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The VIEGA 35801 is a 1-1/4-inch diameter PEX tubing sold in straight 20-foot lengths for commercial plumbing installations. Manufactured from cross-linked polyethylene (PEX) and finished in white, this tubing meets ASTM F-876 and ASTM F-877 standards, confirming it is rated for both pressure and temperature performance in potable water systems. The designation code 5306 identifies the specific performance class of the tubing. With barbed end connections on both ends and 6-month UV resistance, the 35801 is suited for structured rough-in work where the tubing will be transitioned quickly to fittings and protected from prolonged sunlight exposure.
This tubing is intended for commercial plumbing applications where larger-diameter PEX is specified for main distribution runs, branch manifold feeds, or high-flow domestic water lines. Straight-length format makes it straightforward to handle on the job site compared to coiled tubing, reducing spring-back and simplifying measurement and cutting during rough-in. Licensed plumbers and commercial mechanical contractors working on new construction or renovation projects are the primary installers of this product.
Designed as an OEM-style straight-length PEX tubing for use with barbed PEX fittings in commercial plumbing systems where 1-1/4-inch pipe size is specified.
Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and depressurize the line before cutting or connecting tubing. Use a proper PEX pipe cutter to ensure a clean, square cut at connection points; ragged cuts can compromise barbed fitting seals. Limit exposure to direct sunlight beyond the rated 6-month UV resistance window — transition to final installation or protective conduit before that period expires.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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