Description
hw Fine Filter (5 µm)
The hw fine filter is the standard prefilter for hw reverse osmosis systems. Its composite material is intended for membrane technology. Use suitable filter inserts: unsuitable materials can release particles that settle on the membrane and impair its performance.
With a filtration rating of 5 µm, the prefilter retains fine particles, sediment and deposits from the water supply system, protecting the downstream membrane from particulate contamination.
Replace the fine filter according to the instructions after no more than 12 months. Check the water flow regularly; heavy contamination may require earlier replacement.
hw Carbon Filter (Activated Carbon Filter)
The carbon filter position depends on the application and feed-water quality. According to the product specification, the hw polyvinyl membrane tolerates chlorine concentrations up to 1 mg/l. In the usual configuration for Germany, the carbon filter is therefore fitted to the permeate outlet for post-treatment of the RO water.
If high chlorine levels or shock chlorination are possible in the supply network, the carbon filter is fitted between the fine filter and the membrane module to protect the membrane. Concentrations above 10 mg/l can occur during such chlorination and permanently damage the membrane. Follow your water supplier’s information and the system instructions.
Replace the carbon filter after no more than 6–8 months, regardless of the volume of water used. Prolonged use can impair water quality, including through bacterial colonisation of the activated carbon.
