Watts OneFlow+ (OneFlow Plus) OFPSYS Salt-Free Scale Prevention and Water Filtration System

Replacement for the discontinued Pelican NaturSoft. Watts lists the tank-based OF744-10 as discontinued; the current residential OneFlow lines are this cartridge OFPSYS and the tank OFRES-K series (OFRES-0835 8 gpm $990.87, OFRES-0935 12 gpm $1,108.60, OFRES-1035 16 gpm $1,324.12 at Supreme Water Sales). Price from Supreme Water Sales (no compare-at); Lowe's and Watts Premier's own store premierh2o.com show about $789 in search listings but both blocked fetches, so unverified. Cert caveat: the only listing is WQA NSF/ANSI/CAN 372 (lead-free materials); Watts' own spec sheet says the sediment, chlorine taste and odor reductions are 'not tested or certified by WQA'. No NSF listing for OneFlow or OFPSYS. The flyer's 'Rated most effective scale prevention technology' cites the 2013 WateReuse Research Foundation study of salt-free alternatives in general, not an OFPSYS test; a DVGW W 512 report on OneFlow media circulates on Scribd but Watts does not publish it for this model, so hardness stays 'claimed'. Limits: hardness up to 30 gpg, pH 6.5-8.5, 10-90 psi, 40-100 F, free chlorine under 2 ppm, iron under 0.3 ppm, manganese under 0.05 ppm, copper under 1.3 ppm (new copper lines must passivate 4 weeks), phosphates under 3 ppm, silica under 20 ppm (not treated), oil and H2S removed first. Must be the last treatment stage except POU filters; not a softener, soft-scale spotting may still occur. Dry weight 16 lb, service weight 28 lb. No Watts affiliate program found. Trustpilot watts.com is unclaimed (2.8 from 5 reviews, brand-wide). Retailer reviews (Lowe's, Menards, Amazon) blocked, so no complaint data.