The Courbi Coupling D40 Heavy Duty is a specialist fitting for joining straight and flexible conduit runs at a nominal diameter of 40 mm (Φ40 mm). It accepts both spiral and rigid variants of the COMBO, DOMO, and FORTE conduit systems and carries an IP54 water-tightness rating.

Manufactured in grey (RAL 7035) thermoplastic and certified to EN 61386-1/2004 and EN 61386-22/2004, it is suited to professional electrical installation work where a secure, moisture-resistant conduit joint is required.

Key Features

• Connects straight and flexible conduits at Φ40 mm nominal diameter
• Heavy duty construction for demanding installation conditions
• IP54 water-tightness rating — protected against dust and water splashing
• Compatible with Spiral COMBO, DOMO, FORTE and Rigid COMBO, DOMO, FORTE conduit systems
• Grey colour, RAL 7035

Product Benefits

• IP54 rating keeps moisture out of the conduit joint, protecting internal wiring
• Heavy duty grade withstands higher mechanical stress than standard-duty equivalents
• Broad system compatibility means a single fitting covers multiple conduit types on site
• EN 61386-1/2004 and EN 61386-22/2004 compliance supports installation sign-off and inspection
• Pack of 3 provides the right quantity for smaller installations or targeted repairs

Technical Specifications

• Type: Coupling (straight connector)
• Conduit Diameter: D40 mm (Φ40 mm)
• Duty Rating: Heavy Duty
• Water Tightness: IP54
• Compatible Systems: Spiral COMBO, DOMO, FORTE; Rigid COMBO, DOMO, FORTE
• Colour: Grey, RAL 7035
• Standards: EN 61386-1/2004, EN 61386-22/2004
• Pack Quantity: 3 pieces

Why You'll Love It

• Ready to use straight from the pack — no cutting or preparation required
• RAL 7035 grey blends with standard conduit on surface-mounted installations
• Pack of 3 is well-suited for single-circuit runs or topping up existing stock
• Package includes 1× Courbi Coupling D40 Heavy Duty, pack of 3 pieces