Suitable for all types of tanks with 2 "connections. Because of the flange connection, all PIUSI pumps can be easily connected to the connector without sealant paste or Teflon. Integrated filters for easy inspection. External thread is suitable for all types of 2 "inlet tanks. The inner thread is compatible with our telescopic hoses or other flexible suction hoses with hose connections. Ventilation ring or vent. The product is available in two versions: with integrated check valve and without valve.