---
product_id: 120189585
title: "25 Ft 3/8\" x 5/8\" Line Set for Ductless Mini Split Air Conditioner Heat Pump Systems"
brand: "ductlessaire"
price: "FREE"
currency: EUR
in_stock: false
reviews_count: 2
url: https://www.desertcart.fi/products/120189585-25-ft-3-8-x-5-8-line-set-ductless
store_origin: FI
region: Finland
---

# 3/8" & 5/8" Sizes 25 Ft Length ASTM B280 Certified 25 Ft 3/8" x 5/8" Line Set for Ductless Mini Split Air Conditioner Heat Pump Systems

**Brand:** ductlessaire
**Price:** FREE
**Availability:** ❌ Out of Stock

## Summary

> 🔝 Elevate Your Comfort Game!

## Quick Answers

- **What is this?** 25 Ft 3/8" x 5/8" Line Set for Ductless Mini Split Air Conditioner Heat Pump Systems by ductlessaire
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/120189585-25-ft-3-8-x-5-8-line-set-ductless)

## Best For

- ductlessaire enthusiasts

## Why This Product

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

## Key Features

- • **Perfect Fit:** Designed to fit all mini split systems requiring 3/8"-5/8" line sets.
- • **Seamless Quality:** Crafted from high-grade ASTM B280 copper for durability.
- • **Reliable Manufacturer:** Backed by DuctlessAire, a trusted name in HVAC solutions.
- • **Pre-Flared Convenience:** Pre-flared with nuts for easy installation and hassle-free setup.
- • **Insulated for Efficiency:** 3/8" thick insulation ensures optimal performance and energy savings.

## Overview

The CopperTwin 25 Ft 3/8" x 5/8" Line Set is a high-quality, ASTM B280 certified copper solution designed for ductless mini split air conditioner and heat pump systems. With pre-flared ends and robust insulation, it ensures efficient performance and easy installation, making it a must-have for any HVAC professional.

## Description

Full description not available

## Features

- CopperTwin 25 Ft 3/8-5/8 High Quality ASTM B280 Copper Line Set for Ductless Mini Split Air Conditioner and Heat Pump Systems Insulated Pre-Flared with Nuts
- Length: 25 Ft. Liquid Line: 3/8"; Suction Line: 5/8"; Thickness of Insulation: 3/8"; Pre-Flared with Nuts
- CopperTwin manufactured to the requirements of ASTM B280 - Standard Specification for Seamless Copper Pipe
- Fits all mini split systems that require 3/8-5/8 Line Set (Please verify line set sizing with equipment data sheet)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | DuctlessAire |
| Item model number | D143838-25-MS-TC-16/6 |
| Is Discontinued By Manufacturer | No |
| Color | Copper |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![25 Ft 3/8" x 5/8" Line Set for Ductless Mini Split Air Conditioner Heat Pump Systems - Image 1](https://m.media-amazon.com/images/I/81EYmHHjWpL.jpg)
![25 Ft 3/8" x 5/8" Line Set for Ductless Mini Split Air Conditioner Heat Pump Systems - Image 2](https://m.media-amazon.com/images/I/819veCGEFRL.jpg)
![25 Ft 3/8" x 5/8" Line Set for Ductless Mini Split Air Conditioner Heat Pump Systems - Image 3](https://m.media-amazon.com/images/I/61Ws5K-KNLL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Worked on my Mini-split.
  

*by D***G on Reviewed in the United States on February 5, 2021*

Worked on my mini-split.  It's copper so be prepared to do the bending cautiously, but if your smart and don't try to overdo it you won't have any problems. It's value is better than most, the insulation is great because it has a tough exterior and is not just the insulation. My two complaints are they are joined together, so you have to split them to get the appropriate bends you need, and they don't come with end caps on them so you will have to fashion them with electrical or duct tape and then you have to clean the ends one the line set is run. But the quality insulation and reasonable price makes up for that.

### ⭐⭐ 2.0 out of 5 stars







  
  
    Have a flaring tool handy
  

*by B***N on Reviewed in the United States on July 4, 2019*

I bought 2 of these. Both had issues with the flares on the 5/8 side. I had to cut all of them off and reflare. The line are still a good value but expect to re-flare the ends

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**Shop now:** [https://www.desertcart.fi/products/120189585-25-ft-3-8-x-5-8-line-set-ductless](https://www.desertcart.fi/products/120189585-25-ft-3-8-x-5-8-line-set-ductless)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-11*