Rattling or Thumping Pipes – Cures
These cures relate to general rattling or banging when you turn the tap on.
The various reasons for these noises, and their cures are:
Air in Pipes
Typically occurs in new systems, or after some plumbing alterations. You need to purge the air from the system. To do this
- Start at the lowest tap or valve and slowly turn on to full. If there is some spluttering leave on until the water runs smoothly then turn off.
- Go to the next lowest tap and repeat the procedure, continue working your way around the house until you reach the highest outlet.
- Don’t forget outside taps, toilet cisterns and shower heads.
Steam in Pipes
Can affect solar hot water systems and hydronic heating. Generally means the system is running too hot.
- For solar systems the first thing is to reduce the temperature for the circulation pump start. This will take the hot water from the panels at a lower temperature. If that doesn’t work it may be the storage tank is too small for the area of panels. If you can’t afford a bigger tank shading the panels on summer days can help.
- For Hydronic heating systems you will need to lower the boiler thermostat.
Insufficient Fixing of Pipes
Affect all sorts of plumbing systems. May need a combination of four different approaches
- Pack around any loose pipe clips.
- Install additional clips between existing clips.
- Install pipe insulation.
- For pipes in cavities push foam tube insulation along the pipe so it stops the pipe banging on the walls.
If the problem is a bang when you turn the tap off then you need to see the post on Water Hammer.