Our filters come with a range of end fittings to suit different housings and applications. End caps are available with a variety of seal materials, including EPDM, Buna-N, Silicone, Viton and FEP Silicone.

double open-ended doe filter end fittings
Double open-ended (DOE) cartridges usually employ a knife-edge mechanism on both ends of the cartridge with compression to create a seal. They are commonly used for non-critical, general purpose filtration and pre-filtration.
Amazon code 2 filter end fittings
Code 2 style incorporates 2 x 226 ‘O’ rings and bayonet, with a flat blanking cap at the the cartidge’s closed end.
Amazon code 3 filter end fittings
Code 3 utilises 2 x 222 ‘O’ rings at the open end and a flat blanking cap at the closed end. Common in industrial and pure water applications.
Amazon code 6 filter end fittings
Code 6 has 2 x 020 ‘O’ rings located on a spigot in the housing. The recessed closed cap at the other end allows the cartridge to be centralised in the housing.
Amazon code 7 filter end fittings

Code 7 uses 2 x 226 ‘O’ rings and a double bayonet, with a spear on the closed end. This is the standard configuration for many critical pharmaceutical and beverage processes.
Amazon code 8 filter end fittings
Code 8 has the same ‘O’ rings as Code 3, but with a spear (bomb-fin) at the closed end.
Amazon code 9 filter end fittings
Code 9 style has a single 213 internal ‘O’ ring, and the same recessed closed cap as Code 6.
Amazon code A filter end fittings
Code A has a double ‘O’ ring at the open end and a spear at the closed end. Typically used for critical applications.
Amazon code B filter end fittings
Code B uses a double ‘O’ ring at the open end and a flat blanking cap at the closed end. Common configuration for industrial applications.
Amazon code S filter end fittings
Code S combines 2 x 222 ‘O’ rings with a 3 lug bayonet, and has a spear at the closed end.