Purchased new and installed in hot tub for about a month before another part failed and hot tub was removed.
Model PF-20-2N22
Part 3420820-1A
3" OD inlet/outlet
2.0 HP
More info:
https://www.poolandhottubdepot.com/2hp-waterway-executive-48-230v-pf-20-2n22c4/
https://www.hottubparts.net/pf-20-2n22c4-waterway-executive-pump.html
https://www.spapumpsandmore.com/3420820_1A_Waterway_Pump_PF_20_2N22C4_PF_26_2N22C4_p/waterway34208201a.htm
The second last digit "C" or "M" in the model number only references the brand of electric motors Waterway uses on these pumps and does need to be matched on the new replacement pumps. C references Century/A.O. Smith brand motor and M references U.S. Motors brand electric motor on the pump.
If listing is up, pump is still available.
Goes for $350+ new. Price is firm. Local pickup only.