No by-pass necessary;No messy media replacement;Efficient Calefactio engineered media in a bag;No disconnection needed to replace media;The only condensate neutralizer that can be hard piped;Prevents corrosion by neutralizing condensate;Economical;Environment safe;Dated engineered media;Use only the sections you need;Verify condensate flowrate on your appliance. In general, 500,000 BTU/hr at 92% efficiency should generate around 1.6 Gal/hr