---
product_id: 14910665
title: "Watts USG-B-M2 3/8\" Under Sink Guardian Thermostatic Mixing Valve (0204141)"
brand: "watts"
price: "$169.62"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/14910665-watts-usg-b-m2-3-8-under-sink-guardian-thermostatic
store_origin: US
region: United States of America
---

# Lead-free construction Thermostatic control Tamper-proof design Watts USG-B-M2 3/8" Under Sink Guardian Thermostatic Mixing Valve (0204141)

**Brand:** watts
**Price:** $169.62
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate Your Plumbing Game with WattsUSG-B-M2!

## Quick Answers

- **What is this?** Watts USG-B-M2 3/8" Under Sink Guardian Thermostatic Mixing Valve (0204141) by watts
- **How much does it cost?** $169.62 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/14910665-watts-usg-b-m2-3-8-under-sink-guardian-thermostatic)

## Best For

- watts enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Friendly:** Constructed from lead-free brass, promoting health and sustainability.
- • **Safety First:** Equipped with a tamper-resistant locking nut to ensure safe and reliable operation.
- • **Smart Mixing:** Innovative thermostatic mixing valve prevents hot and cold water cross-contamination.
- • **Compact Design:** Lightweight and compact, fitting seamlessly under your sink without taking up space.
- • **Versatile Application:** Designed for three-port applications, making it adaptable to various plumbing setups.

## Description

Watts USG-B-M2 3/8" Under Sink Guardian Thermostatic Mixing Valve (0204141)

## Features

- Lead Free Brass body construction
- Includes tamper resistant locking nut to prevent accidental misadjustments, Built in check valves prevent migration of hot water to cold and cold water to hot water piping, Provided with cap for three port application

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Bronze, Brass |
| Brand | Watts |
| Exterior Finish | Bronze |
| Inlet Connection Type | Compression |
| Outlet Connection Type | Compression |
| Number of Ports | 4 |
| Specification Met | ASSE 1070 |
| Valve Type | Thermostatic Mixing Valve |
| Global Trade Identification Number | 00098268548471 |
| Manufacturer | Watts |
| UPC | 098268548471 |
| Part Number | USG-B-M2 3/8" |
| Item Weight | 12.3 ounces |
| Package Dimensions | 3.98 x 3.39 x 2.6 inches |
| Item model number | USG-B-M2 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Bronze, Brass
- **Brand:** Watts
- **Exterior Finish:** Bronze
- **Inlet Connection Type:** Compression
- **Outlet Connection Type:** Compression
- **Number of Ports:** 4
- **Specification Met:** ASSE 1070
- **Valve Type:** Thermostatic Mixing Valve
- **Global Trade Identification Number:** 00098268548471
- **Manufacturer:** Watts

## Images

![Watts USG-B-M2 3/8" Under Sink Guardian Thermostatic Mixing Valve (0204141) - Image 1](https://m.media-amazon.com/images/I/61e07W5s+eL.jpg)

## Questions & Answers

**Q: is this product lead free**
A: Yes

**Q: Does this valve has total flow shut-off if cold supply fails? similar to the cash acme thermostatic valves.**
A: Yes it is an ASSE 1070 valve- to get that rating a valve has to provide that protection.

**Q: is the kohler  k 99799 na  the same mixing valve as watts usg b m2 3/8 mixing valve/?**
A: Looking at them they seem the same. Hot and cold supply with mixing of the two to have a controlled warm water for your hot faucet and maintain a cold 
Pass through for the cold faucet.

**Q: Can you asjust the temperature?**
A: Yes.

## Frequently Bought Together

- Watts USG-B-M2 3/8" Under Sink Guardian Thermostatic Mixing Valve (0204141)
- Faucet Supply Lines 3/8" to 3/8" Female Compression Thread 1 Pair, ARCORA 9“ Faucet Hose Connects Kitchen Bathroom Sink to Water Supply

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-27*