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Proper water filtration significantly extends the service life of water systems and appliances and reduces maintenance costs. And autumn is the ideal time to upgrade filters and clean them. The winter months bring low temperatures, intermittent loads and increased water contamination. All of this increases the demands on filtration.
Backwash filters are designed for various water systems – heating systems, water distribution from private sources, as well as industrial applications or irrigation systems.
They contain a mesh screen that captures mechanical impurities such as rust, sand, sludge, scale or organic residues. This protects pumps, valves, fittings, thermostatic mixer taps, household appliances and industrial technology from clogging and failures.
Water filters for households and industry are manufactured with different mesh fineness, which is why they have a very wide range of applications. They are suitable for water with varying levels of contamination and different requirements for outlet water quality.
According to the maintenance method, water filters are divided into manual and automatic. What are the differences between them, and when should you choose which solution?
A manual backwash filter is a purely mechanical device installed on the pipework. It contains a screen with the required mesh fineness that traps impurities. Maintenance consists of manual cleaning of this screen. Neglected maintenance can lead to reduced flow rate or even blockage of the pipework.
Thanks to their low price and simple installation, manual backwash filters are a suitable solution for households with a private water source. They are also suitable for occasional operation, for example in holiday properties, or for seasonal cleaning of heating water in a family home.
A simple and effective Honeywell manual filter
With simpler filters without backwashing, before cleaning it is necessary to shut off the water using valves upstream and downstream of the filter. Then remove the screen from the filter and clean it with a jet of water. The screen must be cleaned by flushing only. Using brushes could damage it.
A more advanced solution is a manual water filter with a backwash function. You start the flush simply by opening the flush valve, from which water along with impurities will flow out. So you do not need to shut off the water or dismantle the filter.
Fully automatic backwash filters are completely maintenance-free. They are connected to control systems that start the backwash automatically at set intervals, so you do not have to think about cleaning the screen at all. If necessary, you can of course start cleaning at any time.
The cleaning itself is most often carried out using nozzles or reverse water flow. The water with impurities drains directly to waste, so there is no water leakage from the system.
Automatic backwash filters are used in industry, but also in commercial buildings with high-traffic operation and in households with high demands for living comfort. They are also an ideal solution for water with a higher level of contamination, as backwashing can take place daily if required and the filtration capacity is practically unlimited.
Especially in demanding industrial applications, the return on investment in automatic backwashing is very fast, sometimes even less than a year, thanks to operating savings. In practice, the annual costs of maintaining a manual backwash filter in a production hall may be as follows:
Annual costs can therefore rise to CZK 200,000, which roughly corresponds to the price of automatic industrial filtration including installation.
Backwash automation for SYR filters
In addition to the method of cleaning the screen, it is important to consider the water flow rate and the level of contamination – i.e. how many and what size mechanical impurities the water contains. Depending on particle size and the required outlet water quality, you need to choose the optimal mesh fineness.
It is not true that the finer the mesh, the more effective the filtration. A mesh that is too fine will clog unnecessarily often and reduce the flow rate.
Also consider the filter materials and its resistance, for example to high temperatures or aggressive substances.
In our range you will find compact filters for households as well as robust solutions for industry from leading global manufacturers such as Honeywell and SYR. For less demanding applications, a good choice is, for example, the inexpensive but effective Honeywell FK06-1/2AA sediment filter for cold water.
The SYR DRUFI semi-automatic backwash filter offers an optional connection size, so it is widely used especially in residential buildings. To automate maintenance, the filter can be retrofitted with backwash automation.
If you are unsure about choosing a water filter or you are looking for a specific solution for your needs, do not hesitate to contact us. We offer expert consultations for all products and will design a tailored solution for you.
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