AP702 is the shorter version of AP902. = > 10" dia chamber
AP703 is the shorter version of AP1003. => 12" dia chamber
If you never noticed, Deltec named their skimmer this way.
APxxy xxy will be referring to the approx height of the skimmer in mm.
y will be referring to the number of pumps.
if y = 0 then single pump
if y > 0 then y = number of pumps.
The deltec skimmers are very easy to tune, actually set, fire and forget.
I haven't touched the tunning since the day I fired it up
Very easy to clean, twist and turn to remove the cup, bring to toilet wash, all takes less than 3 mins.
Got time hop by and take a peep