Can't connect hose from mains to washing machine

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

Suspected misidentified washing machine connection under sink

The problem

A new washing machine could not be installed because the under-sink connection had no screw thread to match the machine’s standard fill hose. The delivery team thought it was an old-style connection.

Likely cause

The forum replies strongly suggested the visible under-sink hose/connector was not a water fill connection but a drain connection, and that the actual fill supply may be elsewhere under the sink. No fault with the new machine was evidenced.

What fixed it

The accepted advice was to identify exactly where the visible hose goes before attempting any adaptation. The strongest diagnosis was that the visible fitting was for the drain hose, which may push into or onto that connector. If it turned out to be an old fill arrangement, the recommendation was to have proper modern taps fitted by a plumber rather than trying to add a screw fitting to the existing end. The exact repair or final setup was not confirmed.

Checks to try

• Original poster to trace where the visible under-sink hose/connector goes
• Consider whether the actual fill hose/tap is tucked away elsewhere under the sink
• Compare the visible connector size with the washing machine drain hose

Parts or tools mentioned

• Cable ties
• Modern taps