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Water Heater Installation in Plano & DFW

A water heater installation done right means correct sizing for your home, proper venting, permitted work, and no callbacks. Staggs Plumbing has installed water heaters in DFW since 1990 — written flat-rate quote before we start.

Sizing It Correctly

The most common mistake in water heater installation is undersizing. A 40-gallon tank that worked fine for a couple won’t keep up after kids are added to the household. First-hour rating — how much hot water the heater can deliver in the first hour of use — matters more than tank size alone. We calculate the right capacity for your household before recommending a unit.

What the Installation Includes

Removal and disposal of the old unit. Installation of the new water heater with proper connections. Expansion tank installation if required by your local code (most DFW municipalities require it on closed systems). Setting and testing the temperature-pressure relief valve. Testing for correct operation before we leave. City permit where required — we handle it.

Tank or Tankless?

Tank heaters cost less upfront and are simpler to service. Tankless heaters cost more upfront but deliver endless hot water and use less energy. The right choice depends on your usage patterns, your gas line capacity, and your budget. We install both and will walk you through the tradeoffs — not push you toward the more expensive option.

Everything We Offer

  • Proper sizing and unit selection
  • Old water heater removal and disposal
  • Code-compliant installation (expansion tank, PRV)
  • Gas line or electrical connection as required
  • Permit pulling and city inspection
  • Temperature and pressure testing
  • Tankless or tank — we install both
  • 2-year labor warranty on installation

Water Heater Installation in Plano & DFW — Common Questions

Straight answers before you call.

What size water heater do I need?

For a family of 1–2, a 30–40 gallon tank is typically sufficient. 3–4 people: 40–50 gallons. 5+: 50–80 gallons, or consider tankless. We calculate based on first-hour rating and peak demand, not just tank size.

Do you handle permits for water heater installation?

Yes. Most DFW municipalities require a permit for water heater installation. We pull the permit and schedule the inspection — you don't manage that separately.

What's an expansion tank and do I need one?

An expansion tank absorbs the pressure increase that occurs when water heats and expands in a closed plumbing system (one with a pressure-reducing valve or check valve on the main). Most DFW municipalities now require it on new installations. If you don't have one, we'll add it as part of the job.

How long does installation take?

A standard tank water heater replacement takes 2–3 hours. Tankless installation — which involves venting and sometimes a gas line upgrade — takes 4–6 hours. We'll give you an accurate timeline in the quote.

Can you install a water heater I already bought?

Yes. If you've purchased a unit, we'll install it. We'll also verify it's properly sized for your home and flagged if there are concerns before we start.