Tankless Water Heater Installation
Endless hot water. 20+ year service life. Flat pricing.
Tankless Water Heater Installation
Endless hot water. 20+ year service life. Flat pricing.
JMP Plumbing Services installs tankless water heaters across McKinney — both new installs in new construction and conversions from tank to tankless in existing homes. Tankless costs more upfront than a tank ($4,500-$9,000 vs $1,500-$3,500), but lasts 20+ years versus 8-12, provides endless hot water on demand, and frees up the floor space your old tank takes up. We install every major brand — Navien, Rinnai, Noritz, Rheem — and we handle the parts most homeowners don’t realize a tankless conversion needs: gas line upsize, dedicated power venting, and electrical hookup. One permit, one crew, one timeline. Flat price quote before any work starts. Trip fee waived when you move forward with the install.
Expert Tankless Installation
JMP Plumbing Services installs tankless water heaters across McKinney — both new installs in new construction and conversions from tank to tankless in existing homes. Tankless costs more upfront than a tank ($4,500-$9,000 vs $1,500-$3,500), but lasts 20+ years versus 8-12, provides endless hot water on demand, and frees up the floor space your old tank takes up. We install every major brand — Navien, Rinnai, Noritz, Rheem — and we handle the parts most homeowners don’t realize a tankless conversion needs: gas line upsize, dedicated power venting, and electrical hookup. One permit, one crew, one timeline. Flat price quote before any work starts. Trip fee waived when you move forward with the install.
Why McKinney Homeowners Choose Tankless
Endless Hot Water
Tankless heats water on demand as it flows through the unit. No tank to drain. Run two showers + dishwasher simultaneously without losing temperature (when properly sized). End of the "first person gets hot water, everyone else freezes" problem.
20+ Year Service Life
Properly maintained tankless units last 20-25 years. Tank water heaters in McKinney's NTMWD hard water last 8-12 years. Over 20 years, you'd replace a tank twice. Tankless = one install, done.
Wall-Mounted, Compact
Tankless units mount on a wall and take up the space of a small briefcase. Reclaim the floor space your 40-50 gallon tank currently eats. Especially valuable in McKinney homes with utility closets, garage corners, or basement equipment rooms.
Endless Hot Water
Tankless heats water on demand as it flows through the unit. No tank to drain. Run two showers + dishwasher simultaneously without losing temperature (when properly sized). End of the "first person gets hot water, everyone else freezes" problem.
20+ Year Service Life
Properly maintained tankless units last 20-25 years. Tank water heaters in McKinney's NTMWD hard water last 8-12 years. Over 20 years, you'd replace a tank twice. Tankless = one install, done.
Wall-Mounted, Compact
Tankless units mount on a wall and take up the space of a small briefcase. Reclaim the floor space your 40-50 gallon tank currently eats. Especially valuable in McKinney homes with utility closets, garage corners, or basement equipment rooms.
TANK vs TANKLESS
THE REAL MATH
Most McKinney homes need MORE than just a tankless unit to convert. Here's what we handle under one permit:
1. Gas line upsize (most common)
Tankless units demand 150,000-199,000 BTU on full fire — about 4x what a tank needs. Most existing 1/2″ gas lines can’t deliver that pressure. We upsize to 3/4″ or 1″ supply line, often back to the meter. This is the #1 reason botched DIY tankless installs fail.
2. Dedicated power venting
Tankless gas units use sealed combustion with dedicated PVC or stainless steel venting through the wall or roof. We install the intake + exhaust to manufacturer spec and McKinney code.
3. Electrical hookup
Tankless gas units need 120V power for the control board, ignition, fan, and display. Most tank closets don’t have a nearby outlet – We have a guy!
4. Condensate drain (high-efficiency models)
Condensing tankless units produce acidic condensate that requires a drain line to a proper drain point with a neutralizer cartridge.
5. Water filter or softener pre-treatment (recommended)
NTMWD hard water (14-16 grains per gallon) destroys tankless heat exchangers if untreated. We recommend a whole-home water softener with tankless install. Without it, descaling becomes a quarterly task instead of annual.
6. Inspection and permit.
City of McKinney requires a permit for tankless install. We pull it, schedule inspection, and document code-compliant work for your insurance and resale records.
Typical conversion timeline: 1 to 2 days depending on gas line run distance and venting complexity.
WHICH BRAND SHOULD YOU INSTALL?
We install every major brand and recommend based on your home, gas service, and demand. Quick honest summary:
Navien
Best-in-class flow rate, excellent build quality, strong rebate eligibility (varies by utility). Our most common high-end recommendation. Higher cost.
Rinnai
Industry standard for reliability and parts availability. Slightly lower flow rate than Navien at the same BTU. Solid mid-to-high option.
Noritz
Strong commercial heritage, excellent for high-demand residential. Less brand awareness than Navien/Rinnai but underrated on performance.
Rheem
Most affordable name-brand tankless. Decent build quality. Best when budget is the constraint and demand is moderate.
Navien
Best-in-class flow rate, excellent build quality, strong rebate eligibility (varies by utility). Our most common high-end recommendation. Higher cost.
Rinnai
Industry standard for reliability and parts availability. Slightly lower flow rate than Navien at the same BTU. Solid mid-to-high option.
Noritz
Strong commercial heritage, excellent for high-demand residential. Less brand awareness than Navien/Rinnai but underrated on performance.
Rheem
Most affordable name-brand tankless. Decent build quality. Best when budget is the constraint and demand is moderate.
We DON’T install no-name imported tankless units. Parts availability and warranty support are nonexistent when they fail.
Tankless Services
New Tankless Installation
First-time tankless install in a new construction or addition. Includes gas line sizing, venting, electrical, condensate drain (high-eff models), and permit.
Tank-to-Tankless Conversion
Convert your existing tank water heater to tankless. We handle the gas line upsize, new venting, electrical, removal/disposal of the old tank, and inspection.
Tankless Replacement
Replace an existing tankless unit at end-of-life or after major failure. Often faster than a new install because gas, venting, and electrical are already in place.
New Tankless Installation
First-time tankless install in a new construction or addition. Includes gas line sizing, venting, electrical, condensate drain (high-eff models), and permit.
Tankless Replacement
Replace an existing tankless unit at end-of-life or after major failure. Often faster than a new install because gas, venting, and electrical are already in place.
Tank-to-Tankless Conversion
Convert your existing tank water heater to tankless. We handle the gas line upsize, new venting, electrical, removal/disposal of the old tank, and inspection.
KEEPING TANKLESS RUNNING 20+ YEARS
Tankless lasts 20-25 years IF you maintain it. Without maintenance in McKinney’s hard water, expect 8-10 years.
Annual descaling
Critical. Circulate descaling solution through the heat exchanger to dissolve calcium scale. We do this in 45-75 minutes. Cost: $200-$400/year. Most tankless manufacturers REQUIRE annual descaling to honor the warranty.
Inlet water filter cleaning
Every 6-12 months — small screen filter catches sediment.
Flow sensor cleaning
As needed if you notice short-cycling or temperature drift.
Combustion air / venting inspection
Annual visual check for debris, blockage, moisture.
We offer an annual tankless maintenance plan that bundles all of this with priority scheduling and warranty documentation. Ask about it →
ADDITIONAL TANKLESS SERVICES
- New tankless installation
- Tank-to-tankless conversion
- Tankless replacement
- Gas line upsize (for tankless)
- Power venting installation
- Condensate drain installation
- Tankless descaling
- Tankless flow sensor service
- Tankless heat exchanger service
- Inlet filter cleaning
- Recirculation pump installation
- Outdoor tankless installation
- Commercial tankless installation
- Tankless retrofit
What Our
Customers Are Saying
Frequently Asked Questions
Tankless water heater installation in McKinney typically runs $4,500 to $9,000 depending on the unit, gas line upsize requirements, and venting complexity. Replacement of an existing tankless (when gas/venting/electrical are already in place) runs $3,500 to $6,000. We give a flat-price written quote after a free in-home estimate.
Tankless is worth it when you plan to stay in the home 8+ years, have 3+ bathrooms with simultaneous demand, or your household runs out of hot water during peak use. Math doesn't favor tankless for short stays or single-bathroom homes with low simultaneous demand. We give you the 20-year ownership cost on both options before you decide.
First-time tankless conversion in McKinney typically takes 1 to 2 days because we handle gas line upsize, new venting, electrical, and the unit install under one permit. Tankless replacement (when gas/venting/electrical are already in place from an existing tankless) runs 4 to 8 hours, usually same day.
A properly maintained tankless water heater in McKinney lasts 20 to 25 years. Without annual descaling, NTMWD hard water (14-16 grains per gallon) cuts lifespan to 8-10 years. Annual descaling is required to keep manufacturer warranties valid on most brands.
We install Navien, Rinnai, Noritz, and Rheem — the four major brands with strong U.S. parts availability and warranty support. We don't install no-name imported tankless units because parts and service are nonexistent when they fail.
Most McKinney homes need a gas line upsize for tankless. Tankless units demand 150,000-199,000 BTU on full fire — about 4x what a tank water heater uses. Most existing 1/2" residential gas lines can't deliver that pressure. We upsize to 3/4" or 1" supply line as part of the conversion.
A properly sized tankless can run 2-3 simultaneous hot water uses (multiple showers, dishwasher, washing machine) without losing temperature. Sizing depends on the unit's GPM rating and the inlet water temperature. We size based on your actual peak demand, not a generic chart.
No. Tankless gas units need 120V power for the control board, ignition, and fan. During a power outage, you'll have no hot water. If this is a concern, we can install a small battery backup or recommend a generator-ready setup. Tank water heaters with standing pilot lights work during outages — tankless do not.
Sizing depends on your simultaneous peak demand (how many fixtures run at once), inlet water temperature (cold in winter), and desired hot water temperature. A 2-bathroom home in McKinney typically needs an 8-10 GPM unit. A 3-4 bathroom home needs 11-13 GPM. We size based on actual demand, not a generic chart.
Yes. We install commercial tankless rack systems for restaurants, retail, multi-family, and small commercial in McKinney. Commercial tankless often runs multiple units in parallel for high simultaneous demand. After-hours and weekend installation available for businesses that can't shut down during operating hours.
Our Services
Service Areas
McKinney Tankless Installation — Endless Hot Water. 20+ Year Life.
Navien, Rinnai, Noritz, Rheem. Gas line upsize, venting. Flat Rate pricing.