---
product_id: 19923408
title: "Watts Sea 66100 100XL-4 3/4\" 150 Psi 100Xl-4 T & P Relief Valve"
brand: "watts"
price: "R1417"
currency: ZAR
in_stock: true
category: "Watts"
url: https://www.desertcart.co.za/products/19923408-watts-sea-66100-100xl-4-3-4-150-psi-100xl
store_origin: ZA
region: South Africa
---

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

**Brand:** watts
**Price:** R1417
**Availability:** ✅ In Stock

## Summary

> 🛠️ Secure your system with Watts Sea’s precision relief valve — safety never looked this sleek!

## Quick Answers

- **What is this?** Watts Sea 66100 100XL-4 3/4" 150 Psi 100Xl-4 T & P Relief Valve by watts
- **How much does it cost?** R1417 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/19923408-watts-sea-66100-100xl-4-3-4-150-psi-100xl)

## 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

- • **Seamless OEM Fit:** Exact replacement ensures hassle-free installation
- • **Robust Bronze Build:** Corrosion-resistant for long-lasting performance
- • **Compact & Lightweight:** 1x1 inch, 4.8 oz design fits tight spaces effortlessly
- • **Trusted Brand Quality:** Watts Sea’s proven reliability with 4.7-star rating
- • **Precision Pressure Control:** Reliable 150 psi relief for ultimate safety

## Overview

The Watts Sea 66100 100XL-4 is a premium 3/4" bronze pressure relief valve rated for 150 psi, designed as an exact OEM replacement. Compact and durable, it features NPT threaded connections for easy installation and is highly rated for reliability and performance in water heater safety applications.

## Description

OEM Replacement Parts / Equipment

## Features

- Made in United States

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002QYIRN0 |
| Best Sellers Rank | #74,151 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #47 in Relief Valves |
| Brand | Watts |
| Brand Name | Watts |
| Connector Type | Threaded |
| Customer Reviews | 4.7 out of 5 stars 165 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

![Watts 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)

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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.co.za/products/19923408-watts-sea-66100-100xl-4-3-4-150-psi-100xl](https://www.desertcart.co.za/products/19923408-watts-sea-66100-100xl-4-3-4-150-psi-100xl)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-10-02*