WP40

[DyM]

I think Tunze's are quieter but there is no better value, hands down, then these wp40 pumps.

 

[zombie]

I think Tunze's are quieter but there is no better value, hands down, then these wp40 pumps.

The wp40s are pretty quiet. If my return and skimmer are off, they are a little louder than the fans on my leds. When my return and skimmer are on, their noise is completely unnoticeable.

The joy of engineering is to find a straight line on a double logarithmic graph.