How to Prepare Your Rental Boiler

| Power Mechanical
Boiler Sight Glass for Low Water Monitoring

Redundancy inside a boiler room is critical

Redundancy is a term often used in mechanical and boiler room design. Redundancy is simply a reliability measure that is factored in when designing systems to ensure that should something fail, be in regeneration mode, being maintained or the like, there is a backup. Boilers rely on sufficient and reliable feedwater supply. Thus it is rare to find where commercial and industrial boiler applications do not have complete redundancy in their feed systems. 

A duplex feed system will have two pumps installed, whereas a triplex has three, and so on. The number of pumps is determined by the capacity requirements for the system. Some systems may need two pumps simultaneously to most effectively deliver the required boiler water. The minimum requirement times two gives the system the needed redundancy. 

Feed Pumps on a Deaerator

It’s important to not overlook the necessity for switching over the lead and the lag of these pumps. This can help facilities to identify if a pump has a problem meeting load requirements or other common issues related to boiler feed pumps. If a pump sits idle and the lead pump fails a standby pump could be useless and unable to provide sufficient boiler feed.

Periodic switching over from each pump ensures that the demand is met and redundancy is in place in the event of a failure. A weekly rotation of boiler feed pumps is a good practice to ensure that these pumps are providing sufficient boiler feed and maintaining system redundancy. 

When switching boiler feed pumps over the first step is to ensure that the operating pump is meeting demand. A daily boiler room log is a common practice to monitor these pressures and keep an eye out for any negative trends in feed requirements. Keep in mind that load conditions will create a variable on what the pressure range may read for the pump at any given time. Again, this is where the log can be helpful in determining what is the “norm”.

Pump redundancy is a boiler room design consideration that most critical systems have in place. Having the pump at the ready is important to minimize downtime and increase reliability. If the boiler feed pumps are not being regularly switched over, it’s comparable to having a spare tire in your trunk with no air in it. In other words, should the time come that the backup is needed, there’s no such thing. 

If your facility needs any boiler feed system maintenance, parts, diagnosis, or replacement contact Power Mechancical Inc. today. We have been assisting facilities with ensuring reliable boiler room operations for nearly four decades. With a complete line of new and refurbished boiler feed pumps, along with pump repair facility, we’re here to ensure your plant has complete redundancy in all your mechanical systems. 

When preparing for a rental boiler delivery, It’s important to take assess all possible complications that may occur prior to the boilers delivery. As the old saying goes, “An ounce of prevention is worth a pound cure.” Making the proper site preparations and verifying all the critical utility components before the arrival of the rental boiler can save your organization downtime and money.

While it’s impossible to predict all possible problems that can show up. Taking a strategic approach toward preparation for a temporary boiler can at the very least, ensure that some of these common problems with boiler sites are mitigated early.


Now from an operational standpoint, it is critical that the boiler is level for proper operation. Choose a site that is solid, stable, and as flat as possible. Cribbing can be used to put the final touches on leveling the boiler, however, the flatter the area the better off the site will be. Additionally, on the subject of fencing, ensure that there is ample room on each side of the boiler to access panels and any connections.

Now these connections are extremely important to consider. From the incoming fuel, the steam connections, hot water supply, and return, electrical, make up water and a handful of other variables all should be taken into account. Where these incoming power and utilities are accessible tend to drive the decision on where to place a rental boiler and its worth mentioning that these connections can often be extended with rental power cables, pipe spools, adapters, and other accessories.

Power Mechanical Inc. stocks a full line of rental accessory and connections equipment.

  • Double Wall Oil Tanks from 500 gallons – 20,000 gallons
  • Switchgears, Starters, Transformers, Variable Frequency Drives, Electric Power Cables
  • Pipe Spools, Reducers, Adapters, Braided Steam Hoses
  • Heat Exchangers and Pumps
  • Steam Silencers
  • And Much More!


Be mindful about freeze protection with any of the lines outside of your rental boiler. Heat trace, insulation, unit heaters, and good practices should be used to ensure that your boiler and connected equipment doesn’t freeze in these winter months. A frozen boiler can become a big problem fast, so when preparing for a rental boiler, ensure you plan accordingly for proper freeze protection

The unit heater installed in a Power Mechanical rental boiler has a thermostatic setting that allows the unit to engage automatically at certain setpoints. Keep a close eye on these units to ensure they are functioning properly as this is a primary safeguard for the boiler should it go offline. In the event that the boiler shuts down, it ensures that your interior lines don’t freeze up.

As always, do not hesitate to call should you have any questions regarding the arrival of your rental boiler. We want to ensure that your rental period is seamless, safe, and as worry-free as possible. Even if you chose a temporary boiler from another provider and have some unanswered questions on your site or set up, give us a call for all your rental boiler needs!

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