Tianyan Aquarium PVC Bulkhead Fitting | Fish Tank Inlet, Outlet, Drain & Union Overflow Water Connector (20mm-50mm) - Atradesen

Tianyan Premium Aquarium Bulkhead Fittings & Over Connectors (20mm - 50mm)

Configure your fish tank plumbing with our premium Tianyan aquarium bulkhead fittings, available at Atradesen.com. Manufactured from drinking-water-grade (potable) PVC, these connectors are completely non-toxic and lead-free, ensuring they are safe for sensitive freshwater fish, reef aquariums, and marine life.

Whether you are setting up a bottom-drain overflow system, a multi-stage sump filter, or bottom blowout water currents, this versatile series provides high-seal and low-resistance flow paths. Choose between sleek Dark Gray and clean White to match your aquarium's aesthetic.

Fitting Models & Applications

• Inlet/Outlet Bulkheads (Straight & Elbow): Standard bulkheads for smooth water delivery and return lines through the bottom or back glass.
• High-Flow Fast Drains (Straight & Elbow): Feature protective grid strainer caps to allow high-volume bottom drainage while preventing fish or snails from entering the plumbing.
• Union Bulkheads (Single & Double Union): Incorporate union coupling nuts allowing easy tool-free detachment of the plumbing for routine maintenance and cleaning.
• Short Single Union: Compact single-union profile ideal for tight cabinet spaces under the sump.
• Bottom Inlet Straight: Specifically optimized for creating upward, bottom-up flow dynamics in specialized aquariums.

⚠️ Size Selection & Installation Guide

Please read these critical alignment steps before ordering to ensure a leakage-free fit:

• Socket Diameter Matches Pipe OD: The product size options (e.g., 20mm, 25mm) refer to the INNER diameter (ID) of the connector socket. Choose the option that matches the OUTER diameter (OD) of your PVC pipe.
• Glass Hole Drilling & Clamping Thickness: Standard PVC pipes cannot pass directly through the glass. You must drill the correct hole size according to the thread specification of each connector model. Please refer carefully to our specification chart images for exact glass drilling diameters and maximum glass clamping thicknesses.
• Dual Connection Methods: Features socket ends designed for standard PVC solvent glue welding, alongside compression unions for rapid maintenance access.

Product Specifications