Washing machine waste not draining properly

Oliver Dawson · 6 Aug 2025

Can anyone see where this piping is wrong?

The w/m waste overflows from time to time. Also comes up
Can’t empty sink while washing machine is on.

Any info advise much appreciated

Hugh Jaleak · 6 Aug 2025

Doesn't appear to be anything wrong with the pipework per se, it's more likely blocked somewhere. Where does it go after exiting the cupboard?

accelerator · 6 Aug 2025

Have you checked the trap for blockages?

Oliver Dawson · 7 Aug 2025

I’m not sure

Hugh Jaleak said:
Doesn't appear to be anything wrong with the pipework per se, it's more likely blocked somewhere. Where does it go after exiting the cupboard?

not sure , only have a pic from customer. I’ll clean out traps. Should the waste pipe be angled to run slightly down? I was thinking it may need adjusting.

Oliver Dawson · 7 Aug 2025

accelerator said:
Have you checked the trap for blockages?

The customer has done in the past but says it comes back sooner than expected. Any idea of how often it’s expected to clear out a trap? Could a level pipe or not angled enough pipe be an issue?

CountryFan · 7 Aug 2025

Oliver Dawson said:
The customer has done in the past but says it comes back sooner than expected. Any idea of how often it’s expected to clear out a trap?

Depends on how much fat/grease goes down

Oliver Dawson said:
Could a level pipe or not angled enough pipe be an issue?

Only if a backfall, that appears ok. You need to check the waste pipe downstream of the traps.

Oliver Dawson · 7 Aug 2025

Stuckinarut said:
Depends on how much fat/grease goes down

Only if a backfall, that appears ok. You need to check the waste pipe downstream of the traps.

Good point will do thanks

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Washing machine waste not draining properly

Oliver Dawson

Attachments

Hugh Jaleak

accelerator

Oliver Dawson

Oliver Dawson

CountryFan

Oliver Dawson

DIYnot Local

Similar threads