Originally Posted by
Robert Dalga
These units appear to be plumbed in 'series' not in 'parallel' like most units.
I see about 50/50 plumbed series/parallel.
Each plumber can describe why the way they do it is better. After having listened to both for many times, I tend to agree with the 'series installed units provide more hot water for longer' plumbers.
Moreover, unions are also missing making it that much more difficult to service the equipment.
Not really, with copper, the cold and hot just get sweated off, as does the connecting copper (in reality, the plumbers would just cut the copper, replacing the copper piece or use a coupling where they cut it). With galvanized, yes, absolutely, you would need unions.