Leaking from waste water pipe at u-bend under sink

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

Leak at washing machine drain hose connection under sink

The problem

A slight leak was reported from the washing machine waste pipe connection at the U-bend under the sink. The drain hose had been pushed onto a grey upright plastic waste spigot/pipe and the user was unsure whether it needed a clip or a different fitting arrangement.

Likely cause

The strongest supported cause is a loose seal where the washing machine drain hose fits onto the grey plastic waste pipe/spigot.

What fixed it

The accepted advice was to secure the drain hose onto the plastic waste pipe using one or two plastic cable ties tightened firmly, or alternatively a correctly sized jubilee clip. It was also suggested that plumber's tape could be wrapped around the plastic pipe first to improve the fit. Care was advised not to overtighten a jubilee clip on the plastic pipe. The discussion did not confirm that the pipework needed changing.

Checks to try

• Confirmed the leak was at the waste pipe connection under the sink
• Checked that the hose was simply pushed onto a grey upright plastic pipe/spigot

Parts or tools mentioned

• Plastic cable ties
• Pliers
• Jubilee clip
• Plumber's tape