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WM 78 series steam water / mud leg bound up
Have a Weil McLain 78 series steam boiler. I'm replacing the seals that are rotted out- the wet return/ mud leg ( bottom most water passage about 3") is plugged solid with thick sludge that I litterly have to chisel out with hammer drill. I can get the passage cleared out but obviously there is much fouling beyond what's readily accessible- apparently the chemical treatment did no good. I've heard once I got it back together I can circulate muratic acid to clean it out but onl heard have never talked with anyone who's actually done it. Was thinking of rigging up some piping system using an old hot water heater as a receiver of sorts and circulating with a small pump like bg nf22 or whatever and keep blowing it down till it seems clean. do U think the pump would hold up to the acid? Who's done this with success? When I say plugged I mean plugged solid like concrete- even though I have it apart replacing all the sections isn't an option. See attached pics. Please advise. Thanks
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