There are two screws on the underside of your toilet cistern lid. You should loosen them and rotate the cap clockwise to release the push fits, then twist anti-clockwise to re-tighten and reset them for use. Make sure to tighten both, one by one; it is only tight enough after a firm “hissing” sound can be heard from all sides of the installation.
Now that you’ve replaced your push-fit plumbing fittings here’s what you can do:
1. Locate one of the coloured caps at the bottom of the toilet tank or also known as push-fit plumbing fittings 2. Underneath those plastic caps will be either green, blue or brown depending on what colour was