good products
*by R***. on May 27, 2025*

good quality, not from china

### ⭐⭐⭐⭐⭐ Best in the market
*by J***H on June 4, 2023*

I feel like this unloader is the bar none the best if you’re buying another unloader, you’re wasting your money this thing will give your machine 10 times more power and it will last your pump longer cause it’s made properly support your pump to its full potential

### ⭐⭐⭐⭐⭐ Highly recommend for professional use.
*by M***Z on September 18, 2022*

This must be te most impressive unloader I have ever seen, massive robust heavy duty.

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**Shop now:** [https://www.desertcart.pt/products/60717041-general-pump-trapped-pressure-unloader-valve-21-gpm-4050-psi](https://www.desertcart.pt/products/60717041-general-pump-trapped-pressure-unloader-valve-21-gpm-4050-psi)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-15*