NEW Grundfos Pump Retainer Neck Ring 

& White gasket spacer 1-3/4" OD 405134 CRK2

OD of ring is approximately 1-3/4"  I am not 100% sure of the part number of this, but it was with other 00405134 kits.  So I assume is was part of this.

    THis is awesome and this model they do not make anymore.  You should get this, before its gone forever!   I dont see this anywhere on line

  I got this at a company overstock auction.  they opened the box and let it sit in the warehouse for a long time.  It collected dust and may show shelf wear.  This will work or money back.   PLEASE NOTE- I am not familiar with these systems. if you know more let me know!!   You are getting what you see pictured!  

FREE USA SHIP