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

2026-04-29T02:22:23-07:00

Price: 1.02 - 36.17 (20 variants)

Premium Pure Black UPVC Reducing Couplings (Bell Reducer)

Stepping down pipe sizes in high-end aquariums, hydroponic systems, or exposed architectural plumbing requires a fitting that guarantees both fluid efficiency and aesthetic perfection. Our Heavy-Duty Pure Black UPVC Reducing Couplings feature a distinct bell-shaped design that ensures a smooth, gradual reduction in pipe diameter, eliminating the harsh turbulence caused by standard step-down fittings. Finished in a sleek, high-gloss black, they provide 100% light-blocking protection to prevent internal algae growth while delivering a professional, uniform look.

🌟 Key Engineering Features:

Smooth Bell Transition: The engineered bell shape provides an optimal flow dynamic, drastically reducing water hammer and pressure loss when transitioning between different pipe sizes.

Algae-Proof Aesthetic: The solid black construction completely blocks light penetration, keeping your fluid system crystal clean and free from internal bio-fouling.

Industrial Chemical Resistance: Molded from non-toxic, unplasticized PVC and rated for an impressive 1.6 MPa (PN16). 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 design and flow efficiency today!