The filter candles consist of three components: single-piece filtrate pipe, perforated core with outer support rods and filter media. The filtrate pipe is the full length of the candle and ensures high liquid flow as well as maximum distribution of the gas during cake discharge. The perforated core can be a synthetic material, stainless steel or Hastelloy and is designed for the full pressure of the vessel. The outer support rods provide for an annual space between the media and the core for a low pressure-drop operation and efficient gas blowback for cake discharge.