Endless hot water, half the footprint. Professional tankless water heater installation in Phoenix AZ that delivers 20+ years of efficient, on-demand performance.
Gas, Propane & Electric Units
Transparent, Upfront Pricing
100% Satisfaction Guarantee
Whether your tank has failed or you are ready to stop paying to keep 50 gallons hot around the clock, tankless water heater installation in Phoenix AZ is worth considering if:
Your existing tank water heater is 10-15+ years old
You want to reclaim closet or garage floor space
Your gas bill spikes from standby heat loss
Rust-coloured water or corrosion around the tank base
You are remodelling, adding a bathroom, or building new
You want a system that lasts 20+ years instead of 10
At APES, tankless water heater installation means complete service from load calculation to final flush:
Flow rate (GPM) sizing assessment
Gas, propane and electric tankless installation
Gas line sizing, upgrade and venting
Old tank removal and disposal
Recirculation pump and point-of-use options
Tankless repair, descaling and error code diagnosis
Tankless units demand more from your gas, venting and electrical systems than a tank ever did. Here is why professional installation is essential:
Most tankless units need a 3/4” gas line and 150,000-199,000 BTU supply. An undersized line causes lockouts and short cycling.
Tankless systems require dedicated category III stainless or PVC venting. Reusing an old flue risks carbon monoxide backdraft.
Phoenix water averages 12-20 grains of hardness. Correct install includes isolation valves so annual descaling is possible, and pairing with water softener installation doubles the interval between services.
Phoenix requires permits and inspection for tankless conversions. We handle applications and inspections as part of the service.
Manufacturers void 12-15 year heat exchanger warranties on unpermitted or DIY installs.
We calculate your peak simultaneous demand in gallons per minute, check gas and electrical capacity, and recommend the right tankless model.
You receive a detailed quote comparing tankless against tank replacement, with any gas or electrical upgrades priced separately and clearly.
Our licensed technicians remove the old tank, mount and connect the new unit, run new venting, and bring gas and water lines up to code.
We verify gas pressure, check every connection for leaks, confirm venting draft, and set outlet temperature to 120°F.
We walk you through the control panel, explain descaling intervals, and register your warranty before we leave.
Stop coordinating shower schedules and paying to heat water you are not using. Trust APES for tankless water heater installation in Phoenix AZ that pays you back for two decades. Need it today? We handle emergency water heater replacement Phoenix-wide, seven days a week.
Arizona’s hard water is the single biggest threat to a tankless unit. Protect your investment:
Flush the heat exchanger with a vinegar or descaling solution to remove scale buildup from hard water, or book water heater maintenance and we will handle it.
Rinse the cold-water inlet screen quarterly to maintain full flow rate.
Keep the exterior vent clear of nests, dust and landscaping debris.
Softened water can double the interval between descaling services and extend heat exchanger life.
Note any code that appears on the display and call before repeated lockouts damage components.
Higher settings accelerate scale formation and increase scald risk.
Annual service catches combustion and flow issues early and keeps the warranty valid.
At APES, we’ve partnered with Momnt to make tankless water heater installation & repair easier on your budget. Keep the standard five-point financing block used across the site: Finance Projects Up to $55,000 · Fast Approval Process · 100% Digital Application · Flexible Monthly Payments · No Prepayment Penalties.
Finance Projects Up to $55,000
Fast Approval Process
100% Digital Application
Flexible Monthly Payments
No Prepayment Penalties
A straightforward swap where gas and venting are already adequate takes 4-8 hours. Tankless water heater installation in Phoenix AZ homes converting from a tank usually takes a full day because of new gas line, venting and mounting work.
Yes. Phoenix and surrounding municipalities require a permit and inspection for tankless installation and gas line modification. We pull permits and manage inspections as part of every job.
For most households, yes. Tankless units last 20+ years versus 10-15 for tanks, eliminate standby loss, and free up floor space. The trade-off is a higher upfront cost and mandatory annual descaling in our hard water.
Tank units commonly reach 8-12 years here, shortened by hard water sediment. Tankless units regularly pass 20 with annual descaling, which is the main reason homeowners make the switch.
Most residential models deliver 2-5 gallons per minute. A three-bath home running simultaneous fixtures may need a larger unit or two units in cascade. We size it during the consultation.
Cost depends on fuel type, GPM rating, and whether your gas line and venting need upgrading. We provide a fixed written quote before any work begins, with financing available.
Often yes for direct replacements of models we stock. Conversions from tank to tankless are usually scheduled within a few days so we have the correct venting and gas materials on the truck.
They do, but scale is the main failure cause in Phoenix. We install isolation valves on every unit so descaling is quick, and we recommend pairing with a water softener.
