Pop-Up valve with with External Sleeve that rides over 1-1/4 inch piping inside the machine. This valve is used on 1.5 cuft and larger machines with a 4" opening that were manufactured after June 1983.
Model 1642, 1648, 2443 & 2452 Item # 3
Model 2016 Item # 12
WetBlast flex Item #11
Clemco Part #03699
See the bottom of the product manuals for diagrams of additional compatible products.