The below recommended flushing capacities for BRITA Purity C Quell ST cartridges when stood for a period of non-use.

Weights of Brita Cartridges

Purity C   50 – Dimensions (W/D/H) with filter head 119/108/268 mm Weight (dry/wet) 1.0/1.6 kg

Purity C  150 – Dimensions (W/D/H) with filter head 117/104/419 mm Weight (dry/wet) 1.8/2.8 kg

Purity C  300 – Dimensions (W/D/H) with filter head 125/119/466 mm Weight (dry/wet) 2.8/4.2 kg

Purity C  500 – Dimensions (W/D/H) with filter head 144/144/557 mm Weight (dry/wet) 4.6/6.9 kg

Purity C 1100 – Dimensions (W/D/H) with filter head 184/184/557 mm Weight (dry/wet) 7.7/12.5 kg

See https://www.businesswaste.co.uk/commercial-waste-collection-costs-2021/

It is estimated that businesses in the UK are responsible for the generation of 27.5 million tonnes of commercial waste and 13.6 million tonnes of “industrial” waste every year – a whopping total of 41.1 million tonnes.

The standard landfill tax rate as of 1 April 2020 is £94.25 per tonne.

All professional filter cartridges returned to BRITA (FOC) do not go to landfill but are recycled in Germany….see how below

https://www.youtube.com/watch?v=mxBPdW2gHV8&list=PLzhwO6-T9BJ4qLPbmKKOevXLrqYZSXdST&index=4