Bosch SMU 20 Serie Instructions D'installation page 16

Connecting the water supply line
The water supply line should be flushed to clear any foreign material
BEFORE connecting to dishwasher.
Make sure there are no sharp bends or kinks which might restrict
water flow.
To facilitate installation, we suggest the use of a 90 ° compression
elbow (3/8" NPT one end).
When connecting threaded pipe to the supply elbow (page 7, item E),
thread sealing tape or a pipe thread compound should be used.
Turn on water supply and check for leaks.
Fig. 16
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