The AFSIL is a STANDARD CYLINDER with a THREADED ADAPTOR FOOT VALVE.
The AFRDS is a DEEP BOREHOLE CYLINDER with a THREADED ADAPTOR FOOT VALVE.
The Adaptor Foot Valve is fitted to the bottom of the cylinder to accommodate a submersible pump or extension pipes.
The Adaptor Foot Valve can be purchased separately and fitted to an existing cylinder. (Refer to the ADAPTOR FOOT VALUE assembly instructions)>