PVC unions are designed to connect two pieces of PVC pipe together in a way that allows for easy disassembly for maintenance or repair without the need for cutting. These fittings consist of three parts: a nut, a female end, and a male end. When assembling, the nut slides over one of the pipe ends, followed by the female part. The other pipe end is connected to the male part. The two ends are then brought together, and the nut is tightened over the female part, securing the connection. This creates a seal that can withstand the pressure but can also be easily undone by loosening the nut, enabling pipe maintenance or system modification without significant disruption. PVC unions are widely appreciated for their simplicity, reliability, and convenience in plumbing systems.

Polypropylene is a type of plastic, designated as #5 PP, that is widely regarded as safe and is commonly used in food containers, baby bottles, and many other products. Importantly, it is BPA-free. BPA, or Bisphenol A, is a chemical compound found in polycarbonate plastics and epoxy resins, known for its potential health risks including hormonal disruptions. Given the concerns surrounding BPA, consumers often seek safer alternatives for food storage and packaging. Polypropylene serves as one of these alternatives, offering a BPA-free choice that does not leach harmful chemicals into food or drinks, making it a preferred material for those looking to minimize their exposure to toxic substances in everyday products.

The molecular weight is 79.866 g