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Sediment filters are used to remove solid particles from water. The simplest are the in-line cartridge type, which are suitable for treating supplies with low levels of particulate matter. Cartridges used for this purpose are available as either disposable or re-usable types, and come in a variety of mesh sizes.
Since particles contained in the water can vary in size and quantity, the assistance of an experienced water treatment advisor can help you to choose the best type for your particular situation.
There will be cases where an in-line filter is simply incapable of removing all solids from the water. Supplies where this is occurring are likely to need more specialised automatic filters, and should be assessed on an individual basis.
Where in-line sediment filters are successfully removing sediment but block up too quickly, an AUTOMATIC MULTIMEDIA FILTER can be placed ahead of the in-line filter to remove the bulk of the sediment.
Automatic multimedia sediment filters consist of a pressure vessel, containing filtering medium, together with an variable control valve programmed to initiate a self-cleaning process. Filters are normally set to self-clean at 2 am, or when water is no longer being used in the home.
Types of media
There are various types of media used for sediment filtration, quartz sand is the most commonly used.
Sediment medias will typically remove particles larger than 5 microns. However, your water treatment advisor must first establish particle sizes and their ratio to water before suggesting the most appropriate media for treating your supply.
Lifetime and maintenance
The lifetime of most automatic sediment removal filters is 0-12 years. The useful life of media will be shortened if it becomes fouled. The pressure vessel is constructed of fibreglass and the valve of tough non-corroding materials. Filters are covered by a one-year service guarantee.
While sediment filters require very little attention, there are two important considerations: (i) In the event of a power cut, the timer clock must be reset, and (ii) water pressure must not be allowed to drop below 30 psi.
From a health perspective, it is important that water quality be assessed by a qualified advisor before fitting any treatment equipment.