The two main central heating filters are MagnaClean and Sentinel Eliminator, they both have the strengths and weakness's so which is the best? In my opinion I would have to say that the MagnaClean has a slight edge over the Sentinel Eliminator, but it is only because you can see it working. When you service the MagnaClean you can clearly see all the magnetic debris on the magnet and you can tell that its working, where as with the Sentinel Eliminator you drain the water into a bucket and don't really get to see the results. But the Sentinel Eliminator not only collects magnetic debris it collects all debris floating around your central heating system.
When it comes to which is the most user friendly The Sentinel Eliminator wins hands down, because all you have to do is place a bucket under the filter, take off the cap and open the drain valve and let the water drain into the bucket. If you are a DIYer doing it yourself, your less likely to cause any damage to you property or have any leaks. With the MagnaClean because you have to take the magnet out of its housing, if the O ring seal on the cap is damaged it may not seal correctly when you put it back together, also if you spill any of the black sludge onto your carpet it can be very difficult to get back out. So when you service a MagnaClean be very cautious and take your time.