With this adaptor it is possible to use common G1/4″ fittings on the Eheim 1048 pump. This adaptor can simply be screwed into the outlet of the Eheim 1048 pump replacing the original stout. (1/4″ to 1/4″ adaptor) Please note: Do not insert the adaptor ”dry” as the O-ring twists when dry and may not provide a safe seal. Therefore please moisten the O-ring before inserting the adaptor to prevent any problems. Important: Over-tightening of this adaptor may result in breaking of the plastic shell. As soon as the O-ring has contact and the adaptor is lightly hand-tightened the seal is established!