Premium Pure Black UPVC Reducing Coupling - Light-Blocking Slip Pipe Reducer (25mm to 50mm ID)

2026-04-29T02:22:27-07:00

Price: 1.02 - 30.78 (20 variants)

Premium Pure Black UPVC Reducing Couplings

Stepping down pipe sizes in high-end aquariums, hydroponic systems, or purified water networks shouldn't invite algae growth or create hydraulic bottlenecks. Our Heavy-Duty Pure Black UPVC Reducing Couplings solve both issues flawlessly. Featuring a sleek, high-gloss black finish, these straight reducers provide 100% light-blocking protection to prevent internal bio-fouling. Engineered with a smooth internal taper to minimize fluid turbulence and rated for an impressive 1.6 MPa (PN16), they deliver a secure, leak-proof transition that looks incredibly professional.

🌟 Key Engineering Features:

Algae-Proof Aesthetic: The solid black construction completely blocks light penetration, keeping your fluid system crystal clean while offering a uniform, premium look for exposed plumbing layouts.

Smooth Flow Transition: The meticulously engineered internal taper prevents turbulent flow and minimizes hydraulic shock when reducing your pipeline size, safeguarding your pumps and equipment.

Industrial Chemical Resistance: Molded from non-toxic, unplasticized PVC. Highly resistant to corrosive wastewater, strong acids, alkalis, and marine saltwater.

Permanent Slip Sockets: Features perfectly machined slip sockets (measured by Inner Diameter) on both ends for a seamless, permanent solvent weld (glue) connection.

📐 Installation Guide:

Sizing is listed as Large Slip ID x Small Slip ID. Apply standard PVC solvent cement to the exterior of both pipes and the interior of both slip sockets before pressing them firmly together. Upgrade your system's aesthetics and efficiency today!