The dip tube has three notches to indicate the water level. The intensity of traction depends on its quantity.
The purge valve has a very unusual design: it has three holes and is deeply recessed into the base. It looks interesting, but does not add any "special effects" to the purge.
A shaft made of precision (seamless) pipe used in the space and aviation industries;
Base and saucer with corrugated bottom made of stainless steel;
