15mm Pipe Stiffener Inserts Pack of 100 | Fits PEX PB Copper Plastic Pipe | Push Fit Compression Fittings Support Sleeves | Plumber's Trade Pack – TradeboxDirect

• UNIVERSAL FIT FOR ALL PIPE TYPES — Compatible with 15mm PEX, PB, plastic and copper pipe. Works with all major push fit and compression fittings including Speedfit, Hep2O and Flowfit — no adapters needed.
• TRADE PACK OF 100 — GREAT VALUE — Enough stiffener inserts for a full installation job or to stock your van. Sold by TradeboxDirect, a trusted UK plumbing supplies brand. Eliminates repeat ordering on large jobs.
• PREVENTS PIPE COLLAPSE & LEAKS — Inserted into soft plastic pipe before fitting connections, these stiffeners maintain pipe shape under compression, ensuring a secure watertight seal every time.
• PROFESSIONAL GRADE MATERIAL — Made from rigid high-quality plastic for lasting performance. Resistant to corrosion, heat and pressure — suitable for hot and cold water systems and central heating circuits
• ESSENTIAL FOR RADIATOR & PLUMBING INSTALLS — Ideal for radiator valve connections, underfloor heating, bathroom and kitchen installs. A must-have addition to any plumber's toolkit or trade van stock.

Why Pipe Stiffener Inserts Matter Every plumber knows the problem — push fit and compression fittings on soft plastic pipe can fail over time if the pipe wall collapses under pressure. A loose connection means callbacks, leaks, and unhappy customers. TradeboxDirect Pipe Stiffener Inserts solve this at source. Designed for the Working Plumber These 15mm stiffener inserts are engineered to sit inside soft plastic pipe — PEX, PB, and flexible plastic — before the fitting is pushed or compressed into place. The rigid sleeve supports the pipe wall, maintaining a perfect circular bore and ensuring full contact with the fitting seal. The result: a watertight, long-lasting connection every time. The Trade Pack Advantage Running out of stiffeners mid-job costs time and money. This 100-piece trade pack means you're covered for full bathroom fits, underfloor heating runs, radiator installs and kitchen plumbing — all in one order.