The Charlotte Pipe 1 in. MPT x 1-1/4 in. Slip PVC Adapter is a precise, code-approved connector designed to bridge a threaded PVC line to a slip-fit PVC run in pressure systems. Built for reliability in above-ground installations, this lead-free adapter delivers a secure transition without sacrificing flow or integrity.
Key features that matter in real-world piping projects:
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End 1: 1" MPT (Male Pipe Thread) — for threaded connections that seal cleanly when paired with compatible PVC or CPVC fittings.
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End 2: 1-1/4" Slip — a socket designed for a smooth, cemented solvent-weld joint to a 1-1/4" PVC pipe.
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Material: PVC — a durable, corrosion-resistant choice for many pressure applications.
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Lead Content: Lead-Free — suitable for potable water and other standard piping uses.
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Certifications: NSF Listed and IAPMO Certified — meeting safety and sanitary standards for water systems.
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Brand: Charlotte Pipe — a trusted name known for consistent quality in PVC fittings.
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Packaging: Bulk; Number in Package: 1 — designed for single-use replacement or limited runs in repair work.
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Application: Specifically designed for pressure applications where a threaded-to-slip transition is needed.
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Industry notes: Not rated for underground use; ANSI certification not indicated.
How and when to use this adapter
Use this 1" MPT to 1-1/4" Slip PVC adapter to connect a threaded PVC line to a larger slip-fit PVC segment in above-ground pressure systems. It’s an ideal choice when you need to transition from a threaded pipe to a cemented PVC run without changing the rest of your layout.
Practical use cases:
- Repairing or updating an above-ground potable-water line that requires a threaded-to-slip transition.
- Extending a pressure-rated PVC run by connecting a threaded supply line to a solvent-welded branch.
- Repairs on irrigation or seasonal water systems where a reliable MPT-to-slip connection is needed.
Installation tips for solid, leak-free joints
- End 1 (MPT): Apply a compatible thread sealant or PTFE tape to the 1" male threads and tighten to seal—avoid over-torquing to prevent thread damage.
- End 2 (Slip): Clean the bore and the pipe end, apply PVC cement to the 1-1/4" slip socket, and insert the PVC pipe fully for a solid solvent-weld connection.
- Inspect for alignment before cement cures to ensure a straight, leak-free run.
- Store and handle away from direct sunlight to maintain PVC integrity over time.
Choosing this Charlotte Pipe adapter means prioritizing reliability, safety, and ease of installation in everyday piping projects. Its combination of lead-free PVC, NSF and IAPMO certification, and a clearly defined 1" MPT to 1-1/4" slip configuration helps you work confidently, whether you’re a pro plumber or a handy DIYer tackling a pressure-line upgrade.
