How to Choose the Best On Demand Recirculation System
Choosing the right residential on demand hot water recirculation system is not sorcery or water magic, it’s very simple once you understand one key detail, whether your home has a dedicated return line or not. Once you know this answer then, the next key detail you will need to know is the square footage of your house – that is it.
Hot water on demand should never be a luxury…the cold water slug has become so normal in many homes that people forget you can Eliminate The Wait. Older homeowners often assume waiting for hot water is “just how the house is.” Parents with a busy household of children think the morning rush will always involve someone yelling…“The water is cold” and builders juggling new construction are focused on meeting energy code requirements without slowing down timelines and keeping within a budget.
Know Whether a Dedicated Return Line Exists
A dedicated return line is a plumbing loop (pipe) that sends unused hot water back to the water heater so hot water can reach fixtures faster.
Long-Time Homeowners:
If the home was built more than 30-40 years ago, it likely does not have a return line unless it was added during a remodel. Checking near the water heater for a third pipe can confirm it quickly. You want to check your water heater for that third pipe. A good indication for a dedicated return line is if you have a recirculation pump on your water heater. Look for a gadget that is similar to the image below, brand aesthetics will vary. If you have one, then you have a dedicated return line.
Busy Families In Condos, Townhomes, Or Newer Subdivisions:
Most of these homes do not have dedicated return lines. The reason for this is because these builds are smaller in nature roughly 1,500-2,500 SQFT and have shorter plumbing runs. Developers often skip them to reduce initial build cost but tenants of these building types – still wait for hot water.
Builders & Contractors:
New residential builds often include a return line (aka, recirculation loop) because it improves water efficiency and the convenience of getting hot water quickly. But, for those without a dedicated return line, the structural waste associated with insufficient hot water distribution systems become both costly and frustrating. To put this simply, today’s homes are built with larger floor plans and with greater distances from the water heater to the farthest fixtures than those built 30+ years ago. So, although the house is newly built, oftentimes the wait to get hot water is substantially greater when compared to older built homes.
If Your Home Has A Dedicated Return Line:
Choose a Dedicated Return Line, On-Demand Recirculation System. These systems use the return line to circulate hot water efficiently and meet energy codes, making them ideal for:
- Jurisdictions requiring recirculation systems
- Meeting energy code requirements for ‘demand’ recirculation controls, such as IECC and CA T24
- Remodels where the return line already exists or is being installed
If The Home Does Not Have A Return Line:
Choose the Under Sink Crossover System. This type uses existing plumbing and requires no structural changes which is perfect for:
- Older homes with standard or traditional plumbing
- Busy families who need faster hot water without remodeling
- Homes that have a particular problematic fixture or zone
Both system types reduce water waste, cut energy use, and eliminate long waits at sinks and showers.
Hot Water Delivered Without the Hassle
Whether finally improving long-time comfort, supporting hectic and busy families, or meeting strict building codes, the right AutoHot on-demand hot water recirculation system makes daily life easier, more efficient, and far more comfortable. Contact Us today, or give us a call direct, our team is readily available to take any calls and help you size the perfect kit for your home that will Eliminate the Wait for hot water… because we know you have more important things to do.



