Hot Water Takes Forever? Hot Water Recirculation Systems for San Diego Homes
- 19 hours ago
- 9 min read
Does your shower take forever to get hot? Does your kitchen faucet run for a minute or longer before hot water arrives? Are you tired of wasting water while waiting for it to heat up?
Slow hot-water delivery is a common plumbing complaint, especially in larger and custom homes where the kitchen, primary bathroom, guest bathrooms or other fixtures may be located a considerable distance from the water heater.
Fortunately, the water heater itself may not be the problem—and replacing it isn't always necessary.
A properly designed hot water recirculation system can significantly reduce the amount of time it takes hot water to reach your faucets and showers. Depending on your home's existing plumbing, a hot water recirculation pump may be added to a traditional tank water heater, incorporated into a tankless water heater or connected to an existing dedicated hot-water return line.
At CF Plumbing, Inc., we install, repair and troubleshoot hot water recirculation pumps, tank and tankless water heaters and hot-water delivery systems throughout La Jolla, Del Mar, Solana Beach, Encinitas, Carlsbad and Rancho Santa Fe, along with surrounding communities throughout San Diego County and Orange County.
Why Does My Hot Water Take So Long to Get Hot?
If you're standing at the shower wondering, “Why does my hot water take forever?”, the water heater itself may be operating normally.
When no hot water has been used for a while, the water sitting inside the hot-water piping between your water heater and the fixture begins to cool.
The next time you turn on the hot water, that cooled water has to leave the pipe before newly heated water can reach the faucet or shower.
The farther the fixture is from the water heater, the more cooled water may be sitting inside the piping—and the longer you may have to wait.
This is especially noticeable in larger homes and custom plumbing systems where the primary bathroom, upstairs bathroom or kitchen is far from the water heater.
Homeowners frequently ask us:
Why does my shower take forever to get hot?
Why does it take so long to get hot water upstairs?
Why does my master shower take so long to get hot?
Why does one shower get hot faster than another?
Why does my bathroom take longer to get hot water than my kitchen?
Why do I have to run the faucet before the water gets hot?
How can I get hot water to my shower faster?
How can I get hot water faster at my kitchen sink?
Why am I wasting so much water waiting for hot water?
Can I get faster hot water without replacing my water heater?
Do I need a hot water recirculation pump?
The correct solution depends on why the hot water is taking so long and how the home's plumbing was originally designed.
What Is a Hot Water Recirculation System?
A hot water recirculation system, also called a hot water recirculating system, circulation pump or recirc pump, is designed to keep heated water closer to the fixtures where you use it.
Without recirculation, you turn on a faucet or shower and wait while hot water travels from the water heater through the piping to the fixture.
With recirculation, water can be circulated through the plumbing system so there is less cooled water sitting between the water heater and the fixture when hot water is needed.
A properly configured hot water recirculation system can provide:
Faster hot water at faucets
Faster hot water at showers
Less time waiting for hot water
Less potable water running down the drain
Improved convenience in bathrooms and kitchens far from the water heater
But not every recirculation system works the same way.
The home's existing plumbing configuration determines which options are available.
What Is a Dedicated Hot Water Recirculation Line?
The preferred plumbing configuration is generally a dedicated hot water recirculation line, sometimes called a dedicated hot-water return line.
A dedicated return provides a separate path for water to circulate back toward the water heater instead of using the home's cold-water piping as the return path.
If your home was originally constructed with a dedicated recirculation line, we generally want to take advantage of it.
However, many existing homes throughout San Diego County and Orange County weren't originally plumbed with a dedicated hot-water return.
That doesn't necessarily mean you're stuck waiting for hot water.
Yes.
In many homes, hot water recirculation can be added to an existing tank water heater.
This can be a practical solution for homeowners who are happy with their current water heater but frustrated because hot water takes too long to reach a distant shower, bathroom or kitchen faucet.
An external hot water recirculation pump can often be installed at the water heater.
If the home doesn't have a dedicated return line, a crossover tee or check tee may be installed at an appropriate fixture, often at or near the farthest fixture from the water heater.
This allows us to create a retrofit recirculation system using existing plumbing instead of installing an entirely new dedicated return pipe through finished walls and ceilings.
What Is a Crossover Tee or Check Tee for Hot Water Recirculation?
A crossover tee or check tee can provide a return path for a hot water recirculation system when a home doesn't have a dedicated hot-water return line.
We typically evaluate the plumbing layout and the fixtures located farthest from the water heater to determine the appropriate crossover location.
The system can then use the home's existing cold-water piping as part of the return path for recirculation.
Think of it as creating a retrofit—or “faux”—recirculation return using plumbing that's already inside the home.
For many existing houses, this can be considerably more practical than opening walls, ceilings and other finished areas to install a new dedicated return line.
Is a Crossover Recirculation System as Good as a Dedicated Return Line?
Not exactly.
A properly installed crossover recirculation system can significantly improve hot-water delivery, but it isn't identical to a true dedicated recirculation return.
Because the system uses existing cold-water piping as part of the return path, there are limitations.
Depending on the plumbing configuration and how the system is controlled, you may temporarily notice warmer water on the cold side at the crossover fixture.
That's why we explain that an external recirculation pump with a crossover tee is a retrofit solution.
It may not provide the same performance or control options as a properly designed dedicated recirculation system, but in many existing homes it can be a substantial improvement over waiting—and wasting water—every time someone wants to take a shower or use a faucet.
Can I Add Hot Water Recirculation Without Opening My Walls?
Often, yes.
That's one of the biggest advantages of a crossover-style hot water recirculation system.
If installing a new dedicated return line isn't practical, we can evaluate whether an external recirculation pump and crossover/check tee can utilize the home's existing plumbing.
This may allow homeowners to get hot water to distant fixtures faster without opening finished walls throughout the house.
Every home is different, however.
Pipe layout, water-heater location, fixture locations, plumbing branches and the distance to the farthest fixtures all affect how well a retrofit recirculation system will perform.
This is why we evaluate the plumbing before recommending a specific solution rather than simply installing a pump and hoping for the best.
Why Is My Hot Water Recirculation Pump Not Working?
If you already have a recirculation system but suddenly find yourself waiting longer for hot water, don't automatically assume you need a new water heater.
The problem may actually be with the hot water recirculation system.
Potential problems can include:
Failed hot water recirculation pump
Failed or restricted check valve
Crossover valve or crossover tee problems
Timer or control settings
Temperature sensor problems
Air or circulation problems
Restricted flow
Dedicated return-line problems
Tankless water heater settings
Recirculation controls that aren't configured correctly
We've worked on plenty of hot-water complaints where the water heater was doing exactly what it was supposed to do.
The problem was somewhere else in the hot-water delivery or recirculation system.
Proper troubleshooting means evaluating the entire hot-water system, not automatically replacing the biggest piece of equipment.
Absolutely.
In fact, built-in hot water recirculation is one of the features we particularly like about certain Navien tankless water heaters.
One misconception we frequently hear is:
Not necessarily.
Tankless means the water is heated on demand rather than stored inside a large tank. Once heated, that hot water still has to travel through the piping between the tankless water heater and the faucet or shower.
If your primary bathroom is a long distance from the tankless water heater, you can still wait for hot water without an appropriately designed and configured recirculation system.
That's why we look at the water heater and the home's hot-water delivery system together.
Why We Like Navien Tankless Water Heaters With Built-In Recirculation
When an existing water heater is approaching replacement age, we often discuss whether upgrading to a Navien tankless water heater with built-in recirculation capability makes sense for the home.
Rather than adapting a separate external pump to an existing tank water heater, compatible Navien models incorporate recirculation capability into the water-heating system.
This gives us additional options for configuring hot-water circulation based on the home's plumbing.
When paired with the appropriate plumbing configuration—whether an existing dedicated return line or a compatible retrofit configuration—integrated recirculation can provide an efficient and convenient approach to hot-water delivery.
For homeowners already frustrated because the shower takes forever to get hot, replacing an aging water heater is an excellent opportunity to address two issues at the same time:
How should we heat the water, and how should we get that hot water to the fixtures efficiently?
You don't necessarily need to replace a functioning tank water heater just because you want faster hot water.
If your existing tank water heater is in good condition, adding an external hot water recirculation pump may be a practical solution.
If the water heater is already approaching replacement age, however, that's when it makes sense to look at the entire system.
Instead of replacing the tank and then adding another external component, homeowners may want to compare that option with a tankless water heater with built-in recirculation.
When evaluating tank versus tankless, we consider:
Existing water-heater condition and age
Home size and plumbing layout
Distance to the farthest fixtures
Existing dedicated recirculation piping
Hot-water demand
Household usage
Available gas, electrical and plumbing infrastructure
Installation requirements
Long-term plans for the home
There isn't one water-heating or recirculation solution that's best for every house.
Will a Hot Water Recirculation Pump Save Water?
One of the biggest benefits of hot water recirculation is reducing the amount of potable water that goes down the drain while you're waiting for hot water to arrive.
Think about how often someone turns on a shower, bathroom faucet or kitchen sink and simply lets the water run until it becomes hot.
In a larger home with long plumbing runs, that can happen multiple times every day.
A properly configured hot water recirculation pump can reduce that waiting period and the associated water waste.
For Southern California homeowners concerned about water conservation, reducing unnecessary water waste can be an important added benefit.
This is particularly common in larger homes.
The primary bathroom may simply be located at the opposite end of the house from the water heater.
Long plumbing runs mean more cooled water is sitting between the water heater and the shower. Before newly heated water can reach you, that cooled water has to leave the pipe.
That's why “my master shower takes forever to get hot” can be a plumbing-distribution problem even when the water heater itself is operating normally.
A properly designed recirculation system may be able to improve hot-water delivery without changing anything at the shower itself.
Hot Water Recirculation for Larger & Custom Homes
Hot-water delivery becomes particularly important in larger and custom homes with multiple bathrooms, large primary suites, guest wings or kitchens located far from the water-heating equipment.
CF Plumbing regularly works in homes throughout Rancho Santa Fe, La Jolla, Del Mar, Solana Beach, Encinitas and Carlsbad, where plumbing layouts can be considerably larger or more complex than those found in smaller homes.
With decades of hands-on plumbing experience, we've worked with a wide range of hot-water systems, including traditional tank water heaters with external circulation pumps, dedicated hot-water return systems, crossover configurations and tankless water heaters with integrated recirculation.
Before recommending a solution, we look at the existing water heater, plumbing configuration, distance to fixtures, existing controls and whether the home has a dedicated recirculation return.
The objective isn't simply to install a pump.
It's to determine why you're waiting for hot water and which solution makes sense for the way your home is actually plumbed.
Hot Water Recirculation Pump Installation & Repair in San Diego County
CF Plumbing, Inc. provides hot water recirculation pump installation and repair, recirculation system troubleshooting, tank water heater service, tankless water heater installation and Navien tankless water heater service throughout La Jolla, Del Mar, Solana Beach, Encinitas, Carlsbad and Rancho Santa Fe.
We also provide specialized plumbing service throughout surrounding communities in San Diego County and Orange County.
If you're experiencing any of the following:
Hot water takes forever to get hot
Shower takes too long to get hot
Kitchen faucet takes forever to get hot
Primary or master shower takes too long to get hot
Hot water takes too long upstairs
One bathroom takes longer to get hot than another
You're wasting water while waiting for hot water
Your hot water recirculation pump isn't working
You want to add recirculation to an existing tank water heater
Your house doesn't have a dedicated hot-water return line
You're considering tank versus tankless
You want a tankless water heater with built-in recirculation
You need Navien tankless water heater or recirculation service
we can evaluate your existing hot-water system and explain the available options.
When Expertise Matters
Tired of waiting for hot water?
Text CF Plumbing, Inc. photos of your existing water heater for the fastest assistance. Let us know which bathroom, shower or faucet takes the longest to get hot and whether your home currently has a recirculation pump.
We'll help determine what's causing the delay and the best next step for your plumbing system.
Navien Tankless Water Heater 
Bradford White Tank Water Heater with Grundfos Recirculating Pump
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