The Viega ProPress Check Valve Model 2974.2ZL (Part No. 87170) is a lead-free, bronze valve engineered for use in potable water systems. It features ProPress connections for fast, flameless installation and reliable system performance. Designed with a stainless-steel spring and internal components, it provides consistent backflow prevention and long-term durability. Ideal for residential and commercial applications, this check valve ensures efficient, leak-resistant operation.