Licensed Plumbing Service in Central Florida
Thermal Expansion Tank Installation in Orlando & Central Florida
A closed plumbing system without an expansion tank is a system under constant stress — rising pressure can damage your water heater, pipes, and fixtures without warning. Lapin Services installs correctly sized thermal expansion tanks to protect your home and keep your plumbing system running safely for years to come.
65+ years serving Central Florida
Licensed local service team
Fast scheduling and clear communication
Service Overview
Thermal Expansion Tank Installation Backed by 65+ Years of Local Experience
When a water utility installs a backflow preventer or pressure reducing valve, your home's water system becomes "closed" — meaning heated water has nowhere to expand when your water heater runs. Every time your water heater fires, thermal expansion causes pressure to spike inside your pipes. Over time, that repeated pressure stress weakens connections, strains your water heater, triggers your pressure relief valve, and can cause leaks or premature system failure. This isn't a rare edge case — it's a code-required concern in most Central Florida homes with modern backflow prevention.
Lapin Services installs thermal expansion tanks that provide the pressure relief your closed system needs. Our licensed plumbers assess your specific system, select the right tank size, and install it correctly so pressure is absorbed safely before it causes damage. It's a straightforward solution that protects a major investment — and one of the most commonly overlooked safeguards in residential plumbing.
Problems We Solve
Common Thermal Expansion Tank Installation Problems We Fix
Here are the issues our team commonly finds and resolves during thermal expansion tank installation calls across Central Florida.
Pressure Relief Valve Dripping or Discharging
If your water heater's temperature and pressure relief valve (T&P valve) is dripping or releasing water, it's responding to pressure buildup — exactly what happens in a closed system without an expansion tank. This is a warning sign that shouldn't be ignored.
Premature Water Heater Failure
Constant pressure cycling accelerates wear on your water heater's tank lining, connections, and valves. Homeowners without expansion tanks often see water heaters fail years ahead of their expected service life — a costly problem that's entirely preventable.
Banging or Knocking Pipes
Thermal expansion in a closed system forces water back against valves and fittings with nowhere else to go. That hydraulic shock — often heard as banging or knocking in walls and ceilings — causes repeated stress on joints and connections throughout the home.
Fluctuating or Excessive Water Pressure
Pressure that spikes when your water heater runs can stress every fixture, appliance, and fitting in your home. Dishwashers, washing machines, ice makers, and faucets are all rated for specific pressure ranges — chronic overpressure shortens their lives and voids warranties.
Code Non-Compliance After Backflow Preventer Installation
Florida plumbing code and most local ordinances require an expansion tank whenever a backflow preventer or check valve creates a closed system. Without one, your system may fail inspection — or leave you liable if pressure damage occurs.
When to Call
Signs Your Plumbing System Needs Professional Attention
If you notice any of these warning signs, schedule thermal expansion tank installation before the problem becomes more disruptive or expensive.
Your Home Has a Backflow Preventer or Check Valve
If your utility or a previous plumber installed a backflow preventer — common in most Central Florida municipalities — your system is likely closed. An expansion tank is typically required and should be installed if it isn't already.
Your T&P Relief Valve Leaks or Trips Frequently
A pressure relief valve that drips, weeps, or discharges periodically isn't malfunctioning on its own — it's doing its job because pressure has nowhere else to go. An expansion tank gives that pressure a proper outlet before the relief valve has to engage.
Your Water Heater Is Older Than Expected or Fails Repeatedly
If you've replaced your water heater ahead of schedule or experienced repeated failures, unmanaged expansion pressure may be the culprit. An expansion tank is a low-cost add-on that dramatically extends water heater life.
You Hear Water Hammer or Pipe Noise When Heating Is Active
Thumping, banging, or ticking sounds from your pipes when the water heater runs are a sign of thermal expansion stress. Left unaddressed, those forces eventually loosen joints and cause leaks.
You're Installing a New Water Heater
A new water heater installation is the ideal time to add an expansion tank — it's required by code in closed systems and adds minimal cost when done alongside the heater. Skipping it at installation can cost far more in repairs and warranty issues later.
Our Process
What to Expect From Your Thermal Expansion Tank Installation Visit
Lapin keeps the process straightforward from the first call through final documentation, so you know what is happening at every step.
Step 1
Call or Schedule Online
Call Lapin Services or request service online to assess your plumbing system's pressure.
Step 2
On-Site Inspection and Diagnosis
We evaluate your closed water system and confirm an expansion tank is required.
Step 3
Honest Assessment and Recommendations
A licensed technician selects and installs the correctly sized expansion tank.
Step 4
Service Completed
We pressurize the tank, test the system, and verify pressure relief is working correctly.
Step 5
Documentation and Follow-Up
We explain the tank's function and advise on its maintenance schedule.
Why Lapin
Why Central Florida Chooses Lapin for Thermal Expansion Tank Installation
Lapin combines licensed expertise, local knowledge, and responsive service for specialty plumbing work throughout Central Florida.
65+ Years of Plumbing Expertise
Founded in 1958, Lapin has been Central Florida's trusted plumbing specialist for three generations — with the knowledge to back it up.
4.9★ Rating · 1,000+ Reviews
The best-rated plumbing company in Florida — not by our own measure, but by your neighbors who've trusted us with their homes.
Licensed Plumbing Contractor
License CFC1428594. Fully certified to handle installation, repair, maintenance, inspections, and code compliance — everything your plumbing system may ever need.
End-to-End Service
One company for all your plumbing needs. No handoffs, no finger-pointing between subs.
Available 24/7
Plumbing emergencies don't wait for business hours. Our team is available around the clock when you need us most.
Related Services
Related Services
FAQs
Thermal Expansion Tank Installation FAQs
What is a thermal expansion tank and what does it do?
A thermal expansion tank is a small pressurized vessel connected to your water supply line, typically near your water heater. When water heats up and expands in a closed plumbing system, the tank absorbs that extra volume — preventing dangerous pressure spikes that could damage your water heater, pipes, or fixtures.
Do I need an expansion tank if I have a backflow preventer?
Yes — in most cases. A backflow preventer creates a closed system by stopping water from flowing back toward the main line. That means expanding heated water has nowhere to go. Florida plumbing code and most local codes require an expansion tank in this scenario. If you’re unsure whether your home has a backflow preventer, our technicians can assess your system.
How do I know if my expansion tank needs to be replaced?
Signs that an expansion tank has failed include a waterlogged tank (it feels very heavy when you tap it), a T&P relief valve that still drips after the tank was installed, or visible corrosion and leaking. Expansion tanks typically last 5–10 years and should be inspected periodically. Our technicians check tank condition whenever we service your water heater.
What size expansion tank do I need?
Expansion tank sizing depends on your water heater’s capacity, your supply water pressure, and the pre-charge pressure of the tank. An undersized tank won’t adequately protect your system; an oversized one wastes money. Our licensed plumbers calculate the correct size based on your specific system — there’s no guessing involved.
Can I install a thermal expansion tank myself?
Expansion tank installation involves working with pressurized water lines, soldering or push-fit connections, and pressure testing — and must comply with Florida plumbing code. Improper installation can result in leaks, code violations, or a tank that fails to protect your system. We recommend having a licensed plumber handle the installation to ensure it’s done correctly and documented for permit purposes if required.
How long does expansion tank installation take?
For most homes, thermal expansion tank installation is completed in under two hours. If we’re installing the tank alongside a new water heater, it adds minimal time to the overall job. We schedule efficiently and always leave your system fully tested before we go.
Does an expansion tank affect my water pressure?
A properly installed and pre-charged expansion tank does not reduce your normal water pressure — it simply absorbs the pressure spikes that occur during heating cycles. If you’re experiencing low pressure as a separate issue, that may indicate a different problem (such as a failing pressure reducing valve) that our team can also diagnose and repair.
Does Lapin Services service all of Central Florida?
Yes. Lapin Services covers Orlando and the greater Central Florida area, including surrounding counties. Call us at (407) 326-3367 or request service online to confirm coverage in your area and schedule an appointment.
Schedule Service
Schedule Thermal Expansion Tank Installation Today
Call Lapin Services today — professional thermal expansion tank installation in Orlando and Central Florida.