SJ-77-B INABA DENKO Duct Coupler for SLIMDUCT SD-77 (brown)
€2.03 Incl. VAT
INABA DENKO SJ-77-B lineset cover connector provides a secure joint between SD-77 straight ducts for extending air conditioner and heat pump pipe covers. Finished in brown, this UV- and water-resistant PVC duct coupler helps maintain a clean, continuous SLIMDUCT SD trunking installation indoors or outdoors.
- Fast delivery across Europe (5-10 business days)
- 30-day returns
- No customs duties within the EU
- Secure payments
INABA DENKO SJ-77-B Duct Coupler for SLIMDUCT SD-77
The INABA DENKO SJ-77-B duct coupler joins SLIMDUCT SD-77 straight lineset cover sections to create a clean, continuous decorative trunking system. It enables longer protective routes for refrigerant pipes, cables and drain lines in air conditioning and heat pump installations while maintaining a neat, consistent appearance.
The connector forms a neat transition between two SD-77 sections and helps keep the covered installation visually consistent. Its brown finish is suited to matching SLIMDUCT components where the trunking needs to blend with darker façades, timber-toned surfaces or interior finishes.
A screw-fixed cover keeps the connector securely assembled. Manufactured from durable PVC with UV and water resistance, the SJ-77-B can be used for both indoor and outdoor installations and operates at temperatures from −20 °C to +60 °C.
KEY FEATURES
- Lineset cover connector for SLIMDUCT SD-77 straight ducts
- Extends SLIMDUCT SD-77 across longer pipe runs
- Provides a neat joint between adjoining trunking sections
- Supports a continuous decorative refrigerant pipe cover
- Helps keep refrigerant pipes, drain lines and cables concealed and protected
- Part of the Brown SLIMDUCT trunking system
- Screw-fixed cover
- Includes 2 stainless steel screws
- UV- and water-resistant PVC
- Suitable for indoor and outdoor use
- Operating temperature: −20 °C to +60 °C
- Colour: Brown (RAL 6014)
- Made in Thailand
DIMENSIONS

APPLICATIONS
Use the SJ-77-B duct connector wherever two SD-77 lineset cover sections need to meet along an extended HVAC pipe route. It is suitable for residential and commercial air conditioning and heat pump installations, providing a finished connection without leaving a visible break between straight duct sections.
Together with compatible SLIMDUCT SD fittings, the coupler contributes to a modular decorative trunking system that organises, covers and protects refrigerant lines, condensate drainage and electrical wiring.
DOCUMENTS
SLIMDUCT SD Trunking System Catalogue
| Weight | 0.075 kg |
|---|---|
| Dimensions | 230 × 70 × 130 mm |
Related products
SC-77-A INABA DENKO trunking vertical elbow 90° (Anthracite gray)
SC-77-I INABA DENKO trunking vertical elbow 90° (Ivory)
SC-77-K INABA DENKO trunking vertical elbow 90° (Black)
SD-77-W INABA DENKO SLIMDUCT SD Lineset Cover 1 m (white)
INABA DENKO SLIMDUCT SD-77-W lineset cover for air conditioners and heat pumps conceals and protects refrigerant pipes, condensate drain lines and electrical cables. The 1 m white decorative lineset cover offers a practical solution for shorter HVAC pipe routes and integrates with the SLIMDUCT SD trunking system for indoor and outdoor installations.
SK-77-W INABA DENKO trunking flat elbow 90° (White)
Inaba Denko 90° trunking flat elbow SK-77-W (White) is a high-quality PVC pipe fitting designed for modern and professional HVAC line set installations. Ideal for sharp 90-degree horizontal turns, it ensures seamless routing of refrigerant pipes in heat pump and air conditioning systems while offering UV-resistant, weatherproof protection. With its sleek and stylish design, it seamlessly integrates into modern homes while providing long-lasting protection for your piping.








