Laing D5 wery noisy

[grandpatzer]

Before putting case together I carefuly adjusted speed to the lowest noise that could push water though system.

The pump is noisy as hell, why?!

The pump I cut out 3 thin bits of tygon and put as feet, I screwed in the pump to the bottom of case and put 2 thin tygon bits under screws as padding.

There is about 15cm air bubble, It is impossible to bleed unfortunately.

 

[Cruiza]

15cm air bubble where? What type of noise is it? How loud is very loud?