Description
AquaStar Wall Fitting 4-Inch Grey – USA-Made, Dual-Connection Pool Wall Fitting
AquaStar Wall Fitting is a robust 4-inch diameter wall penetration designed for reliable, long-lasting pool installations. Crafted in the USA for professionals and DIY enthusiasts alike, this grey wall fitting offers versatile dual-connection options to simplify your build, retrofit, or upgrade projects.
- 4" diameter body: A sturdy wall penetration built to withstand regular pool use and maintenance.
- Dual-connection configuration: 2" male pipe thread (MPT) end and 1-1/2" slip end for flexible piping integration.
- 2-3/8" hub size (HS): Ensures a secure, precise fit within standard wall assemblies.
- Grey finish: Subtle, pool-friendly color that blends with surroundings while maintaining accessibility for service.
- American-made: Manufactured in the USA to ensure consistent quality and durable performance over time.
- Model/Part Number: 420T15S103 (MPN 42OT15S101)
The AquaStar wall fitting is ideal for new builds, renovations, and upgrades where a dependable, easy-to-install wall connection is essential. Whether you’re tying into a threaded line or transitioning to a slip connection, this fitting reduces the need for extra adapters and helps deliver a clean, professional finish to your pool shell. Built to endure and designed for straightforward installation, it supports reliable operation and a lasting, trouble-free service life.
AquaStar Wall Fitting [4" Diameter] [2-3/8" HS, 2" MPT-1-1/2" Slip] [Grey] (420T15S103) is engineered to deliver reliable, long‑lasting performance in pool installations. Designed and manufactured solely in the USA, AquaStar Pool Products exemplify a commitment to quality, durability, and a look that complements any pool interior. This wall fitting embodies AquaStar’s promise of dependable, American‑made performance, designed to provide the very best look, feel and functionality.
Key features
- 4" diameter body for a robust, durable wall penetration that stands up to regular pool use.
- Dual-connection configuration with a 2" male pipe thread (MPT) end and a 1-1/2" slip end, offering flexible integration with common piping setups.
- 2-3/8" hub size (HS) to ensure a secure fit within standard wall assemblies.
- Grey finish designed to blend with pool surroundings while maintaining visibility for service access.
- American-made quality – part of AquaStar’s USA‑built, long‑lasting pool products lineup.
Ideal for
Professionals and DIY enthusiasts working on new pool builds, renovations, or upgrades where a dependable wall fitting is required. Whether you’re tying into a threaded line or transitioning to a slip connection, this AquaStar wall fitting provides a reliable, project‑friendly solution that reduces the need for multiple parts and adapters.
Why choose AquaStar
Choosing AquaStar means opting for durability, consistent performance, and a finish that ages well in pool environments. With a strong American manufacturing backbone, this wall fitting reflects AquaStar’s dedication to quality control and dependable operation across the life of your pool system.
Installation and best practices
- Verify piping compatibility: one end accepts 2" MPT threads, while the opposite end uses a 1-1/2" slip connection.
- For MPT connections, apply appropriate thread sealant or Teflon tape to ensure a watertight seal.
- For slip connections, use standard PVC cement and ensure proper alignment before curing.
- Position the hub size (2-3/8") to align with your existing wall aperture for a snug, leak-resistant fit.
With the AquaStar Wall Fitting, you get a purpose‑built, American‑made solution designed to simplify installations while delivering dependable performance and a professional, finished look for your pool project.


