SI SPAN: Use with SPA700G gasket to adapt DD6 pump to GEMŽ cap tanks (8-1/4" diameter coarse threads).
Add SI SPA700R (2" FPT & 3/4" FPT - for manual recirculation);
or SI SPA700RA (2" FPT & 3/4" FPT with one way check valve for auto recirculation when nozzle valve is released, recirculation continues) for use with 2" MPT pumps.