Intake mechanisms with side connections

Side

— a side-entry fill valve connects to the cistern wall above the waterline and fills it with a top-down stream. Pros — easy installation, compatibility with older and budget cisterns, simple maintenance without removal. Cons — more noticeable noise and a risk of splashing if you don’t lower the guide tube below the water surface. Suitable for standard floor-mounted toilets where price and serviceability matter more than acoustic comfort.