Content Provided by WestLakeMaterials matter during a well installation—Westlake Pipe & Fittings innovates to deliver easily-assembled, durable PVC products. Westlake Pipe & Fittings' ongoing commitment to innovation led to a design solution that moves past mere product improvement. Using years of application insights, Westlake Pipe & Fittings engineers took a broader look at the well-received spline lock approach invented decades before.