Thoughts on Assembling WM Boiler from Sections

dkirkwood

Hi,

I am homeowner and have contracted with a plumber to replace my steam boiler with a new Weil Mclain EG45. The access to the basement is very problematic, so it looks like ordering a knockdown boiler and moving the sections into basement, then and assembling the block in place from the sections is the safest way to go.

Anyone who has assembled a block from sections have any tips? Particularly, any concerns/tips regarding getting the sections to align and pull together, and any issues with leaks during hydrostatic test?

The procedure looks straightforward on paper, but interested in any advice those with experience may have.

Jamie Hall

If I recall correctly, the sections have O rings between them. HOWEVER they are not round cross section — they are square. It is easy to twist them, and the boiler may seem to seal properly with a twisted ring, but it won't — and the ring will be ruined. If the leak doesn't show up right away, it will soon enough…

So. Be verry careful, if it does have the square section O rings, to make sure they are not twisted and that they fit correctly in their grooves!!!

Otherwise… pretend it's a cylinder head when torquing the bolts holding it together. Don't just crank one down all the way and go onto the next. And use a torque wrench!

EBEBRATT-Ed

For someone who has done it before and follows the directions it isn't an issue. The block should be tested with a water pressure test at 1.5 x the working pressure so 23psi for steam and 45psi for water normally.

Intplm.

When using rope seal, I like using spray adhesive rather than the glue with a brush-on applicator. It makes for a less messy, easier install.

pecmsg

it’s done all the time.
how experienced is the installer.