Pentair 78210400 is a large stainless steel niche designed for compatible underwater pool and spa light installations in concrete applications. This niche provides the recessed housing structure needed to mount the light securely within the pool wall while supporting proper fitment and long-term service access. It is suitable for new construction, replacement, and lighting retrofit projects requiring a compatible concrete niche assembly.

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Key Features

• Pentair 78210400 is a large stainless steel niche designed for compatible underwater light installations in concrete pool and spa applications.
• The stainless steel construction helps provide durability and corrosion resistance in demanding submerged pool environments.
• This niche includes a 3/4 inch top hub for compatible conduit connection as part of the lighting installation.
• The large niche design provides the recessed housing structure needed to support secure mounting of the light fixture.
• It is intended for concrete pool construction where correct niche selection is important for proper fitment and serviceability.
• Proper niche installation helps maintain stable fixture positioning and supports future access for maintenance or replacement.
• This part is suitable for new pool builds, renovation work, and replacement lighting projects using compatible Pentair systems.
• It is a practical installation component for builders, service technicians, and pool professionals working on underwater lighting systems.

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Product Overview

The Pentair 78210400 Large Stainless Steel Niche for Concrete Pools is an installation housing component built for compatible underwater lighting systems. Its purpose is to provide the recessed structural opening needed to mount a light fixture securely within a concrete pool or spa wall. In underwater lighting applications, the niche is a critical part of the installation because it establishes correct fixture placement, supports conduit connection, and helps preserve long-term serviceability of the lighting system.

Built with stainless steel construction and a 3/4 inch top hub, this niche is well suited for projects where durability, dependable installation, and compatibility with concrete construction are important. It is commonly used in new construction as well as retrofit and replacement work where the correct light housing must be maintained. For builders, remodelers, and service professionals, this niche helps support a clean, professional, and serviceable underwater lighting installation.