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The IPEX 36630 is a PVC Schedule 80 spigot x socket bushing designed to reduce a 4-inch spigot connection down to a 3-inch socket connection in industrial and commercial piping systems. Manufactured to Schedule 80 dimensional and pressure standards, this bushing delivers greater wall thickness and higher pressure ratings than Schedule 40 equivalents. The PVC construction provides strong resistance to rust, pitting, scaling, and corrosion, making it a reliable long-term alternative to metal fittings. It is engineered for use in chemical process piping, water treatment, and other demanding fluid-handling applications where dimensional consistency and material integrity are critical. Installation is typically performed by licensed plumbers or industrial pipefitters.
This bushing is suited for industrial process piping, chemical distribution systems, and potable water applications where a reduction from 4-inch to 3-inch pipe is required. Its smooth interior bore resists buildup across a wide range of service fluids, including acids, alcohols, alkalis, salt solutions, and halogens. The fitting is listed with the National Sanitation Foundation (NSF) and CSA International for use with potable water, broadening its application range to include municipal and commercial water systems alongside industrial installations.
Designed as an OEM-style replacement or new-installation fitting compatible with 4-inch spigot and 3-inch socket Schedule 80 PVC piping systems.
Installation should be performed by a licensed plumber or qualified industrial pipefitter following applicable plumbing codes such as IPC or local jurisdiction requirements. Shut off and fully depressurize the piping system before cutting into existing lines or making new connections. Use only PVC-rated solvent cement and primer appropriate for Schedule 80 pipe when joining solvent-weld connections. Do not apply heat to seat or adjust PVC fittings, as this degrades material integrity.
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