---
product_id: 112904436
title: "P.A. Unloader Valve Pressure Washer Pump 4500 PSI 21 GPM VB 85/310"
brand: "pa"
price: "$853"
currency: NZD
in_stock: true
reviews_count: 2
url: https://www.desertcart.nz/products/112904436-p-a-unloader-valve-pressure-washer-pump-4500-psi-21
store_origin: NZ
region: New Zealand
---

# 4500 PSI max pressure 195°F max temperature 21 GPM max flow rate P.A. Unloader Valve Pressure Washer Pump 4500 PSI 21 GPM VB 85/310

**Brand:** pa
**Price:** $853
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your cleaning game with Italian-engineered power and precision!

## Quick Answers

- **What is this?** P.A. Unloader Valve Pressure Washer Pump 4500 PSI 21 GPM VB 85/310 by pa
- **How much does it cost?** $853 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/112904436-p-a-unloader-valve-pressure-washer-pump-4500-psi-21)

## Best For

- pa enthusiasts

## Why This Product

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

## Key Features

- • **High Flow Efficiency:** 21 GPM flow rate ensures rapid, thorough washing with less downtime.
- • **Heat-Resistant Durability:** Operates safely at temperatures up to 195°F, perfect for tough jobs.
- • **Safe & Secure Connections:** O-ring fittings upstream of threads prevent dangerous ejections under overpressure.
- • **Engineered for Reliability:** Dynamic Teflon seals and anti-rotation piston design minimize wear and extend pump life.
- • **Unmatched Power & Precision:** Delivers up to 4500 PSI for industrial-grade cleaning performance.

## Overview

The P.A. Unloader Valve Pressure Washer Pump is a robust, Italian-made replacement pump rated for a maximum pressure of 4500 PSI and a flow rate of 21 GPM. Designed to handle recycled water and strong detergents, it features advanced Teflon dynamic seals, an anti-rotation piston, and safety-focused O-ring fittings to ensure durability and secure operation under high pressure and temperatures up to 195°F.

## Description

60.0485.65 1/2”NPT F Blue springDynamic seals made up of O-ring and runner in teflon. Optimized internal passages that guarantee reduced pressure loss.Antirotation device of the piston positioned inside the valve and obtained by an hexagonal sector of the piston itself. O-rings of the fittings positioned upstream to the thread : no risk of fittings ejected in case of overpressure. Double feed connection.replacement for CAT 7542 Regulating Unloader.

## Features

- Rated pressure: 4050 psi (280 bar), Max. permissible pressure: 4500 psi (310 bar), Max. flow rate: 21 US gpm (80 L/min), Max. temperature: 195 °F (90 °C)
- Made in Italy. Suitable for recycled water and strong detergents.
- Replacement Unloader Valvefor AR Comet Cat pump BE, General Pump YU21405 - GP2124 - CAT 7542
- 7x5 toll-free phone, email and live chat support from Canada

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | PA |
| Inlet Connection Size | 0.5 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Outlet Connection Type | FNPT |
| Maximum Operating Pressure | 4500 Pound per Square Inch |
| Number of Ports | 2 |
| Outlet Connection Size | 0.5 Inches |
| Manufacturer | PA Spa |
| UPC | 748347675771 |
| Part Number | 60.0485.65 |
| Item Weight | 3 pounds |
| Package Dimensions | 8 x 5 x 5 inches |
| Item model number | 60.0485.65 |
| Is Discontinued By Manufacturer | No |
| Size | 0.5 inches |
| Power Source | corded-electric |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** PA
- **Inlet Connection Size:** 0.5 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Outlet Connection Type:** FNPT
- **Maximum Operating Pressure:** 4500 Pound per Square Inch
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.5 Inches
- **Manufacturer:** PA Spa
- **UPC:** 748347675771

## Images

![P.A. Unloader Valve Pressure Washer Pump 4500 PSI 21 GPM VB 85/310 - Image 1](https://m.media-amazon.com/images/I/61yRW5G6HqL.jpg)
![P.A. Unloader Valve Pressure Washer Pump 4500 PSI 21 GPM VB 85/310 - Image 2](https://m.media-amazon.com/images/I/61wvb-LxuDL.jpg)
![P.A. Unloader Valve Pressure Washer Pump 4500 PSI 21 GPM VB 85/310 - Image 3](https://m.media-amazon.com/images/I/81otM5Wq3jL.jpg)
![P.A. Unloader Valve Pressure Washer Pump 4500 PSI 21 GPM VB 85/310 - Image 4](https://m.media-amazon.com/images/I/81YuMAEdHrL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Direct replacement
*by A***R on July 17, 2019*

Perfect

### ⭐⭐⭐⭐⭐ dumper valve work. My commercial carpet cleaner dumper valve had rust in it. Perfect fit
*by J***N on May 18, 2023*

Use the dumper valve for my commercial extraction carpet cleaner. Thank you part pit great

## Frequently Bought Together

- P.A. Unloader Valve Pressure Washer Pump 4500 PSI 21 GPM VB 85/310
- CARBO Instruments Stainless Steel Pressure Gauge Dual Display (0-2000 psi/kPa) - 2 1-2" Glycerine Liquid Filled Water Air Oil Gas Gauge with Polycarbonate Lens & Brass Connection -1/4" NPT Lower Mount

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**Shop now:** [https://www.desertcart.nz/products/112904436-p-a-unloader-valve-pressure-washer-pump-4500-psi-21](https://www.desertcart.nz/products/112904436-p-a-unloader-valve-pressure-washer-pump-4500-psi-21)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-16*