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Here, we’re looking at a “dead legs” and “blind ends”, potentially dangerous plumbing errors that are frequently found in many building water systems, that if left unchecked, can lead to serious bacterial contamination problems.
In general terms, a dead leg and a dead end are the same: they are sections of pipework that are redundant or very infrequently used. As a result, water will stagnate within the pipe, leading to a build-up of organic matter like sludge and slime that in combination can encourage and release harmful contaminants into the water.
How to remove dead legs from hot & cold water pipes to prevent legionella. Recognise dead-legs, why they are dangerous & maximum pipe sizes.
Nov 12, 2023 · DEAD END. A branch leading from a soil, waste or vent pipe; a building drain; or a building sewer, and terminating at a developed length of 2 feet (610 mm) or more by means of a plug, cap or other closed fitting. The prohibition and the definition of "Dead End" have been removed from the IPC.
Nov 6, 2010 · My plan is to attempt to remove the existing PEX plumbing going to the water heater as close as possible to the nearest branch, but if that turns out to be difficult I'd like to cap off the old PEX just inside the wall.
Mar 30, 2021 · I've been reading online about the risk of bacteria such as legionella developing in the system and the recommendation seems to be that the dead leg's maximum length should be at most 1.5 times the diameter of the pipe itself. The dead legs shown in the picture are about 4 times the diameter.
Jul 5, 2024 · Dead legs are sections of plumbing where water stagnates, leading to bacterial growth and system inefficiencies. Understanding their formation, risks, and solutions is crucial for maintaining safe and efficient water systems.
