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The 315 mm T Union is a metal connector designed to branch or unify ventilation lines in Indoor cultivation. Made of galvanized sheet metal, it guarantees firm and airtight joints in Ø 315 mm networks, suitable for cabinets and rooms with multiple air destinations.

With the T-Union 315 mm. it is possible to organize large-diameter extraction and intake networks without improvisation. The 315/315/315 geometry maintains section continuity and minimizes pressure loss compared to homemade joints, resulting in stable airflow and less aerodynamic noise.
The galvanized sheet body provides rigidity, resistance to humid environments, and long service life, reducing vibrations at crossings and changes of direction.
Fully compatible with 315 mm flexible ducts such as Sonoconnect, Aluconnect, and Combiconnect, as well as carbon filters, silencers, and extractors of the same range.
In configurations with several branches, the use of reducers, gates, or flow regulators allows you to balance the flow between branches and maintain negative pressure when working with a filter, which is essential to prevent odor leaks. Quick assembly using 315 mm clamps and aluminum tape for tightness and odor control.
Ideal solution for feeding two grow tents from one extraction box, splitting cold air supply from an air conditioner to two zones, or unifying returns in professional rooms.
Available at Hydroponics Blanes, Grow Shop in Spain, and Trusted Grow Shop, with technical advice, discreet shipping, and a wide catalog of cannabis growing accessories and cheap indoor grow tents.
In indoor growing projects with several rooms or multiple tents, the T-Union 315 mm. simplifies air distribution. It allows you to branch a main trunk into two zones, split the air conditioning supply, and create parallel returns that homogenize temperature and rH, avoiding heat pockets on the ceiling or in corners.
It is used to diversify ventilation routes in large diameters, distribute airflow between two areas, unify lines into a trunk, separate supply and return, divert to a drying room, or connect auxiliary equipment while maintaining flow continuity and overall system efficiency.
Among cannabis growing accessories, the T-Union 315 mm. stands out for its robustness, clean assembly, and easy maintenance. The galvanized finish withstands demanding conditions; in addition, the piece allows disassembly for dust cleaning, joint inspection, or section replacement without altering the network design.
Recommended when expanding a room with a second 315 mm tent, when a single external outlet must serve several rooms, when distributing cold air from a split to two work areas, or when the room plan requires branching returns to eliminate thermal stratification and stagnant humidity.
1) Plan the layout with trunk and branches of Ø 315 mm, defining lengths, curves, and support points.
2) Place the T at the intended intersection, aligning mouths with duct axes to minimize turbulence.
3) Insert Sonoconnect/Aluconnect/Combiconnect ducts into each mouth and secure with 315 mm clamps.
4) Seal each joint with aluminum tape for tightness and odor control.
5) In networks with several branches, install reducers or regulators to balance flows between branches and maintain negative pressure.
6) Support the network every 1–1.5 m with metal straps or ties, avoiding tension on the T-piece.
7) Check depression and total flow; adjust speeds on the controller or diameters with reducers until optimal balance is achieved.
At Hydroponics Blanes you can purchase the T-Union 315 mm. with expert support and fast delivery. Complete catalog of cheap indoor grow tents, ventilation, climate control, and cannabis growing accessories all in one Grow Shop in Spain.
Quick sheet: Galvanized T-Union 315/315/315; material galvanized sheet; diameter 315 mm. Technical recommendation: in networks with several branches, use step reducers or gates to distribute flow and maintain negative pressure throughout the installation.
To split or unify ventilation lines efficiently, the T-Union 315 mm. provides firm, tight, and durable joints. Professional solution for expanding tents and rooms, available at Hydroponics Blanes with specialized advice, a complete selection of components, and discreet shipping nationwide.
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