There are two types of expansion tanks used on hot water boiler systems. The steel expansion tank and the bladder type expansion tank. These expansion tanks are used to provide a cushion for the expansion of water when it is heated. Without this cushion of air the pressure in the boiler system would rise and exceed the setting on the pressure relief valve causing the pressure relief valve to open and discharge water to relieve the pressure. It is necessary to for an HVAC technician to understand how these expansion tanks work in order to properly troubleshoot hot water boiler problems which may occur as a result of an issue with an expansion tank. One of the first things to check on a hot water boiler system when the pressure relief valve discharges water excessively is the expansion tank. Continue reading “Hot Water Boiler Expansion Tanks” »
In boiler hydronic loops there are different ways to arrangement the piping depending on the budget at installation time and how efficient and balanced you want the hydronic piping system to be when the job is complete. Some piping arrangements require more pipe upon initial installation but easier to balance and provide even heat throughout all the radiators or baseboards. It is important to consult with a plumbing and heating professional before deciding which type of hydronic piping arrangement you want for your hydronic loop installation. They can show you the distinct advantages and disadvantages along with cost differences of hydronic piping arrangement for the structure where you intend on installing this system.