Charlotte Pipe Schedule 40 4 in. MPT x 4 in. Slip PVC Adapter is the reliable 4-inch transition you need for clean, secure PVC piping connections in pressure systems. This adapter combines a 4 in. male pipe thread (MPT) end with a 4 in. slip end, giving you a versatile, code-approved solution for above-ground installations.
Why this adapter stands out
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Lead-free & certified: Lead-Free construction supports safe potable-water use. IAPMO certified and NSF listed confirm compliance with plumbing codes and drinking-water safety standards.
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Durable PVC schedule 40: Built from PVC Schedule 40, offering rigid, corrosion-resistant joints suitable for a range of water, irrigation, and pressure applications.
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Precise ends for strong joints: End 1: 4 in. MPT; End 2: 4 in. Slip — ideal for transitioning a threaded 4" PVC pipe to a solvent-welded 4" pipe run.
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Pressure and temperature specs you can trust: Maximum pressure 220 psi and maximum temperature 140°F make it suitable for common residential and light commercial systems.
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Install-ready packaging: Bulk packaging; 1 piece per package ensures you have exactly what you need for single connections without waste.
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Not for burial: Underground rated: No — designed for above-ground or interior installations.
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Recommended usage: Pressure piping applications where a reliable MPT-to-slip transition is required, such as water supply lines, irrigation manifolds, or pool equipment connections.
Real-world scenarios
In a home renovation, you may need to connect a threaded PVC pipe to a new 4" PVC run. This adapter provides a clean, code-compliant link that you can solvent-weld on the slip side and thread onto the male pipe on the other. For irrigation projects, use this adapter to join threaded main lines to slip-end risers or manifolds. And in a spa or pool setup, it offers a sturdy connection point between rigid threaded components and PVC pipe runs, all while meeting NSF and IAPMO requirements.
Pro tips for a reliable install
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Prepare surfaces: Clean and dry slip end and threaded end before assembly.
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Seal the threaded side: Apply an appropriate pipe thread sealant or PTFE tape to the MPT end for a leak-free seal.
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Use the right cement: Apply PVC cement to the slip end as per product instructions, then assemble and hold until set.
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Check alignment: Dry-fit first to ensure proper orientation and fit before cementing or tightening.
