---
product_id: 71094449
title: "Ultimate Washer UW11-PW5D4S Thermal Relief Valve for Pressure Washers, Inlet 1/2-Inch Male, Pump Saver Device, Compatible with Karcher 91840130"
brand: "ultimate washer"
price: "$50.58"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/71094449-ultimate-washer-uw11-pw5d4s-thermal-relief-valve-for-pressure-washers
store_origin: US
region: United States of America
---

# Up to 8 GPM flow rate 1/2-inch MNPT universal fit Thermal relief at 140°F Ultimate Washer UW11-PW5D4S Thermal Relief Valve for Pressure Washers, Inlet 1/2-Inch Male, Pump Saver Device, Compatible with Karcher 91840130

**Brand:** ultimate washer
**Price:** $50.58
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your pressure washer cool and your workflow hotter! 🔧

## Quick Answers

- **What is this?** Ultimate Washer UW11-PW5D4S Thermal Relief Valve for Pressure Washers, Inlet 1/2-Inch Male, Pump Saver Device, Compatible with Karcher 91840130 by ultimate washer
- **How much does it cost?** $50.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/71094449-ultimate-washer-uw11-pw5d4s-thermal-relief-valve-for-pressure-washers)

## Best For

- ultimate washer enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** Weighs just 2.6 oz with a sleek design that fits seamlessly into your setup
- • **Automatic Thermal Reset:** Resets at 115°F to keep your washer running smoothly without interruption
- • **Universal Compatibility:** Fits all 1/2-inch bypass lines, including top Karcher models
- • **Pump Protection, Perfected:** Prevents costly pump overheating by releasing hot water above 140°F
- • **Durable Build, Lasting Performance:** Brass and plastic construction ensures long-term reliability under pressure

## Overview

The Ultimate Washer UW11-PW5D4S Thermal Relief Valve safeguards your pressure washer pump by automatically releasing hot water when temperatures exceed 140°F, preventing seal failure and costly repairs. Designed with durable brass and plastic, it fits universally on 1/2-inch bypass lines and resets at 115°F to maintain optimal pump performance. Compatible with popular Karcher models, this compact valve supports up to 8 GPM flow, ensuring your equipment stays cool and efficient during extended use.

## Description

Ultimate Washer UW11-PW5D4S 1/2 inch Male NPT Pump Thermal Relief Valve up to 8 GPM Pressure Power Washer Pump keeps pressure washer pumps operating in a safe range to prevent overheating.When water temperatures reach above 145 degree F, pump seals may fail.The thermal relief valve opens to release hot water and allow cold water to enter the pump so it continues to operate at a safe temperature. Should the pump ever overheat, the thermal relief valves must be replaced. 1/2" MNPT Thermal Relief ValveUniversally Fits 1/2" Lines, Compatible with Karcher Models G4000OH, G4000RHv2, HD3.1/31Pv2, HD4.0/36Pv2Max Temp: 145 degree FPump Saver Device

## Features

- Thermal Relief Valve is Used to Prevent a Pressure Washer Pump from Overheating if Running in Bypass for Extended Periods of Time
- Valve Opens at 140 Degree Discharging Hot Water from Pump and Allows Cool Water in; Automatically Resets at Cool Down to 115 Degree F
- 1/2" MPT (valve is mounted in bypass line); 1/8" FPT Discharge Side
- Material: Brass and Plastic (flow directing cap)
- Universally Fits 1/2" Bypass Lines

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Brass, Plastic |
| Brand | Ultimate Washer |
| Exterior Finish | Plastic |
| Inlet Connection Size | 0.5 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Outlet Connection Type | MNPT |
| Number of Ports | 2 |
| Specification Met | UL |
| Manufacturer | Ultimate Washer |
| UPC | 852090007922 |
| Part Number | 4336552405 |
| Item Weight | 2.6 ounces |
| Package Dimensions | 4.06 x 2.76 x 1.22 inches |
| Item model number | 4336552405 |
| Is Discontinued By Manufacturer | No |
| Power Source | corded-electric |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Brass, Plastic
- **Brand:** Ultimate Washer
- **Exterior Finish:** Plastic
- **Inlet Connection Size:** 0.5 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Outlet Connection Type:** MNPT
- **Number of Ports:** 2
- **Specification Met:** UL
- **Manufacturer:** Ultimate Washer
- **UPC:** 852090007922

## Images

![Ultimate Washer UW11-PW5D4S Thermal Relief Valve for Pressure Washers, Inlet 1/2-Inch Male, Pump Saver Device, Compatible with Karcher 91840130 - Image 1](https://m.media-amazon.com/images/I/71spjP7BPfL.jpg)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-06*