What should the water pressure be in a gas furnace? Water pressure sensors

Added: Friday, 9/18/2026


Although these are not failures that prevent the use of the installation, they can really make it difficult. Pressure drops and the complications associated with them can lead to the need for frequent water level checks and its refilling or draining. The solution to such problems can be continuous measurement of water pressure. What do you need to know about this? What role do pressure sensors play in this process? What can be the causes of pressure drops or increases? How can you effectively deal with the causes of such changes? We discuss these issues in detail in a new article.

Instalator z rozebranym piecem gazowym z czujnikiem ciśnienia wody

Check the water pressure sensors at the Onninen wholesaler

Where do changes in water pressure in a gas furnace come from?

When the water pressure sensor shows deviations from the norm, the first step should be to find the cause of the problem. The liquid pressure can drop or increase for many reasons. If the value is too low, it is necessary to check the tightness of individual elements of the installation - for example, pipes or the valve membrane may be damaged. The problem may also be caused by damage or incorrect positioning of the expansion tank.

De Dietrich C 330, C630 ECO S101784 minimum medium pressure sensor In relation to the pressure increase, it is worth looking first at the expansion tank (vessel). It should be used to compensate for the liquid pressure. Otherwise, the pressure value can increase to more than 3 bar.

When looking for the cause of pressure problems, measurement errors cannot be ruled out. The sensor may transmit false values due to incorrect assembly or damage. It also happens that the vibrations of the furnace cause damage to the connection between the sensor and the equipment. In such cases, improving the contacts may bring positive effects - after such an operation, the parameters will return to normal.

How to maintain proper water pressure in a gas furnace?

De Dietrich 7750082 water pressure sensor If the relative pressure measurement shows irregularities, actions to lower or raise it should be implemented as soon as possible. If the pressure is too low, the solution may be to top up the system with water. A large drop should prompt the boiler to be cleaned. The pressure can be lowered using the relief valve in the gas furnace or in the central heating system. In addition, regular inspections are very important. This will allow you to quickly detect any leaks and avoid long shutdowns of the system for repairs.

Water pressure sensors at the Onninen wholesaler

In the Onninen plumbing wholesaler we offer advanced models of water pressure sensors that can be used in both industry and home installations. We are a distributor of the De Dietrich brand. The French company has been one of the most valued manufacturers of heating system components for decades. Models such as the De Dietrich 7750082 water pressure sensor or the De Dietrich C 330, C630 ECO S101784 minimum medium pressure sensor guarantee high accuracy of operation and great durability and, consequently, failure-free and effective operation of the installation for a long time.

Check the water pressure sensors at the Onninen wholesaler