Fills but does not draw

[CrikeyAussie]

I have a Clack WS1 on a 36K tank. Resin replaced 6 months ago. Rebuild 1 year ago.

Tracked down no softening to, I think, no brine draw. I cleaned injector, no obstructions, cleaned brine tank completely, made sure the little ball thingy at the bottom of the draw tube moves around. I put a few gallons of water at the bottom of the brine tank to just cover the grid plate (no salt). connected a hose to the drain line and ran a cycle, backwash was fine, plenty of water, brine cycle had plenty of water out the drain line but no siphon (water level did not drop). Fill cycle does indeed fill the brine tank with no leaks. Confused...

So I disconnect the draw tube and sucked on it and got water, more confused. I feel like Old Man Parker in Christmas Story battling the furnace.

 

[CrikeyAussie]

Additional info. I connected a bucket and some tubing to simulate the brine tank. Filled the bucket with water to a line, ran the regen cycle. While in the 60 min. brine cycle, water slowly flowed OUT of the tube. If I hadn't changed the stack in the last year or so I would say that would be the issue.

I should also mention this is a well with a 5 micron filter.

Any help would be appreciated