New Low Pressure Gauge

Mark N · December 2009

After reading about low pressure gauges here on the wall. I decided to install one. The one I have is 0 to 3psi. I ran the boiler, it ran a normal cycle about 25 min. The gauge only rose to the first line, about .1 psi. I though something was wrong so I closed all the rad valves and ran the boiler again. The pressure quickly rose to 1psi. I turned off the boiler, no problem with gauge. Next time the boiler ran I observed the gauge again. Same thing pressure rose to first line and fluttered slightly. Is it possible to only raise .1psi at the boiler and heat the house with no problems.

Mark

jpf321 · December 2009

indeed it is

my antique boiler must fire 40-50mins before I hit my cut-out of 6oz. (375sq ft EDR system) your rad vents won't close until all rads are heated fully across. don't forget that as the steam is condensing on cold surfaces, it creates a mini-vacuum.

as it gets colder outside, you will have more heat loss and the probability then that the t-stat will not be satisfied as quickly as now. in which case, your boiler will run longer and therefore have the opportunity to heat the rads all across and close all the vents and raise the pressure above 1oz.

New Low Pressure Gauge

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