Interchangeable Pool & Spa Return Nozzles

Take control of your pool or hot tub water flow with this customizable set of 3D printable return nozzles. Designed to fit standard in-ground pool and spa return fittings (1.5" pipe compatible), these spherical inserts (≈41mm diameter × 20mm height) snap or press-fit securely into place.Featuring a variety of nozzle geometries—including slotted, circular, and multi-jet diffuser styles—this modular system allows you to fine-tune flow patterns, velocity, and direction to optimize circulation, heating, or jet massage performance.✅ Features:Multiple interchangeable nozzle styles with unique orifice shapes and sizesFits most standard 1.5" pool/spa returnsDesigned for easy swapping and experimentationIdeal for both pools and hot tubsDepth-sensitive design – increase size by 1–2% for deeper gunite finishes🛠 Material Recommendations:Production: ASA, ABS, or other filaments resistant to chlorine, UV exposure, and heatPrototyping: PLA or PETG (short-term use only)💡 These inserts are pe