EC13BK: Barb Hose Connector Set
(Includes 2 Connectors, 2 Nuts, 2 Gaskets) for EC1300/EC1300U
EC2639BK: Barb Hose Connector Set (Includes 3 Connectors, 3 Nuts, 3 Gaskets) for EC2600/EC2600U/EC3900/EC3900U
EC150PVC: Replacement 1 1/2" PVC Adaptor for Eco-Clear Filters - EC2600/U, EC3900/U