The water heater generates sizzling water via way of heating cold water within the inner tank. If the water high quality isn't always good and contains sediment, particles, etc., after the interior tank is heated to extreme temperature for a long time, it is easy to supply scale and cause blockage, that won't just trigger damage to the water heater, but also influence the shower. experience. Warm reminder: The pre-filter is installed at the cold water of the water heater. It can filter and purify the water from the supply and preserve the water heater. Filters sediment, crimson worms, algae and diverse impurities to double keep washing machines, water heaters, clever toilets, etc. Pre-filtration, anti-scaling and purification of each drop of tub water. The pre-filter can filter out maximum of the big particles and impurities in faucet water and make bigger the provider life of water-related appliances. faucets: Product features: 40um precision filter/strong, transparent, hot temperature resistant and explosion-proof filter out cup size: eleven x 8 x 5cm Material: pvc colour:B-White Package Contents: 1 x Water Purifier Only the above kit content, diversified products usually are not included. Note: Light reflection and diversified exhibits may cause the color of the article in the photo a little bit diverse from the genuine thing. The size allowed error is +/- 1-3cm.