wedge wire filter candles can be used:

For direct filtration  As medium support (for example diatoms in pre-coat filters)
The filtration capacity can be modified easily by varying the number of candle filters to obtain the required filter area.

Cleaning

A stronger flow in the backward direction, known as backwash, cleans the candle filters effectively.

Maintenance

Because the filter elements are particularly rigid and rugged, they can be disassembled without risk of damage to the filter surface
wedge wire filter candles are filter elements with the following qualities:
Small diameter usually less than 1.97 in. (50 mm)
Substantial length usually greater than 39.37 in. (1,000 mm)
Very fine openings: 20 to 150
microns, according to the application