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DBJ-003
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DABUND
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Copper
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1M - 10M
Material
Color
Keywords
Application
25 ft 3/8" x 3/4" Mini Split Installation Kit for HVAC Systems
The 25 ft 3/8" x 3/4" Mini Split Installation Kit from Dabund is designed for ductless mini split air conditioners, heat pumps, VRF systems, and HVACR installation projects. The kit includes a pre-insulated copper line set and essential installation accessories to help contractors complete AC installation work faster and more efficiently.
Dabund has produced HVAC parts since 2008, including insulated copper pipes, mini split line sets, installation kits, aluminum pipes, drain hoses, wall pipes, covers, communication cables, and other HVAC accessories. This 25 ft installation kit is suitable for installers, wholesalers, distributors, and OEM buyers looking for a reliable mini split installation kit supplier.
What Is Included in the 25 ft Mini Split Installation Kit?
This 3/8" x 3/4" mini split installation kit is built for larger-capacity ductless air conditioning systems and HVAC installations where a 25 ft refrigerant line connection is required.
One set of insulated copper pipe: 3/8" + 3/4"
Length: 25 ft
Black rubber insulation or white PE insulation options
Pre-flared copper pipe ends with nuts
Communication wire cable
Drain hose, commonly 3 m
Wall pipe and wall cover
Other necessary mini split installation accessories
The copper pipe ends are flared and fitted with nuts, helping reduce installation time and improve on-site convenience for HVAC contractors.
Key Features of 25 ft 3/8" x 3/4" Mini Split Installation Kit
Pre-Insulated Copper Line Set
The kit includes a factory-insulated copper line set with a 3/8 inch liquid line and a 3/4 inch suction line. The insulation helps reduce energy loss, prevent condensation, and protect the copper pipe during long-term HVAC operation.
Flared Ends with Nuts for Easy Installation
Both copper pipe ends are flared and supplied with nuts, making the kit easier to connect to mini split indoor and outdoor units. This helps save labor time during air conditioner installation.
Multiple Insulation Options
Dabund can supply white PE insulation and black rubber insulation. White PE insulation thickness options include 3/8", 1/2", 3/4", 1", or 8mm, 9mm, 10mm, 13mm, 19mm, and 25.4mm. Black rubber insulation thickness options include 1/2", 3/4", 1", or 13mm, 17mm, 19mm, and 25.4mm.
Reliable Standards and Test Reports
The insulation can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 requirements. The copper pipe meets ASTM B280 and C12200 standards, supporting stable HVAC performance and long-term durability.
Factory-Direct HVAC Kit Supply
Dabund is a professional manufacturer of mini split installation kits with two factories, high monthly production capacity, sample support, and long-term export experience for global HVAC buyers.
Copper Tube and Insulation Performance
Copper Tube: ASTM B280 and C12200 DHP
The copper tube is manufactured for HVAC refrigerant line applications and supports efficient refrigerant flow, good thermal conductivity, corrosion resistance, and long service life.
High-Density Closed-Cell Insulation
The insulation uses high-density closed-cell polyethylene foam or black rubber material. It helps provide thermal insulation, moisture resistance, UV resistance, tear resistance, and stable operating performance.
Working temperature range: -40℃ to 120℃
Meets or exceeds ASTM C1427-07 requirements
UL94 flame-retardant performance
ASTM E84 smoke and fire performance
Superior tear resistance and UV resistance
Moisture and condensation protection
99.9% Pure Copper
Black Rubber Insulated Pipe
Flared Ends with Nuts
Features of Black Rubber Pipe Insulation Tubing
Black rubber pipe insulation is designed for HVAC copper line sets that require moisture control, heat preservation, flame-retardant performance, and long-term outdoor durability.
Material: black rubber insulation
Temperature range: -40℃ to 120℃
Better moisture condensation protection
Insulation layer and moisture-proof layer in one structure
No additional water vapor permeation protective layer required in many installations
Helps protect the copper pipe and keep the installation area tidy
Excellent Heat Preservation Insulation
The high-density closed-cell structure provides low thermal conductivity and stable temperature performance. It helps protect the copper liquid pipe even in cold outdoor conditions.
Eco-Friendly and Durable Material
The insulation material is designed to be corrosion-resistant, acid-resistant, alkali-resistant, and suitable for long-term HVAC installation environments.
Excellent Flame-Retardant Properties
The insulation material has good flame-retardant performance and is suitable for HVAC applications where temperature resistance and safety are important.
25 ft 3/8" x 3/4" Mini Split Installation Kit for HVACR Wholesalers
Dabund in-house tested mini split air conditioner kits are designed to make installation simpler and faster. The complete kit structure helps installers save time and reduce procurement complexity by combining the copper line set and key installation accessories in one package.
Available Mini Split Installation Kit Sizes
| Size | Length | Insulation Black Rubber | Flame Resistant |
| 1/4" + 3/8" | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4" + 1/2" | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/4" + 5/8" | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8" + 5/8" | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8" + 3/4" | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 1/2" + 3/4" | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
| 3/8" + 7/8" | 3m / 4m / 5m / 7m / 10m | 8mm / 9mm / 10mm / 13mm / 19mm / 25.4mm | M1 / B1 |
Mini Split Installation Kit Size Guide
| Kit Size | Typical Ton Range | Typical BTU Range | Common Application |
|---|---|---|---|
| 1/4" + 3/8" | 0.75–1.0 Ton | 9,000–12,000 BTU | Small mini split air conditioner |
| 1/4" + 1/2" | 1.5–2.0 Ton | 12,000–18,000 BTU | Residential mini split system |
| 1/4" + 5/8" | 2.0–2.5 Ton | 24,000–30,000 BTU | Medium split AC system |
| 3/8" + 5/8" | 3.0–4.0 Ton | 36,000–48,000 BTU | Large residential HVAC system |
| 3/8" + 3/4" | 4.5–6.0 Ton | 54,000–72,000 BTU | Commercial split AC installation |
| 3/8" + 7/8" | 6.0–8.0 Ton | 72,000–96,000 BTU | Large ductless HVAC system |
The 3/8" x 3/4" mini split installation kit is commonly used for larger-capacity split air conditioner installations around 4.5–6.0 tons or 54,000–72,000 BTU. Final line set selection should always follow the HVAC equipment manufacturer’s installation manual.
Why Choose Dabund Pipe Mini Split Installation Kit?
Professional HVAC Manufacturing Since 2008
Dabund manufactures mini split installation kits, insulated copper pipes, mini split line sets, aluminum pipes, and HVAC parts. The company has long-term experience in production and export supply.
Stable Export and Shipment Capability
Dabund has long-term cooperation with freight forwarders and supports regular container loading for international buyers. This helps wholesalers and distributors maintain stable inventory supply.
Compatible with Multiple HVAC Systems
Individual pre-insulated rolls can be used for ductless mini splits, VRF systems, heat pumps, and unitary HVAC system installations.
OEM and ODM Customization
Dabund supports custom kit sizes, insulation thickness, insulation material, packaging design, logo printing, and private label solutions for HVAC brands, importers, and distributors.
Dabund Factory
Dabund produces insulated copper pipe, mini split line set, aluminum pipe, and HVAC parts for global HVAC buyers.
SGS Certificate
Mini split line set insulation can be made of polypropylene or black rubber with UV resistance and compliance with ASTM E84, UL94, ASTM D1056, and ASTM G21.
Exhibition and Global Market Experience
Dabund joins international exhibitions to help customers inspect mini split line sets and HVAC installation kits face to face.
FAQ About 25 ft 3/8" x 3/4" Mini Split Installation Kit
What is a 25 ft 3/8" x 3/4" mini split installation kit used for?
It is used to connect indoor and outdoor units in mini split air conditioners, heat pumps, VRF systems, and HVACR installations. The kit includes an insulated copper line set and key installation accessories.
What HVAC system size is the 3/8" x 3/4" line set suitable for?
The 3/8" x 3/4" size is commonly used for larger split air conditioning systems around 4.5–6.0 tons or 54,000–72,000 BTU. The final size should be confirmed according to the HVAC unit manufacturer’s installation manual.
Does the kit include flared copper pipe ends?
Yes. Both copper pipe ends are flared and supplied with nuts to support easier installation and connection to HVAC equipment.
What insulation materials are available?
Dabund can provide white PE insulation and black rubber insulation. Different insulation thicknesses are available according to project and market requirements.
Can this kit be used for heat pumps and VRF systems?
Yes. The pre-insulated copper line set can be used for ductless mini splits, heat pumps, VRF systems, and other compatible HVAC installations when the equipment specifications match the line size.
What standards can the copper pipe and insulation meet?
The copper pipe can meet ASTM B280 and C12200 standards. The insulation can meet ASTM E84, UL94, ASTM D1056, and ASTM G21 requirements depending on the product configuration.
Can I customize the mini split installation kit?
Yes. Dabund supports OEM and ODM customization, including custom length, insulation thickness, insulation color, logo printing, packaging design, and accessory combination.
What are your payment terms?
Common payment terms include T/T, L/C at sight, credit card, and other agreed payment methods based on order details.
What are your delivery terms?
Dabund can support EXW, FOB, CFR, CIF, and other international delivery terms according to customer requirements.
Are you a trading company or manufacturer?
Dabund is a manufacturer of mini split installation kits, insulated copper pipes, mini split line sets, aluminum pipes, and HVAC parts.
Can I get a sample before bulk ordering?
Yes. Dabund can send free samples for evaluation. Buyers usually need to cover the express shipping cost.
How long is your delivery time?
The usual delivery time is 15–20 days. For urgent orders, Dabund can discuss faster production and delivery arrangements based on order quantity and current production schedule.
