O-ring for the external part of the 3/4" by-pass valve with softeners using the 3/4" World Valve

This O-ring is used on the external or outside on the plastic adapters that insert into the valve body. This is for the smaller or 3/4" World Valve.
This is not the o-ring for the internal plunger on the by-pass valve. Sears, Kenmore, GE, North Star, Tap Works, Whirlpool and Ecowater

• Buna Rubber o-ring
• Sold in singles
• Ecowater/Northstar Part # 7170288
• GE Part # WS03X10025
• Other part numbers used: 7170288, 900535, STD302213, WS03X10025, 7172793, 7310197
• Made in North America
• Also used on large sized drain elbows and the brine float assembly.

*Note if you are using 3/4" copper tail pieces/adapters you will need a difftener o-ring, Part number: 7170335, 900570 or WS60X1000