Aerator sound in toilets

[Babynomad]

We have an evergreen treatment plant, less than 12 months old.
The toilets make a constant gurgling sound.
After eliminating all sources, finally discovered it is the aerator noise. (Turned off the aerator and noise stopped)
Was told by plumber that this is normal, as the aerator noise is vibrating up through pipes to toilets.
Is this normal?????
Have had treatment plants in previous houses and never heard them in the toilets
Any advice appreciated
Thanks

 

[Geofd]

Never heard of evergreen treatment plant you may have to explain it to us

 

[Babynomad]

Basically a household sewage treatment plant.
Similar to taylex etc

 

[Twowaxhack]

Maybe they hard piped the air line rather than using a hose and it’s transmitting vibrations through the drain piping.

 

[sawsaw]

Taylex System
https://taylex.com.au/wastewater/secondary-wastewater-treatment-systems/

 

[Babynomad]

Fixed!
Turns out it was the sludge pump vibration through the pipes to toilets.
It has been turned right down and we can sleep peacefully