Stacker Assembly Clack WS2 V3729
Note: V3729 is Downflow Stack ( spacers and seals ) Assembly is Black in Color.
* V3729-01 is for UPFLOW and is Black and Grey in Color.
* WARNING: Do NOT lubricate this assembly. Internal o-rings are silicone, and the tolerance is already "tight". Adding any lubricant can cause the piston to "bind", and also "pull out" and damage o-rings. Also, these o-rings are NOT sold separately. So if you damage the Spacer Stack Assembly, you have to replace the entire Assembly.