Looking after your sewage treatment plant is key to maintaining a compliant and working plant. Take a look at some Dos and Don’ts to help keep your sewage treatment plant working at its best.

Common solids and liquids that do NOT belong in the toilet or drain (!!=but unfortunately are commonly found there):Effect on your sewage treatment plant:Proper disposal:
Bird sandBlock the pipesDustbin
AshDoes not decomposeDustbin
Bird sandBlocks the plantDustbin
Backflush from water softenerContaminate  
Collecting point
Cat litterBlocks the pipesDustbin
Collecting point
CigarettesBlock the plantDustbin
Cleaning agentContaminate  
Collecting point
Condoms !!Block the plantDustbin
Cooking oilOverloads the plantDustbin
CorksBlock the plantDustbin or collection point
Cotton swabsBlock the plantDustbin
DisinfectantsKill bacteriaDo not use
Engine oilContaminates  
Collection point or petrol station
Food leftovers (solid and liquid, e.g. out-of-date  milk) !!Overload the plantDustbin
Frying oil/grease/fatsBlock the plantDustbin
Hair (insofar as can be avoided) !!Block the plantDustbin
Collecting point
Collection point or  
Nappy wipes, oily cloths !!Block the air liftersDustbin
Oily wasteContaminates  
Collecting point
Collecting point
Paint thinnerContaminates  
Collecting point
Paintbrush cleanerContaminates  
Collecting point
Pantyliners, tampons !!Block the plantDustbin
Collecting point
Pipe cleanerContaminate  
Do not use
Razor bladesBlock the plantDustbin
Sanitary towels !!Block the plantDustbin
Textiles (cleaning cloths etc.)Block the plantDustbin
Collecting point
Wallpaper adhesiveBlock the plantCollecting point
WC rim blocksContaminate  
Do not use
Wet wipes !!Block the plantDustbin

British Water Code Guidelines For Sewage Treatment Plant Maintenance

Alongside our own sewage treatment plant recommendations, British Water suggest you follow the guidelines below to maintain the health of your sewage system.


1) Think before putting anything down the sink, toilet or drains.

2) Tell guests/visitors/staff that the drains do not flow into mains drainage but into a specialist sewage treatment system and tell them how to avoid harming it

3) Read the label and use the manufacturers’ recommended doses for all household cleaning products

4) Use cleaning products little and often so the system isn’t overloaded

5) Spread clothes washing throughout the week

6) Use the same washing and dishwasher detergents and other cleaning products as being consistent will help the bacteria in the system to work more efficiently, if the products in the sewage do not vary widely the bacteria can adapt to remove a wide range of products but as this can take a while the operation of the treatment system will be more consistent if the variability of the sewage is minimised

7) Use liquid cleaners for clothes washing and for dishwashers

8) Separately dispose of sanitary towels, tampons, disposable nappies, baby wipes, cotton wool, incontinence pads, etc. and not down the toilet

9) Take out a maintenance and service contract


1) Spring clean and use large amounts of cleaners and chemicals in one day

2) Have a “washing day” – spread the washing throughout the week

3) Use household bleach and other strong chemicals indiscriminately

4) Keep changing the brands of household cleaners and washing powders

5) Tip bottles of medicine, mouth wash, etc. down the toilet

6) Put sanitary towels, tampons, disposable nappies, baby wipes, cotton wool, incontinence pads, etc. down the toilet

7) Over flush the toilet unnecessarily – use a water-saving flush if it’s fitted

8) Pour fat or grease from cooking or oil from the chip pan down the sink or drains 9) use the waste disposal unit like a rubbish bin, use it sparingly if at all

10) Pour garden chemicals or car engine oil down the drains

Need help maintaining your sewage treatment plant?

We understand that looking after your sewage treatment plant can be difficult, especially if something were to go wrong. Here at Proseptic, we have years of experience in installing, maintaining and trouble shooting a wide range of sewage systems. Our friendly engineers are on hand to offer advice and support with any issues you may be facing. Get in touch using the form below and we be sure to contact you.