3/4" In and Out tank closure 890S or D7171. Fits standard tank openings.Includes the top of tank o-ring ( V3180 - Note: old models used o-ring 3410381 ) and the 13/16" distributor o-ring ( 3410244 ).
older ...... fits around the threads 10381 ( 2 7/8" O.D. x 1/8" thickness )
Commonly used on whole house carbon tanks and acid neutralizing tanks.If you need the Top Distributor with this new head, you can use the "twist and snap" into place 13/16" version ( our PN MD1203-01 )
