How to change a pressure relief valve on a Worcester boiler

Worcester Bosch

Worcester Bosch has established itself as a heating and hot water product manufacturer industry based in United Kingdom and headquartered in England. The industry was initially discovered by Cecil Duckworth in 1962 as Worcester Engineering Co Ltd and was soon taken over by Robert Bosch GmbH in 1992 who renamed the company after his name as Worcester Bosch.

The company has marked its existence in the history so far with its mature sense of customer understanding, reliability, longevity and brand reputation that, as an outcome has resulted in successful customer experience programs and growth of the industry.

The company, for the sake, employs 2000 people across the headquarter and manufacturing plants in Worcester and operates a network of around 300 service engineers and over 80 technically trained sales managers. While the origin of Worcester group has been prominent in the manufacturing of gas and oil boilers, technological developments in renewable sources (such as solar water heating, ground source and air source heat pumps) has been made evident in the recent years.

As another factor, contributing to its brand reputation, the company operates Worcester Accredited Installer as a loyalty scheme to benefit the customers from the features such as “Find the installer search” with installers who are specialized in Worcester products and can offer extended warranties.

Not only for the sayings, but being a buyer you would inarguably be convinced with their authenticity as one of the most superior brand. Now, before leaning on how to change the pressure relief valve on a Worcester Boiler, you need to know about the Worcester pressure relief valves.

Worcester pressure relief valves

The pressure relief valve being a safety device is also known as the pressure release valve or safety valve, is a mechanical device that operates at a pre-set pressure to open up once the basic pressure of a device (that is, 3 bars) is reached. The pressure relief valve comes connected to a discharge pipe that operates to take away the pressure from the boiler in the form of hot water and release it to drain.  

The Worcester Bosch boilers are designed in a way to keep the system from operating above a certain pressure as they find this to be much dangerous. Therefore they come with a pressure relief valve that is installed in the boiler in order to ensure that the unit should not operate above these recommended levels.

Extreme pressure within a system could cause the boiler to break down so if in case the temperature and the pressure within the boiler are in the normal range and the valve is leaking, replace the defective valve right away.

How to change a pressure relief valve on a Worcester boiler

Now, this is how you could change the pressure relief valve of your Worcester Bosch boiler.

  1. Shut the boiler- To begin, first shut down the power to the boiler along with the fill valve that is meant for supplying water to the boiler system. Now, patiently wait for a few hours to let the boiler and the water cool down so you can begin to fix it.
  2. Draining- Now drain the water from the boiler to by opening the drain valve in order to reduce the pressure. Once you can see the pressure on the gauge reduced to zero, close the valve to stop the drainage.
  3. You would now need to attach a pipe wrench to the boiler’s pressure relief valve. Loosen the valve and remove it from the boiler and if the valve has come with a drain pipe attached, then remove it too prior to the valve.
  4. Further, you would need to wrap a plumber’s tape around the whole of the new pressure relief valve except of the two bottom threads. Now put the new valve inside the boiler and tighten it with the pipe wrench. Do make sure that the new valve should be straight and pointed in the same direction as the old one while turning it into the boiler. Reconnect the pipe if required in any case.
  5. You are almost done. Just open the fill valve and bleed valve to refill the system with the water and bleed the air out of the system, respectively. Restore power to the boiler.

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