The TSM Pipe Inserts 28mm is a critical plumbing accessory engineered to maintain the structural integrity and round shape of plastic pipe ends when making connections. Designed for professional plumbers and heating engineers, it ensures a secure, leak-free seal when linking plastic polybutylene or PEX pipe to push-fit or traditional compression fittings.
 
Manufactured from durable, high-strength engineering plastics, this insert reinforces the pipe internally, preventing it from deforming, ovalising, or collapsing under side loads, cutting stress, or compression. Its precise profile allows for smooth insertion while ensuring the O-ring seal within the fitting grips correctly.
 
Essential for domestic and commercial hot and cold water services as well as central heating systems, the 28mm insert is a mandatory trade consumable for maintaining long-term system reliability and upholding manufacturer warranties on plastic pipe installations.