Drain Cartridge Repair Kit for Erie 541 and 542.
If flow to drain will not stop, it is most likely this assembly that needs to be replaced.
Old part number 529-294 and new part number 71902Drain Plunger Replacement:
1 ) Turn water off ( or By Pass Valve )
2 ) Press down on drain plunger with screw driver to open and allow any pressure on tank to flow out the drain line
3 ) REMOVE the retainer SCREW located below the "Time of Day" gear.
4 ) Lift the retainer down and away from the timer assembly.
5 ) Press down on the drain plunger to remove it from the valve body.
6 ) Install new parts in reverse.
529-219-3 ( labeled # 16 ) is the Drain Plunger Assembly
401-7 ( # 17 ) is the spring that is included,
with KIT being PN 529-294 ( new part number 71902 ).
These are the same drain parts used for the last 40 years in the Erie 541, 542 valves.