A plumbing phenomenon where contaminated water is drawn back into the supply system due to a reduction in water pressure. This can occur when the pressure in the potable water supply drops, creating a vacuum that allows substances from non-potable sources to enter the main line.
3 P’s
Refers to the three critical components in self-build projects: Parties (stakeholders involved), Property (description and details of the land or project), and Price (the financial aspects, including costs and payment terms). These elements are vital for successful agreements.