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The Top 10 Things to Check if that Steam System is Hammering

Kristine

Dans_Tip_Steam_Sys_Hammering
1. The near-boiler piping doesn’t meet the manufacturer’s specs
2. The steam quality is bad (wet steam causes hammering)
3. The boiler is oversized or overtired.
4. The insulation is missing from the piping.
5. The Hartford Loop connection is too close to the waterline, or has a nipple
that’s too long.
6. The mains are sagging or not properly dripped.
7. It’s a gravity-return system with motorized zone valves
8. The radiator supply valves that one-pipe system are throttled.
9. The steam traps are broken
10.On a boiler replacement, someone turned a wet return into a dry return.

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