The problems that can occur due to water and sediment in fuel are well known and WASP Filters offer a wide choice of options to cover most requirements. All metal bowl units meet and exceed the requirements of ISO 10088 Annex B. Our standard model is a 3/8″ BSP port, metal bowl with 100 micron (W-30STM/D). Our most popular model in the range is the W-30STM/D-38/01 (fuel strainer, metal bowl, 3/8″ ports, 100mic element), which is often found on narrow boats and inland waterways craft. Please see tabs below for other model options and spare parts.