---
product_id: 19923408
title: "Sea 66100 100XL-4 3/4\" 150 Psi 100Xl-4 T & P Relief Valve"
brand: "watts"
price: "157.91 DT"
currency: TND
in_stock: true
reviews_count: 10
category: "Watts"
url: https://www.desertcart.tn/products/19923408-sea-66100-100xl-4-3-4-150-psi-100xl-4
store_origin: TN
region: Tunisia
---

# 3/4" NPT threaded connection 150 psi max pressure Durable bronze construction Sea 66100 100XL-4 3/4" 150 Psi 100Xl-4 T & P Relief Valve

**Brand:** watts
**Price:** 157.91 DT
**Availability:** ✅ In Stock

## Summary

> 🛠️ Upgrade your system with Watts — where safety meets precision!

## Quick Answers

- **What is this?** Sea 66100 100XL-4 3/4" 150 Psi 100Xl-4 T & P Relief Valve by watts
- **How much does it cost?** 157.91 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/19923408-sea-66100-100xl-4-3-4-150-psi-100xl-4)

## 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

- • **Built to Last:** Robust bronze body engineered in the USA
- • **Compact & Efficient:** Streamlined 1x1 inch design fits discreetly in any setup
- • **Trusted Performance:** Highly rated with 4.7 stars from 164 professionals
- • **Seamless Threaded Fit:** Standard 3/4" NPT connection for easy OEM replacement
- • **Precision Pressure Control:** Reliable 150 psi relief for ultimate safety

## Overview

The Watts Sea 66100 100XL-4 is a premium 3/4" bronze T&P relief valve designed for water heaters, offering a maximum operating pressure of 150 psi. Made in the USA, it features a threaded NPT connection for seamless OEM replacement, ensuring reliable pressure relief and long-lasting durability. With a compact design and strong customer approval (4.7/5 stars), it’s the go-to choice for professionals seeking safety and performance.

## Description

OEM Replacement Parts / Equipment

Review: Good - Worked great. Would buy again.
Review: Replaced the relief and it's working well. - This was the replacement that I needed and is working well. Tks I would recommend this item.

## Features

- Made in United States

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002QYIRN0 |
| Best Sellers Rank | #57,397 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #33 in Relief Valves |
| Brand | Watts |
| Brand Name | Watts |
| Connector Type | Threaded |
| Customer Reviews | 4.7 out of 5 stars 164 Reviews |
| Exterior Finish | Bronze |
| Included Components | Watts Sea 66100 100XL-4 3/4" 150 Psi 100Xl-4 T & P Relief Valve |
| Item Dimensions | 1 x 1 x 1 inches |
| Item Type Name | Watts Sea 66100 100XL-4 3/4" 150 Psi 100Xl-4 T & P Relief Valve |
| Item Weight | 4.8 ounces |
| Item dimensions L x W x H | 1 x 1 x 1 inches |
| Manufacturer | Watts Sea |
| Manufacturer Part Number | 66100100XL4 |
| Manufacturer Warranty Description | Warranty |
| Material | Bronze |
| Material Type | Bronze |
| Maximum Operating Pressure | 150 psi |
| Maximum Pressure | 150 psi |
| Model Number | 66100 100XL-4 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 100 |
| Number of Ports | 2 |
| Outlet Connection Size | 0.75 inches |
| Outlet Connection Type | FNPT |
| Set Name | 100XL-4 |
| Size | No Size |
| Specification Met | oem |
| Thread Size | 3/4 in |
| Thread Type | NPT |
| UPC | 098268000016 |
| Unit Count | 1 Count |
| Valve Type | Pressure Relief Valve |

## Product Details

- **Brand:** Watts
- **Exterior Finish:** Bronze
- **Item dimensions L x W x H:** 1 x 1 x 1 inches
- **Material:** Bronze
- **Maximum Operating Pressure:** 150 psi
- **Number of Packs:** 1
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.75 inches
- **Outlet Connection Type:** FNPT
- **Specification Met:** oem

## Images

![Sea 66100 100XL-4 3/4" 150 Psi 100Xl-4 T & P Relief Valve - Image 1](https://m.media-amazon.com/images/I/41mtygV48vL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by C***N on September 2, 2026*

Worked great. Would buy again.

### ⭐⭐⭐⭐⭐ Replaced the relief and it's working well.
*by L***Y on August 23, 2026*

This was the replacement that I needed and is working well. Tks I would recommend this item.

### ⭐⭐⭐⭐⭐ perfect for my RV water heater
*by G***. on July 11, 2026*

It was a perfect fit for my RV water heater and it doesn't leak

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- Watts Sea 66100 100XL-4 3/4" 150 Psi 100Xl-4 T & P Relief Valve
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**Shop now:** [https://www.desertcart.tn/products/19923408-sea-66100-100xl-4-3-4-150-psi-100xl-4](https://www.desertcart.tn/products/19923408-sea-66100-100xl-4-3-4-150-psi-100xl-4)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-18*