Steam System pipe hammer

Carl Weber

I have a LP steam heating system w/ 5" hg. vac. on the return side. A contractor piped a unit ventilator witha 12" rise in the cond. piping after the therm. trap. I assume that this will cause significant hammering problems, especially if the vacuum pumps go down. What is your opinion?

Thanks - Carl

gerry gill

If the vac pump goes

down, the unit heater won't work at all..why do you feel you need to run a vacuum pump? 5''hg doesn't do much..just curious...vacuum isn't consistant throughout a system..if its 5 at the vac pump it may be 2 or 3 in the supply mains..this can cause hammering in itself..

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