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Black Steel 10 year old 2.5 inch main (Before) Copy

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Black Steel 10 year old 2.5 inch main (Before) Copy

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Seattle, WA 98108

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Galvanized Weld Seam Corrosion (Before)

leak from preaction system main

Black Steel 10 year old 2.5 inch main (Before) Copy

6 year old galvanized dry pipe main

ILD installed on preaction main Copy

Black Steel 10 year old 2.5 inch main (After) Copy

installed ECS nitrogen inerting vent on wet system

Black Steel Dry System Main Copy

Wet Pipe Corrosion Trapped Air Pocket

dry system corrosion high temp environment 1 Copy

pgen 5 installed in preaction closet

Galvanized Weld Seam Corrosion (After)

Galvanized Main Corrosion

25 year old wet system Copy