i have recently had a new mains water pipe fitted this comes in under ground into the hallway then surfaces again into the hallway this pipe is the blue plastic type this pipe then joins the copper pipe that feeds the rest of the house the problem is ihave excess condensation forming on the pipe which is causing alot of water on the concrete floor and walls i am concerned about damp problems occuring has anyone any solutions for me p.s. the floor the pipe comes up into the hallway is concrete thanks in advance irph1.
This condensation is due to a temperature difference of the cool water and the surrounding air. This can easily be prevented by insulating the pipe. The same type of foam insulation that central A/C lines use would work great for this. Most home stores sell something similar and suitable is usually marketed for saving heat loss on hot water pipes. Just the same you want to insulate and tape off air gaps and this should prevent the moisture from forming. Also make sure you don’t have any leaky sinks or a toilet running on. This causes more flow in the water system bringing the temp further down in the pipe. A sweaty main is a also a indicator of constant water flow.