WM Gold Plus 40 hw storage tank

Techman

Are dielectric unions required on the boiler/domestic connections? What metal is the storage tank made out of?

Jean-David Beyer

Are dielectric unions required on the boiler/domestic connections?

It does not say they are required in the installation manual. My installing contractor did not use any, but he is not a contractor on whom I would rely.



The storage (inner) tank is stainless steel.

The outer tank, to which the boiler is connected is a more ordinary steel.

The piping coming out of the boiler is one-inch shiny steel (not stainless), and the contractor used 1 1/4 inch black colored (not the black pipe used for gas) steel pipe up to near the closely spaced Ts, and 1 1/4 inch copper for the rest of the near boiler piping and smaller sized copper for the rest of the secondary loops. Also 1-inch copper to the indirect. I have a Plus 40 tank too.It has survived 4 years use and is not leaking. That is not long enough to prove anything, of course, but that is all the data I have.



Here is a link to the installation manual; I cannot find it on the W-M site anymore.



http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CFgQFjAB&url=http%3A%2F%2Fwww.weil-mclain.com%2Fen%2Fmultimedia-library%2Fpdf%2Fweil-mclain-pdf%2Fproducts%2Fwater-heaters%2Findirect-fired-water-heater%2Findirec_fired_water_heater_plus_indirect_fired_water_heater_manual.pdf&ei=YmCjUdbAHJPK0gHwmoDIDg&usg=AFQjCNEbm4QCG_ZT49JpPnS1vogRO1AjTg&sig2=FQo-tvpLCI15nKytQ52zXg&bvm=bv.47008514,d.dmQ&cad=rja

Techman

gold 40

Thanks JDB