Why does my drainage pipes rattle all the time?

This is a common issue you need not worry. This occurs since the water lines are not being properly secured. It means that there are one or more places your water lines come in contact with the wood of your floor joists. You will need to get plastic pipe hangers that go between your water lines and your joists. I had this problem once and I called the High Efficiency Heating and Cooling Inc.They came and settled once and for all. It will be better if you call your plumber too since it may be difficult to handle yourself.

Normally drainage pipes do not rattle unless you have a pumped discharge such as a sewerage ejector or sump pump

Also many installers are inept when it comes to the proper placement of vertical and spacing of horizontal supports

I found many of the so called "plumbers" who install plastic drainage do not use Clevis hangers and opt for the cheaper band iron which causes piping to sway.

If your hearing a rattling (banging) sound this type of water hammering / hydraulic shock is normally caused by quick closing valves such as a dishwasher or washing machine solenoids valves opening and closing

By installing a shock absorber or making your own air chamber next to these devises it will give the shock wave a place to dissipate.

Depending on the severity of the shock wave it can cause piping to rupture because of the sudden stoppage of flow