Pressure and Temperature gauge on hot water or hydronic heating boilers: this gauge displays the heating boiler internal pressure and temperature. Typical pressure for a residential boiler serving a two story home would show 12 psi cold, and less than 30 psi hot.
How to check the water pressure on an ideal boiler If you have the ideal Logic + or the ideal Vogue then you will see your pressure gauge right on the front of the user interface. It is the most left dial on the front of the Logic + boiler, and the small circular dial on the far right of the ideal Vogue.
As with any hot water or heating appliance, a hot water boiler system requires a constant pressure flow to maintain the optimum temperature. Hot water boiler systems are equipped with a pressure gauge and an automatic pressure reducing valve that will add water to the system if the pressure drops.
locate the pressure gauge or tridicator on the boiler or piping and read what the pressure is if there is no gauge or it is not working use the pressure gauge on and drain valve and open the valve most boiler should be between 12-20 psi, any more than 20 psi is dangerous and can lead to problems and water leaking.
Josh shows you how to check, bleed and fill your boiler system, along with a description and visual of the components and an explanation of safe operating pressures.
The boiler's automatic filling system controlled by the pressure-reducing valve should maintain the proper water level at 12 to 15 psi. If there is no pressure-reducing valve, you can manually feed the boiler by opening up the water feed valve until boiler pressure reaches 12 psi.
The water pressure indicator on the front of your boiler should read between one and two bars of atmospheric pressure. If it is below one, then your boiler pressure is too low. To top up your system and increase the pressure, you will need to locate your filling loop.
The water pressure in a hydronic boiler shouldn't be over 12- to 15-psi. It should have only enough pressure to raise the water a few feet above the top of the highest point in the piping system. A 12-psi setting will lift water 28' above the fill valve.
Boiler pressure is one of the most common faults associated with the heating system, however there is an easy fix. When the heating system is cool, the pressure should be between 1 and 1.5 bar on the pressure gauge. Watch our video on how to repressurise your system here.
If the pressure gauge on your boiler indicates high pressure (above 2.75 bar), then you may need to bleed a radiator to bring the level down to around 1.5 bar. This can be tricky and, occasionally, dangerous; due to high water temperatures.