1. The 1/4" 3/8"C Connecting Pipe Refrigeration Line Set has an outer dimension of 6.35mm - 9.52mm, offering precise and reliable measurements for your HVAC needs.
2. Crafted from 99.9% pure copper, this pipe complies with ASTM B280 and C12200 standards, ensuring top-notch quality and durability.
3. Our AC Copper Sizes include: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", and 1 1/8". Available lengths are 15m, 20m, 25m, 30m, and 50m, catering to diverse requirements.
4. The insulation is constructed from 1/2" Polypropylene, UV resistant, and meets ASTM E 84, UL94, ASTM D1056, and ASTM G 21 standards. It operates efficiently within a temperature range of -40ºC to 120ºC.
5. Suitable for all Air Conditioning & Refrigeration applications, including Ductless mini-split systems, heat pumps, and Centralized Air Ducted Units.
6.
Pressure Rating: Withstands 2100 to 7000 PSI, far exceeding the required 700 PSI for R410, ensuring robust performance.
7. We produce our insulation in-house, allowing customization with your company name, size, and meters.
Size List
Size |
Copper Pipe |
Thickness Insulation Size |
Length Available |
Flame Resistant |
1/4+3/8 |
6.35x0.75+9.52x0.8mm |
3/8"/1/2"/3/4"/1" |
1ft - 164ft |
M1/B1 |
1/4+1/2 |
6.35x0.75+12.7x0.8mm |
3/8"/1/2"/3/4"/1" |
1ft - 164ft |
M1/B1 |
1/4+5/8 |
6.35x0.75+15.88x0.9mm |
3/8"/1/2"/3/4"/1" |
1ft - 164ft |
M1/B1 |
3/8+5/8 |
9.52x0.8+15.88x0.9mm |
3/8"/1/2"/3/4"/1" |
1ft - 164ft |
M1/B1 |
3/8+3/4 |
9.52x0.8+19.05x0.9mm |
3/8"/1/2"/3/4"/1" |
1ft - 164ft |
M1/B1 |
1/2+3/4 |
12.7x0.8+19.05x0.9mm |
3/8"/1/2"/3/4"/1" |
1ft - 164ft |
M1/B1 |
3/8+7/8 |
9.52x0.8+22.22x1.14mm |
3/8"/1/2"/3/4"/1" |
1ft - 164ft |
M1/B1 |
Our Copper Line Sets, available up to 50ft, come with both ends flared and fitted with nuts for easy installation.






Changzhou DABUND Pipe Co., Ltd. stands as a professional manufacturer of HVAC parts, specializing in air conditioner installation pipe kits. Our offerings include insulated copper pipes and comprehensive installation kits. We also produce white embossed PE insulation and aluminum pipes in-house, providing cost savings for our customers. With a forward-thinking approach, we rapidly introduce our air conditioner connecting pipes to numerous overseas markets. We aim to be your ONE-STOP shop for HVAC & R parts, including Air Conditioner Brackets, Ducts, Rubber insulation, Drain Hoses, Pumps, and Bases for external units. Our products are exported to countries like the USA, Canada, Germany, and beyond. Our management concept, "Growing with clients," drives our continuous improvement and service excellence.
Quality is our top priority, as we believe it reflects the true vitality of our enterprise in the market. We eagerly welcome customers and friends from around the globe to collaborate with us. We look forward to your inquiries and to providing exceptional service. Enjoy DABUND, Enjoy Life.
1. Q: What are your payment terms for the 50FT 3/8" 3/4" HVAC Line Set?
A: We accept TT, L/C at sight, credit cards, and more.
2.
Q: Can I get a sample?
A: Absolutely! We can send you a free sample. You only need to cover the express shipping cost.
3.
Q: What is the lead time for samples and production?
A: * Existing samples: 2 days;
* Customized samples: 5-7 days;
* Production time: 15-20 days.
4.
Q: Can I print my logo on the products?
A: Yes, definitely! We welcome both OEM and ODM requests.
5.
Q: What is your typical delivery time?
A: Usually, it's 15-20 days. For urgent orders, please inform us in advance.
6.
Q: What products do you offer?
A: We provide air conditioner installation pipes, copper line sets, line set covers, and other HVAC parts.
7.
Q: Are you a trading company or manufacturer?
A: We are a manufacturer.