How to Fix No Water Pressure From a Hot Water Heater. Part of the series Water Heaters. Fixing no water pressure from a hot water heater will require you to first check your shut off valve. Fix hot water boiler with zero pressure air in pipes how to(plate) Turn off power to the boiler.Open all of your zone valves that run to each of your heating zones.Screw a length of garden hose to a drain spigot on the return line that runs to your boiler.Open the auto-makeup valve and the spigot to which the hose is connected at the same time.Release the auto-makeup valve and close the spigot.
The thing is the gauge on the boiler never goes above zero. There is not a gauge on the pressuretrol so I am wary to keep creeping that up without having much knowledge on boilers. It is a old ARCO boiler. I think the model is a 1902 S. Also it is a counterflow system and sadly it has no main vents questions 1. Why is the boiler pressure hot water boiler with zero pressure air in pipes how to(plate)hot water boiler with zero pressure air in pipes - how to hot water boiler with zero pressure air in pipes how to(steel) Dec 09, 2014I have a hot water boiler that has zero pressure, the cold water fill valve turned off, and air in the pipes (hearing periodic gurgling in the pipes and water circulates through the baseboard radiant units). There are two drains built into the piping connected to the boiler.