Stop Running Out of Hot Water Mid-Shower
Tankless Water Heater Installation in Greer for homes that consistently run out of hot water during peak use
Pro Plumbing installs tankless water heater systems in Greer for homeowners who need continuous hot water without waiting for a storage tank to refill. You notice the problem most during morning routines when multiple people shower back-to-back or when running the dishwasher while someone bathes. A tankless system heats water on demand as it flows through the unit, eliminating the recovery time that leaves you standing under cold spray halfway through a rinse.
The installation involves removing your existing tank, mounting a compact wall unit that takes up significantly less floor space, and connecting gas lines or electrical circuits sized to match the unit's demand. Proper sizing matters because an undersized heater will struggle during simultaneous use, while an oversized unit wastes energy. Pro Plumbing calculates your household's peak flow rate by counting fixtures that run at the same time and measuring the temperature rise needed from incoming groundwater to your target output temperature.
If you are tired of cold showers or want to reclaim closet space currently occupied by a bulky tank, reach out to discuss which tankless model fits your home's layout and hot water patterns.
What Changes After the New Unit Is Installed
You will notice the difference immediately when the hot water never runs out, even during extended use. Tankless units heat water only when you open a tap, so there is no standby energy loss from keeping 40 or 50 gallons warm around the clock. The unit mounts on an interior or exterior wall, freeing up the floor space where your old tank sat, and the digital controls let you set precise output temperatures.
After installation, your monthly energy costs typically drop because the system operates only during active demand. Pro Plumbing ensures the gas supply line or electrical panel can handle the instantaneous load, which is higher than a tank-style heater but shorter in duration. You also gain a longer service life, as tankless units often last 20 years compared to the 10- to 12-year span of traditional tanks.

The work includes flushing and descaling the unit annually to prevent mineral buildup, especially in areas with hard water. If your home has low flow rates or you plan to run more than three fixtures simultaneously, a larger unit or multiple units may be necessary. The installation does not include water softening systems, though pairing the two extends the heater's lifespan.
What You Should Know Before Upgrading
Homeowners often ask about the upfront cost, how the system performs during simultaneous use, and whether their existing plumbing requires updates. Here are answers to the most common questions.
What size tankless unit do I need for a four-person household?
You need a unit that delivers at least 7 to 8 gallons per minute if two showers and a sink run at once, adjusted for the temperature rise between incoming groundwater and your desired hot water setting.
How long does installation take?
Most installations take four to six hours, including disconnecting the old tank, mounting the new unit, running or upgrading gas or electrical lines, and testing all connections for leaks and proper ignition.
Why does the water take a few seconds to heat up?
Tankless units activate only when flow is detected, so there is a brief delay while the burner or heating element reaches full output, and you still wait for hot water to travel from the unit to the fixture through your existing pipes.
Can I install a tankless heater in Greer without upgrading my electrical panel?
Not always—electric tankless models draw significant amperage, so homes with older 100-amp panels often need an upgrade, while gas models require adequate venting and may need a larger diameter gas line.
What happens if I skip annual maintenance?
Mineral deposits accumulate inside the heat exchanger, reducing efficiency and flow rate, and eventually causing the unit to overheat and shut down, which shortens its lifespan and voids most manufacturer warranties.
Pro Plumbing walks you through sizing, fuel type, and venting requirements during the estimate. If your household uses a lot of hot water at once or you want to eliminate the footprint of a storage tank, contact us to schedule an installation consultation in Greer.