Whirlwind Utilities Ltd has developed a process to remove tubercles and other deposits from the internal pipe walls of potable water mains prior to relining.Tubercles form as the result of corrosion inside cast water mains and consist of layers of corrosion product (rust), building up over time to form lumps and mounds over local areas of metal loss.Tubercles can severely reduce the internal bore of pipes, leading to reduced flow and discoloration, affecting both the quality and supply of water to the customer.Whirlwinds latest development is an innovative process to apply a fast cure PU resin to the inside surface of small bore pipes such as lead service pipes to eliminate lead contamination from drinking water.