---
product_id: 15839480
title: "Thermwell Frost King ELB78H Self-Sealing 3/8-Inch Wall for Tees and Elbows, Elbow fits 3/4\" Copper Pipe, 1 Count (Pack of 1)"
brand: "thermwell"
price: "$11.49"
currency: USD
in_stock: true
reviews_count: 8
category: "Thermwell"
url: https://www.desertcart.us/products/15839480-thermwell-frost-king-elb78h-self-sealing-3-8-inch-wall
store_origin: US
region: United States of America
---

# Square Ends for Tight Fit Self-Sealing Polyethylene Foam 3/4" Copper Pipe Elbow Thermwell Frost King ELB78H Self-Sealing 3/8-Inch Wall for Tees and Elbows, Elbow fits 3/4" Copper Pipe, 1 Count (Pack of 1)

**Brand:** thermwell
**Price:** $11.49
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with Thermwell – where efficiency meets ease!

## Quick Answers

- **What is this?** Thermwell Frost King ELB78H Self-Sealing 3/8-Inch Wall for Tees and Elbows, Elbow fits 3/4" Copper Pipe, 1 Count (Pack of 1) by thermwell
- **How much does it cost?** $11.49 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/15839480-thermwell-frost-king-elb78h-self-sealing-3-8-inch-wall)

## Best For

- thermwell enthusiasts

## Why This Product

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

## Key Features

- • **Trusted by Pros:** Top-rated with 4.5 stars from 500+ users who demand reliability.
- • **Durable Copper Core:** Built to last with premium 3/4" copper pipe compatibility.
- • **Effortless Energy Saver:** Self-sealing foam locks in warmth, cutting your energy bills.
- • **Precision Fit Guarantee:** Square ends ensure a snug, leak-proof connection every time.
- • **Quick & Clean Installation:** Pre-slit design means no mess, no fuss—just peel and seal.

## Overview

The Thermwell Frost King ELB78H is a 3/4-inch copper pipe elbow insulated with pre-slit, self-sealing polyethylene foam. Designed for quick installation, its square ends provide a tight, energy-saving seal that reduces heat loss and lowers utility costs. Lightweight and durable, this elbow is a trusted choice for professional-grade plumbing efficiency.

## Description

Product Description 3/4-Inch Pipe Elbow. This elbow is made from pre-slit, tubular, polyethylene foam. This product is self-sealing and forms a tight seal when the protective paper is removed. The square ends ensure a perfectly, tight fit. Helps to save both energy and money. Manufacturer Contact Information 1-800-526-5265

Review: Quick and Easy to install. - Quick and easy install and does the job.
Review: Great for pipe elbow joints. - Needed these because Lowe’s didn’t have any.

## Features

- The product is manufactured in china
- 3/4-Inch Pipe Elbow
- Elbow Is Made From Pre-slit Tubular Polyethylene Foam
- Product Is Self-sealing, And Forms A Tight Seal When The Protective Paper Is Removed
- The Square Ends Ensure A Perfectly Tight Fit
- Helps To Save Both Energy, And Money

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001BZZ43Q |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #43,964 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,321 in Pipe Fittings |
| Brand | Thermwell |
| Color | Copper |
| Connector Type | Elbow |
| Customer Reviews | 4.5 4.5 out of 5 stars (536) |
| Date First Available | August 17, 2005 |
| Exterior Finish | Copper |
| Global Trade Identification Number | 00077578054810 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 0.5 ounces |
| Item dimensions L x W x H | 1.87 x 3.5 x 3.5 inches |
| Item model number | ELB78H |
| Manufacturer | THERMWELL PRODUCTS |
| Material | Copper |
| Number of Pieces | 1 |
| Part Number | ELB78H |
| Product Dimensions | 1.87 x 3.5 x 3.5 inches |
| Size | 1 Count (Pack of 1) |
| Thread Type | NPT |
| UPC | 077578054810 |

## Product Details

- **Brand:** Thermwell
- **Color:** Copper
- **Connector Type:** Elbow
- **Exterior Finish:** Copper
- **Item Weight:** 0.5 Ounces
- **Item dimensions L x W x H:** 1.87 x 3.5 x 3.5 inches
- **Material:** Copper
- **Number of Pieces:** 1
- **Size:** 1 Count (Pack of 1)
- **Thread Type:** NPT

## Images

![Thermwell Frost King ELB78H Self-Sealing 3/8-Inch Wall for Tees and Elbows, Elbow fits 3/4" Copper Pipe, 1 Count (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/71YTvv+zaAL.jpg)

## Questions & Answers

**Q: how many pieces/units does it include?**
A: It's a one piece elbow.

**Q: Are these elbows indoor-outdoor or only indoor?**
A: I installed these outdoors as part of the insulation for my air conditioner back in March (about 6 months ago.)  I wrapped all of it with Shurtape LS 300 HVAC Line Set Tape. Even though it gets direct sun for a couple of hours in the middle of each day, it all still looks like new.  They have not split at the 'elbow seam'.

**Q: Can this be used outdoors for air conditioning pipe?**
A: I used them on my air conditioning pipe; they worked well.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quick and Easy to install.
*by P***. on February 24, 2025*

Quick and easy install and does the job.

### ⭐⭐⭐⭐⭐ Great for pipe elbow joints.
*by K***Y on January 23, 2026*

Needed these because Lowe’s didn’t have any.

### ⭐⭐⭐⭐ Worked well
*by F***S on March 6, 2023*

It protected my pipe very good during a freeze. The price was great!

## Frequently Bought Together

- Thermwell Frost King ELB78H Self-Sealing 3/8-Inch Wall for Tees and Elbows, Elbow fits 3/4" Copper Pipe, 1 Count (Pack of 1)
- Duck Brand Foam Pipe Covers, Pipe Insulation Foam Tubes for Hot and Cold Water Pipes, Pre Slit and Self Sealing Adhesive Edge, 0.75 in. x 1 Ft., 6 Sticks Per Package, 6 Feet Total, Black
- Duck Brand Insulating Foam Pipe Covers, 0.75-Inch by 3-Feet, Pack of 4 Sticks, 1285241

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-17*