heatmor or less

[fabguy01]

a neighbor of mine dropped this off for me to fix yesterday and a picture is worth a thousand words READ THE MANUAL AND FOLLOW THE WATER TREATMENT INSTRUCTIONS And this is 409 stainless

 

[brad068]

This is the same problem that I had with a whs 500. Anywhere the sediment can sit it will cause corrosion/electrolysis. You might be able to cut 1"-2" off all around the bottom and weld in some rect. or sq. tubing. Build a box frame, you don't necessarily need the water to fill the tubing just create a false bottom to maintain height or just plate over and live with the shorter height?, thinking out loud...

Weld in some couplings for future cleaning/flushing in the corners. Not real sure on how the 409 will bond with the carbon steel but it seems to work fine on some exhaust systems I fixed.

 

[DaveBP]

The term "stainless steel" is primarily a marketing term, not an engineering term. It's applied to hundreds of alloys (and now in the days of asian imported material, applied to nobody knows for sure what).
I think it is used too often to give the consumer a false sense of durability and extra value worth a higher price. Sometimes the value is there, sometimes not. Even the most exotic and expensive alloys will corrode under certain, if rare, circumstances. My 13 year-old pickup has an original exhaust system that is still in good shape. It's probably the same alloy as this boiler, 409. Different application, different result.

 

[fabguy01]

cut out a section along one side, about 1/4 inch and found no corrosion problems exept right in the corners where they weded in alittle square to make up the corners :-S . maybee they used a different grade of stainless in the corners? anyway he said go ahead and do it right so i will be cutting off about 1/4 inch all the way around the bottom and replacing it. What to use for the replacement still to be decided.