No hot water · Not enough heat · Leaks · Noises — Gas, Electric, Heat Pump & Tankless
What Type of Water Heater?
Diagnostic Steps
Estimated Repair Cost
FL Repair vs. Replace Guide
Florida hard water (8–20+ GPG) accelerates scale buildup and anode rod depletion. Storage tank lifespan in FL is typically 8–12 years — 20–30% shorter than the national average.
Age 0–5 yrs, in warrantyRepair — call manufacturer
Age 5–9 yrs, minor repairRepair cost-effective
Age 9–12 yrs, major partRepair or replace (your call)
Age 12+ yrs, any issueReplace — near end of life
Tank corrosion / inner rustReplace immediately
Repair cost > 50% of newReplace — better ROI
New unit cost (40-gal gas)$900–$1,600 installed
New unit cost (50-gal elec)$850–$1,450 installed
New heat pump WH$1,400–$2,800 installed
FL Water Heater Repair Cost Guide
Repair costs include FL labor. DIY parts only for reference — many repairs require a licensed FL plumber.
Thermocouple / Thermopile Replacement
Gas tank water heaters — pilot won't stay lit
DIY Part
$10–$35
Pro Labor
$80–$175
Total FL
$95–$210
FL humidity corrodes thermocouples faster than dry climates. If pilot relights but won't stay lit after 30 sec, thermocouple is almost certainly the cause.
Gas Control Valve / Thermostatic Valve
Gas tank water heaters — no heat or pilot issues
DIY Part
$75–$175
Pro Labor
$125–$250
Total FL
$200–$425
If repair cost exceeds $300 and unit is 10+ years old, replacement may offer better value. New 40-gal gas unit installed = $900–$1,600.
Heating Element Replacement
Electric tank water heaters — no hot water or lukewarm
DIY Part
$15–$45
Pro Labor
$100–$200
Total FL
$115–$245
FL hard water (common 10–20 GPG) causes scale buildup on elements, reducing efficiency and lifespan. Curved/screw-in elements designed for hard water last longer. FL attic installs make element access harder — adds $50–$100 labor.
Thermostat Replacement (Electric)
Electric tank — no hot water, tripping breaker, scalding
DIY Part
$15–$35
Pro Labor
$75–$150
Total FL
$90–$185
T&P (Temperature & Pressure) Relief Valve
All types — dripping, discharging, or open T&P valve
DIY Part
$15–$55
Pro Labor
$85–$175
Total FL
$100–$230
⚠️ T&P valve discharging is a safety event. Could indicate overpressure (no expansion tank), overheating thermostat, or T&P valve failure. Do NOT plug or cap the T&P valve — it can cause a tank explosion. FL code requires discharge pipe terminating within 6 inches of floor or draining to exterior.
Anode Rod Replacement
All tank types — rotten egg smell, rust, extending tank life
DIY Part
$25–$65
Pro Labor
$75–$150
Total FL
$100–$215
FL hard water depletes anode rods 2–3x faster than soft water areas. Replace every 2–3 years in S. FL vs 4–6 years nationally. Magnesium rods cause H2S odor when sulfur-reducing bacteria is present — switch to aluminum/zinc in that case.
Dip Tube Replacement
Gas and electric tank — suddenly not enough hot water, plastic bits in water
DIY Part
$10–$30
Pro Labor
$85–$175
Total FL
$95–$205
Broken dip tube allows cold incoming water to mix with hot at top of tank — causes sudden drop in hot water capacity. White plastic bits in aerators confirm dip tube failure.
Tank Flush & Delime / Descale
All FL tank water heaters — popping/rumbling sounds, efficiency loss
DIY
$15–$35
Pro Service
$100–$200
Tankless
$150–$300
FL hard water creates 1–2 inches of sediment in 5–8 years. Annual flushing recommended in S. FL. Tankless units need descaling every 1–2 years in hard water areas — scale is the #1 cause of premature tankless failure in Florida.
FL Water Heater Replacement Costs
Unit Type
Unit Cost
Installed FL
40-gal Gas Tank
$450–$900
$900–$1,600
50-gal Gas Tank
$550–$1,100
$1,050–$1,800
40-gal Electric Tank
$350–$750
$750–$1,350
50-gal Electric Tank
$400–$850
$850–$1,500
Heat Pump WH (50-gal)
$900–$1,600
$1,400–$2,800
Gas Tankless (whole-house)
$700–$1,400
$2,000–$4,500
Electric Tankless (whole-house)
$500–$1,100
$1,800–$3,800
FL attic installations add $150–$400 to labor costs. Attics require drip pans, float-activated shut-off valves per FL Plumbing Code §504.7. Expansion tanks required in all FL closed systems per FPC §607.3.
FL Water Heater Code Requirements
Permit Required: FL requires a permit for all water heater replacements (not just new installations). An unlicensed installation can void your homeowner's insurance and trigger a stop-work order.
Governing Codes
FPC §501General water heater requirements
FPC §504.6T&P valve discharge requirements
FPC §504.7Attic & elevated installations
FPC §607.3Expansion tank requirement
FL Energy Code §R404.1Water heater efficiency standards
NFPA 54 §7.13Gas water heater venting
NEC 422.11Electric water heater disconnect
FS 489.105CFC license required
FL-Specific Code Items
Permit Required?Yes — for all replacements
Licensed ContractorCFC or plumbing license required
T&P Valve DischargeWithin 6" of floor or to exterior
Expansion TankRequired in all closed systems
Attic Install Drip PanRequired with float shut-off
Seismic StrapsNot required in FL
Gas Sediment TrapRequired on gas supply line
Min Efficiency (elec tank)EF 0.90+ for <55 gal
Min Efficiency (gas tank)EF 0.62+ for <55 gal
Inspection Required?Yes — before closing walls
FL Permit Costs by County
County
Permit Fee
Miami-Dade
$150–$350
Broward
$100–$250
Palm Beach
$100–$225
Hillsborough
$95–$200
Orange
$85–$185
Pinellas
$85–$175
Duval
$75–$150
Other FL County
$65–$175
FL Attic Water Heater Requirements
Over 40% of Florida homes have water heaters installed in the attic. FL Plumbing Code §504.7 has specific requirements for these installations.
Drip Pan Required?Yes — must drain to exterior
Pan Drain LineMin 3/4" to exterior or drain
Float Shut-off ValveRequired in pan drain
Secondary Drain PanRecommended for insurance
Access ClearanceMin 30" x 30" working space
Attic Install Labor Add$150–$400 extra
Get a Free Water Heater Quote
Same-day emergency service — repairs, replacement, permit filing. FL-licensed plumbers serving all South Florida counties.
Why Call a FL-Licensed Plumber?
FL License Required?Yes — CFC or plumbing CPC
Permit Pulled?Yes — we file for you
Inspection Scheduled?Yes — we arrange it
Same-Day Availability?Yes — for emergencies
Hard Water ExpertiseAnode, delime, scale protection