re drains etc, this is advice from Lanes For Drains:
What cannot be washed down the drain?
In particular, the following items – which we call the Big Offenders – are known to be major causes of clogged pipes, and should never be put down the drain or toilet:
•Food waste
•Fat, oil and grease (FOG)
•Plastic bags
•Nappies
•Sanitary towels, including tampons, applicators and wrappers
•Cotton buds
•Condoms
•Bandages and plasters
•Baby wipes
•Cleaning wipes
•Razor blades
•Medicines, needles and syringes*
*These should be taken to your local pharmacy or heath authority for safe disposal
All of these are common culprits when it comes to blockages, whether they are localised to the drainage system of an individual home, or come in the form of a giant fatberg clogging up an entire sewer. It’s particularly dangerous to flush away old medical supplies – they need to be taken to a local pharmacy or health authority for safe disposal.
What to watch out for in the kitchen
When working in the kitchen, it’s most important to avoid putting any waste food, cooking oils, fats, coffee grounds or anything solid down the drain – scrape these into the bin instead. Although they often wash down the plughole easily enough, they will inevitably end up creating a blockage further down the pipes.
What to watch out for in the bathroom
Although it might seem like an easy thing to do, you should avoid flushing wet wipes, kitchen roll or anything other than toilet roll when in the bathroom; the same also goes for cardboard toilet roll tubes, cotton buds and dental floss.