These work on the principle of the Pythagoras cup, or "greedy cup" (and similar to a "dribble glass", except those depend on tipping the start the siphon) -- the siphon's upper end defines the maximum water level, and the intake defines the lower. A length of small plastic pipe, a couple elbows, and a compatible bulkhead union (to go through a drilled hole in the bottom of the tank) will let you build such a siphon for $10-$15 in parts (including a can of pipe cement).
The downside of a siphon style washer in a deep tank is the large amount of water required for each cycle, against the low flow needed to ensure the siphon can empty the tank while working against the inflow; your prints will spend relatively a lot of time mostly uncovered. For a deep tank, I'd prefer an overflow style, where water is introduced from below, flows upward past the prints, and then overflows into the sink or a drain hose. In a tank with dividers, this doesn't even require drilling the tank; just leave the slot nearest one tank wall vacant (with a higher divider than the rest) and run the water in there; it'll flow down, under the bottoms of the dividers, then back up and pool at the top. A very slight tilt will control where it overflows. Overflow can wash well with even lower flow rate than a siphon, in a vertical tank, and doesn't have the potential for prints to slump in their slots and contact the dividers, picking up scratches or textures or getting stuck.