SECRET JARDIN RUBBER DUCT COUPLING 150MM

Description

Secret Jardin Rubber Duct Coupling 150mm is a flexible rubber connector for joining 150mm inline fans, carbon filters, and ducting components in grow tents and grow rooms, providing simultaneous vibration isolation and an airtight duct seal that dramatically reduces the structure-borne fan noise transmitted through ventilation systems. We have been recommending Secret Jardin grow room accessories to UK growers since 2017 as well-designed, practical solutions that make building and running a professional ventilation system significantly easier and quieter, and the 150mm rubber coupling is one of the accessories that makes the biggest practical difference to grow room noise levels.

How the Rubber Coupling Reduces Noise Through Vibration Isolation

When an inline fan is connected to a carbon filter or ducting using rigid metal clamps alone, the motor’s rotational vibration is transmitted directly through the metal-to-metal connection into the filter housing and ductwork. This mechanical vibration travels along the full duct run and radiates as audible noise from every surface it reaches — the tent frame, the ceiling, and the ductwork itself all become secondary radiators of fan noise. The rubber material of the Secret Jardin coupling is a viscoelastic damper — it deforms slightly under vibration rather than transmitting it, absorbing the mechanical energy before it can propagate into the connected components. The practical result is a measurably quieter fan system with no change to fan speed or airflow. The flexible rubber also accommodates the small angular and positional misalignments inevitable in hand-assembled tent installations, reducing stress on fan and filter flanges. The airtight rubber compound ensures no odour leakage at the connection joint.

How to Install the Secret Jardin Rubber Duct Coupling 150mm

Slide the coupling over both mating flanges — fan outlet and carbon filter inlet — centring it over the joint. Secure both ends with the included clamps, tightening evenly around the circumference. The coupling should be in slight compression, not stretched taut, for effective vibration isolation. Run the system and feel the filter body — significantly less vibration should be present compared to a rigid connection. Replace if the rubber becomes cracked, hardened, or visibly deteriorated.

Pair the 150mm Rubber Duct Coupling with a 150mm Revolution or RAM inline fan, Can-Lite carbon filter, and Phonic Trap acoustic ducting for a complete, low-noise 6-inch extraction system. Browse our full Secret Jardin and ventilation accessories range.