Tankless Water heaters

If you’re tired of running out of hot water or you’re ready to free up space in a utility room, a tankless water heater can be a smart, efficient upgrade. John Shelton Plumbing installs, services, and replaces tankless systems for homes and small businesses across the Alle-Kiski Valley. Since 1983, our family-owned team has focused on correct sizing, clean workmanship, and code-compliant gas and venting—so your system runs safely and efficiently from day one.

Why Choose a Tankless System?

• Endless hot water: Water is heated on demand, so showers, dishes, and laundry don’t compete.
• Energy savings: No standby losses—heat only what you use.
• Compact footprint: Wall-mounted units reclaim valuable square footage.
• Long service life: With proper maintenance, tankless units often outlast standard tanks.

Right-Sizing Matters (Here’s How We Do It)

Going tankless isn’t just picking a brand—it’s matching capacity to real-world demand. We evaluate fixture counts, simultaneous uses (showers + laundry), incoming water temperature, and desired flow rates. Then we recommend models that meet your demand curve without oversizing. Correct sizing ensures faster warm-up, consistent outlet temperature, and lower lifetime operating costs.

Our Installation Process

Pre-Install Review

We inspect your existing water heater, note gas supply size and meter capacity, confirm venting options, and map condensate routing. If your project needs meter upsizing or new supply routing, our Gas Service Installation team handles it in-house.

Code-Compliant Install & Commissioning

We mount the unit, install isolation valves, complete gas and water connections, and set up vent/condensate per manufacturer specifications and local code. After pressure testing and leak checks, we program temperature set points and walk you through operation and maintenance.

Clean Work, Clear Finish

We protect floors, minimize wall penetrations, and leave the workspace tidy. Before we go, we label valves, provide documentation, and review maintenance intervals so you get the longest possible life from your system.

Maintenance & Descaling

Mineral scale is the enemy of efficiency. We install isolation valves to make annual flushing straightforward and quick. Our maintenance includes descaling, inlet screen cleaning, and a performance check. Schedule tune-ups alongside other work like Drain Cleaning for one efficient visit.

Repairs & Replacements

Experiencing ignition issues, error codes, or temperature swings? We diagnose quickly, replace worn components, and restore performance. If a unit is at end-of-life, we’ll compare repair vs. replacement so you can decide with confidence.

When Tankless Makes the Most Sense

• Households with frequent, staggered usage patterns
• Homes adding bathrooms or renovating primary suites
• Owners who value efficiency and space savings
• Properties with natural gas or LP access

Related Services

• Traditional Water Heaters – still a great fit for many homes
• Gas Line Services – safe installs, leak tests, and upgrades
• Bathroom Plumbing – fixture upgrades to match new capacity

Service hours: Mon–Fri 7:30–4:00, Sat 8:00–12:00, Sun Closed.