The Uponor Q4351250 is a 1-1/4" ProPEX EP Plug designed to provide a secure seal at the end of PEX tubing in potable water or hydronic systems. Built from durable engineered polymer (EP), this plug delivers long-term corrosion resistance, high dimensional stability, and consistent performance even in demanding environments.Engineered for use with ASTM F1960 ProPEX expansion fittings, this plug is compatible exclusively with Uponor PEX-a tubing and must be installed using a ProPEX expansion tool. It is ideal for both temporary capping during system testing and permanent line terminations.Key Features:

• Manufacturer: Uponor
• Part Number: Q4351250
• Fitting Type: Plug
• Connection Method: ProPEX (expansion connection)
• Tubing Compatibility: PEX-a (PEX with shape memory)
• Material: Engineered Polymer (EP)
• Nominal Size: 1-1/4"
• Lead-Free: Yes, compliant with NSF/ANSI 61 and NSF 372
• Maximum Working Pressure: 200 psi
• Maximum Operating Temperature: 200°F (93°C)
• Standards Met: ASTM F1960, CSA B137.5, NSF 14/61, NSF 372
• Certifications: cNSFus Certified
• Installation Tool Required: ProPEX expansion tool
• Corrosion Resistant: Yes – suitable for non-metallic installations
• Reusable: No – not intended for reuse after removal

Applications:

• Potable water distribution systems
• Hydronic radiant heating and cooling
• Closed-loop heating systems
• Temporary or permanent line sealing

Whether you're sealing off a branch line or preparing a system for pressure testing, the Uponor Q4351250 ensures leak-free performance and fast installation.Available now at Beenimax.com — trusted by professionals for quality, reliability, and fast delivery.