Depending on the type of heating and hot water system you have this could be a few things. All are easy to diagnose and range from a few pounds to a few hundred pounds. Follow the easy steps and we’ll find the problem.

1. Look where the overflowing pipe comes out of your house. Is it from the eaves of the roof, near a bathroom / toilet or near a boiler/hot water cylinder.
2.Look at the type of pipe the water is coming from what is the material is it metal of plastic.
Plastic pipe from near bathroom/toilet – Water level in toilet cistern is too high.
Plastic pipe near a boiler – Could be the condensate pipe from a modern condensing boiler leaking.