Rebuild KIT for Clack WS1 Valve ( downflow which is what 99.9% of this valve uses ).
( 1 ) V3005-02 Spacer Stack Assembly
( 1 ) V3011 Piston, Downflow
( 1 ) V3174 Brine, Regenerant Piston
For Clack WS1 Valve and other "brands" that use the Clack type of valve under their private label.V3005 ( current versions since late 2016 now list PN = V3005-02 ).
Note: The Spacers are Gray on this Standard WS1 version.
V3430 are Black and slightly larger and for WS1.25 and WS1.5.
Article = Clack WS1 or WS1.25 - How to Tell the Difference
* NOTE: This is the # 1 item to "wear out" inside the Clack WS1, and replacement is recommended if you have any "leaks to drain" when valve is in Service ( or stand by ) position.
** Drive Cap wrench
required to properly "tighten" the Cap when replacing the Spacer Stack ( typically 1 to 2 turns beyond what you can do just "by hand" ).
Failure to tighten properly can result in one of the o-rings to "pop out" and JAM the Piston... "locking up the valve" - resulting in E2, Err -102, Err -1002
* 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.