Minimum 60cm waste height query

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Bosch washing machine drain connection height query

The problem

A new Bosch washing machine manual stated the drain nozzle/standpipe should be at least 60cm above floor level, but the existing under-sink waste connection measured about 50cm. The concern was whether this lower height would cause draining problems and whether an angled 40mm nozzle was needed to raise it.

Likely cause

The accepted reply suggested the main risk was siphoning if the drain hose is inserted too far into the standpipe, rather than the 50cm height alone necessarily causing a fault.

What fixed it

The advised action was not to alter the plumbing immediately. Fit the drain hose through the supplied shepherd’s crook/hook and only leave about 5 to 6 inches of hose protruding to enter the standpipe, so it cannot be pushed in too far and siphon water out. Only consider extending the pipe if problems actually occur.

Checks to try

• Measured existing waste/nozzle height at 50cm from floor level
• Checked new Bosch washing machine manual stating minimum 60cm waste height
• Ensure the drain hose is not pushed too far down the standpipe
• Use the supplied shepherd’s crook/hook on the drain hose

Parts or tools mentioned

• Shepherd’s crook/hook supplied with the washing machine