Purchase Tankless
Tankless Water Heater Installation in Pittsburgh PA
WJ McNabb Plumbing brings you straight facts about tankless water heaters. These powerful systems cut energy costs by 24% to 34% when homes use 41 gallons or less of hot water daily. Pittsburgh homeowners love the endless hot water supply and 20-year lifespan these units deliver.
Many homeowners upgrade to tankless during a water heater replacement when their traditional tank system begins to fail. Older tank water heaters often require additional plumbing components such as expansion tank installation to meet modern plumbing codes and protect the home’s water pressure system.
Shopping for Tankless Water Heater
Upgrade to Tankless/On-Demand System
Pittsburgh's winter temperatures demand professional installation to ensure peak performance through our cold seasons.
WJ McNabb Plumbing helps you pick the right tankless water heater for your home. Our 40+ years of plumbing expertise means we match you with the perfect system and handle every installation detail.
Let us walk you through your tankless water heater options - from selecting the right model to professional installation that keeps your system running at peak efficiency. All backed by our 100% satisfaction guarantee.

Tankless Water Heater Types for Pittsburgh Homes

No hot water? Call us at (412) 388-2512 for an estimate!
Our hands-on experience shows two main types work best for local homes: condensing and non-condensing models.
Navien Systems We Trust
Our plumbers choose Navien condensing units for their rock-solid performance. These systems hit efficiency ratings up to 0.96 UEF, thanks to dual stainless steel heat exchangers and ComfortFlow® technology. The NPE-2 series keeps hot water flowing at 11.2 GPM - perfect for families who need reliable hot water.
Gas or Electric: What Works Best?
Gas tankless units pump out more hot water – usually 5-10 GPM compared to electric’s 2-5 GPM. While gas needs proper venting and gas lines, it handles Pittsburgh winters better than electric. Our licensed technicians regularly perform gas water heater installation and tankless upgrades for Pittsburgh homes that need higher hot water demand.
Right-Sizing Your System
Our 40 years of plumbing taught us these sizing rules:
- Single bathroom (1-2 people): 140,000 BTUs does the job
- Two bathrooms (2-3 people): Step up to 190,000 BTUs
- Three bathrooms (3-5 people): You'll need 380,000 BTUs
Pittsburgh's winter groundwater hits 47°F, so your system needs muscle to reach that perfect 120°F shower temperature.
We'll treat your home like our own while finding the perfect tankless water heater for your family. All backed by our 100% satisfaction guarantee.
Trust Our Certified Team
WJ McNabb Plumbing brings every certification you need:
- Factory-trained by Navien
- Allegheny County Licensed
- DOT Gas Line Certified modification experts

What You Need to Know Before Buying a Tankless Water Heater
Our four decades of plumbing work taught us what matters most in tankless water heater selection. Here's what Pittsburgh homeowners need to know.
Energy Savings You Can Trust
The numbers tell the story - tankless units cut energy use by 24-34% when homes use 41 gallons or less daily. We've seen condensing models hit UEF ratings between 0.85 and 0.96, perfect for Pittsburgh winters.
Getting Installation Right
Your tankless system needs proper setup for peak performance. Gas units demand:
- 3/4-inch gas line minimum
- Category III stainless steel venting (condensing units can use PVC)
- Pressure relief valve for safety
Electric units need 120-volt power source. We handle all specifications to code.
Expert Tankless Water Heater Installation in Pittsburgh
Most tankless installations take 4-6 hours with our two-person expert teams.
Installation Rules
Pittsburgh demands proper permits and safety standards for every tankless water heater job. Our certified plumbers handle all building codes, venting specs, and gas line requirements. Indoor jobs need extra care with venting, while outdoor setups give us more options.
Keep Your Tankless Water Heater Running Strong
Your tankless water heater works hard for your home. These systems serve Pittsburgh for 20 years when properly maintained.
Strong Warranty Protection
Navien stands behind their systems with rock-solid coverage - 5 years on parts and 15 years on heat exchangers. Most home installations see warranties stretch to 12 years for heat exchangers and 5 years for parts. Essency Tankless Water Heaters are made to last 30+ years!
Pittsburgh's Expert Service Team
WJ McNabb Plumbing handles all your maintenance needs:
- Yearly descaling stops mineral buildup
- Filter cleaning and replacement
- Heat exchanger and burner checks
- Water pressure testing
Smart Maintenance Choices
Keep your warranty strong with regular service. Most Pittsburgh homes need yearly tune-ups. Watch those recirculation systems - controlled loops keep full warranty coverage, while uncontrolled setups drop to three years.
Just like we've done for four decades, we'll treat your tankless system like it's in our own home. 100% satisfaction guaranteed.
Your Premier Pittsburgh Plumber for Tankless Water Heaters
Four decades of Pittsburgh plumbing work built WJ McNabb Plumbing into what we are today. Our second-generation family business masters tankless water heater installations, especially Navien condensing systems.
Our Promise to You
Every job comes with our word - 100% satisfaction guarantee. Our plumbers pass strict background checks and drug tests, keeping your home safe while delivering clean, skilled installations.
McNabb Plumbing Expertise
Your tankless water heater deserves our full attention:
- Complete home assessment and system sizing
- Thorough testing after install
- Regular maintenance planning
Our service reaches across Pittsburgh's neighborhoods. From Robinson Township to downtown, we serve zip codes 15136, 15204, 15205 and beyond.
READY FOR YOUR TANKLESS WATER HEATER? CALL (412) 388-2512
Not enough hot water? Call to schedule an estimate!
Are you postponing repairs because of the cost? Our licensed professionals guarantee high-quality service, upfront pricing, and 100% satisfaction. On top of all of this - we are family budget friendly.
