Printable tool

Water heater replacement worksheet

Use this worksheet to document your current setup, estimate household needs, and prepare better questions for a licensed plumber.

Current water heater snapshot

ItemNotes
Current typeGas tank / electric tank / tankless / heat pump / indirect / other
Fuel or power sourceNatural gas / propane / electric / other
Tank capacity or flow rating
Approximate age
LocationBasement / garage / closet / attic / utility room / other
Venting type if gasAtmospheric / power vent / direct vent / unknown
Known problemsLeaking / rusty water / slow recovery / noise / age / code issue
Last maintenance
Emergency replacement needed?Yes / no

Household demand notes

QuestionAnswer
Number of people in home
Bathrooms
Highest-demand fixturesLarge tub / multi-head shower / laundry / dishwasher / other
Simultaneous hot water use issues
Planned remodels or additions
Current utility concernsHigh gas bill / high electric bill / running out of hot water / other

Replacement options to compare

OptionPros to ask aboutTradeoffs to ask aboutQuote notes
Standard tankFamiliar, lower upfront cost, simple replacement in many homesStandby losses, tank footprint, finite hot water
Heat pump water heaterHigh efficiency, strong fit for many electric homesSpace, air temperature, condensate drain, noise, maintenance
Tankless gasContinuous hot water, wall-mounted footprintGas line sizing, venting, flow limits, maintenance
Tankless electricCompact, no combustion ventVery high electrical demand in many homes

Installer handoff checklist

Ask each installer to confirm:

  • Recommended size or capacity and why it fits the household.
  • Whether the existing gas line, electrical circuit, venting, drain pan, expansion tank, and relief discharge piping are acceptable.
  • Whether permits and inspections are included.
  • Whether the quote includes removal and disposal of the old unit.
  • Warranty length for the tank, heat exchanger, parts, and labor.
  • Maintenance requirements, including filter cleaning for heat pump models and flushing or descaling where applicable.
  • Rebates, tax credits, or utility programs that may apply.

Leak and failure warning log

DateSymptomLocationImmediate actionProfessional follow-up
Rust-colored water
Water near tank
Popping or rumbling
Relief valve discharge
No hot water

Bid comparison

ContractorSystem typeTotal installed pricePermit includedWarrantyTimelineNotes

Red flags to slow down

  • A quote that skips permit and inspection questions.
  • A gas replacement that does not address venting and combustion air.
  • A tankless quote that does not discuss gas line capacity or electrical requirements.
  • A heat pump water heater quote that ignores installation space, condensate drainage, and air temperature.
  • Any active leak near wiring, gas piping, or structural materials.

Related guides

Reference sources