Distillation the quality of distilled water is not related to the quality of the source water! Will produce consistent quality regardless of the quality of the source water. Model:TC503 is a larger system and with a 40 lits storing tank practically suitable for small and large family.It is Automatic fill water and Automatic shut off when storing tank is full. Maxpure TC-503 Specification: ~ Size: 49 cm(L) x 33 cm(W) x 55 cm(H) ~ Distillate capacity: 48 litres in 24 hours ~ Storing tank: 40L ~ Heating element: 1000 watt, 120V/240V AC Features: Recommend for: Home ?18 people ; Office ?40 people Connected to your faucet in your home High grade stainless storing tank Distilled water sensor Residue discharge valve