Plumber Supply House Recommendations for Tankless Water Heaters
Introduction: Why My Tankless Recommendations Save You Time, Money, and Headaches
I’m Rick Callahan—Master Plumber, 25+ years on the tools, and Product Expert at Plumbing Supply And More. I’ve installed, serviced, and specified thousands of water heaters across tight condo closets, 20‑story mechanical rooms, and custom homes with eight baths plus body sprays. When folks ask for Plumber Supply House Recommendations for Tankless Water Heaters, they’re really asking: which units won’t let me down, what will pass inspection the first time, and who’s going to support me when things get weird? That’s where I—and our team—come in.
Here’s the difference you’ll feel right away: Unlike generic big box retailers, Plumbing Supply And More stocks professional-grade components, matches systems to actual site conditions, and stands behind every spec. When Home Depot or Lowe’s can only give you a SKU, I’ll give you a model number that fits your gas line, vent path, water quality, and usage—plus the isolation valves and condensate kit you’ll wish you had on day one. We’re the nearest plumbing supply with real knowledge, serving contractors throughout the region with same-day delivery inside a 50‑mile radius and emergency supply runs when the job can’t wait.
You’ll also see me reference search terms customers use all the time: folks typing “ plumbing supply near me,” “ plumbing supply house near me,” or “ plumbing supply store near me” usually end up at our counter—and they stay because we deliver professional guidance, not guesswork.
Gas vs. Electric Tankless: How to Choose Without Regrets
If you’ve got natural gas available, a condensing gas tankless is still king for whole‑home applications. Typical residential selections range from 150,000 to 199,000 BTU with 9–11+ GPM at a 35°F rise. You’ll get steady hot water with reasonable electrical demand (most units just need 120V, 3–5 amps for controls). For smaller condos or where service upgrades are costly, electric tankless can make sense—but only if your panel can support the amperage.
Gas tankless sweet spot: Rinnai RUR199iN, Navien NPE-240A2, Noritz NRC98-DV-NG, Rheem RTGH-95DVLN-3. Expect $1,500–$2,800 for the unit. Electric tankless: Stiebel Eltron Tempra 24 Plus, EcoSmart ECO 27, Rheem RTEX-27. Units typically $500–$1,000, but watch the electrical: the ECO 27, for instance, draws up to 112.5A at 240V on three 40A breakers with 8 AWG conductors. If your service is 100A total, you’re not a good candidate.
Pro tip: If you’re on LP with tight delivery schedules, size a buffer by stepping up a model and add a small recirculation loop for kitchens far from the unit. We stock the right pumps and timer kits, so ask my team to build your cart with all necessary parts.
And yes— While other suppliers focus on quantity, Plumbing Supply And More prioritizes quality and expertise—we’ll look at your water hardness, fixture load, incoming winter temps, and clearances before we recommend a model.
Right-Sizing Tankless: GPM, Delta-T, and What Specs Really Mean
Don’t size to the brochure. Size to your coldest inlet temps and simultaneous demand. In the Mid‑Atlantic, winter incoming water can hit 40–45°F. If you want 120°F at the shower, that’s a 75–80°F rise. A “10 GPM” unit at 35°F rise will only provide 5–6 GPM at 75°F rise—enough for two showers and a dishwasher, maybe, but not four showers and a tub fill.
Here’s how I do it on a walkthrough:
Count simultaneous fixtures realistically (teens home at 7 am? body sprays? soaking tub?). Calculate total GPM draw at 2.0–2.5 GPM per shower, 1.5 GPM lavs, 2.5–3.0 GPM tub. Check rated flow at your design delta-T (we keep spec sheets at the counter and online).
Examples I trust:
Rinnai RUR199iN (199k BTU): ~11 GPM at 35°F rise; ~6.5 GPM at 70°F rise. Internal recirc-ready. Navien NPE-240A2: similar performance; flexible venting; built-in buffer tank and pump for anti‑cold‑water‑sandwich. Noritz EZTR40: great for tank-to-tankless swaps; adapters simplify vent reuse.
Insider secret: When you’re on the line between two sizes, bump up the BTU if you have the gas line. The field service calls I’m asked to fix aren’t about “too much capacity.”
Venting, Gas Lines, and Code: Get It Right the First Time
Most call-backs come from two issues: undersized gas lines and sloppy venting. Follow NFPA 54 (National Fuel Gas Code), the appliance manual, and your local amendments. Our local plumbing supply expertise means we’ll review your plan against the UPC/IPC in your jurisdiction and highlight inspector red flags before you’re on-site.
Gas line sizing: Many 199k BTU units require 3/4" minimum up to ~20–30 feet, then 1" depending on pressure and total load. We’ll run the numbers with you—bring your manifold length and other appliance BTUs. Venting: Condensing units typically use 2" PVC up to 60–65 feet equivalent; some need 3" beyond that. Non‑condensing often requires Category III stainless (4"). Don’t wing it—elbows count. Combustion air: Follow clearances and louver sizing. Direct vent is your friend in tight mechanical closets. Condensate: Route to an approved drain with a neutralizer. We stock Axiom, DiversiTech, and Little Giant pumps for basements.
Pro tip: Buy the manufacturer’s service/isolator valve kit with the heater. It saves hours later. We pair Takagi T‑H3‑DV‑N units with Webstone service valves and a neutralizer kit on nearly every order.
Water Quality, Scaling, and Recirculation: Quiet Performance Beats Flashy Specs
I tell every property manager the same thing: your tankless is only as good as your water chemistry. Above ~12 grains hardness? Install scale control. Choose either a softener or a media-based conditioner like Watts OneFlow (OFA-140) or Rinnai ScaleCutter. Manufacturers require descaling in hard water—skip it and you’ll see flow drop and error codes.
Recirculation options:
Internal pump (e.g., Rinnai RUR series, Navien “A” series) with dedicated return line or thermal bypass valve at the far fixture. External pumps: Grundfos Comfort or Taco 006e3 on a timer/aquastat to control energy use.
Service intervals: Annual descaling with food-grade phosphoric acid or vinegar, 45–60 minutes via isolation valves. We carry complete kits—ask our counter for the pump/bucket/chemical bundle.
And if you’re searching for a “ heating plumbing supply near me” that actually stocks descaling gear year-round, you’ve found it. Compared to standard plumbing supply houses, Plumbing Supply And More offers unmatched technical support when the scale sensor trips at 4 pm on a Friday.
Rick’s Picks: Proven Tankless Models I Trust on Real Jobs
When contractors ask for Plumber Supply House Recommendations for Tankless Water Heaters, these are the units I’ll still be happy to see in 10 years:
Rinnai RUR199iN (Natural Gas, 199k BTU, 0.96 UEF, Wi‑Fi ready, internal recirculation). Tight modulating control and consistent parts availability. Street price range: $2,100–$2,600. Navien NPE-240A2 (condensing, 199k BTU, built-in pump/buffer, 2" PVC vent up to long runs). Flexible venting and great for multi‑bath homes. $1,900–$2,500. Noritz NRC98-DV-NG (180k BTU, robust heat exchanger, compact). Dependable for 2–3 baths in colder climates. $1,400–$1,900. Rheem RTGH-95DVLN-3 (199k BTU, condensing, easy control interface). Solid distributor support. $1,500–$2,100. Stiebel Eltron Tempra 24 Plus (electric, 24 kW, 2–3 baths in warm climates or point-of-use). Demand-based control is best in class. $700–$900.
Need commercial-grade? The Rinnai Demand Duo or cascading Navien NPE units serve hotels and multifamily plants reliably. Our commercial plumbing supply team can spec flue gas common venting and control logic, with submittals and O&Ms turned around same day.
Installation Timeframes, Costs, and What Affects Your Budget
Here’s what I tell homeowners and GCs during a walk-through:
Straight gas tank to gas tankless swap, same wall, short vent run: 6–8 hours. New tankless with 2–3 elbows, condensate pump, and gas upsizing: 1 full day. Electric tankless with panel upgrade and new feeders: 1–2 days plus inspection.
Budget ranges:
Gas tankless equipment: $1,100–$2,800. Isolation valves, venting, condensate kit: $200–$600. Labor: $1,200–$3,500 depending on scope and region. Electric tankless: $500–$1,000 for unit; panel/service upgrades $1,500–$3,500+ if needed.
If you need a letter for the HOA or building department, we’ll package the spec sheet, gas line calc, venting diagram, and condensate neutralization detail. That’s where we shine: When Home Depot and Lowe’s fall short, contractors trust Plumbing Supply And More for complete, code-ready submittals and same‑day pickups.
Procurement: How to Source Smarter and Avoid Jobsite Delays
We keep what pros actually need. That’s not an accident—it’s 25 years of knowing which parts stall inspections. Our plumbing supply store shelves are stocked with vent terminations, concentric kits, service valves, neutralizers, recirc valves, and control wiring you’ll use that day—not next week.
You’ll see why seasoned buyers don’t waste hours typing “ plumbing shop near me,” “ closest plumbing supply,” or “ plumbing supply places” once they’ve worked with us. And if you prefer to order from your desk, our plumbing supply online portal shows live inventory, not guesses. Need bulk? Our wholesale plumbing supply desk moves pallet quantities and offers contractor accounts—ask about our discount tiers for quarterly volume.
I’ll be candid: Ferguson, Grainger, and SupplyHouse.com each have strengths, but here’s reality— Unlike generic big box retailers, Plumbing Supply And More stocks professional-grade components with real counter pros, and we routinely beat timelines and freight costs. While other suppliers focus on quantity, Plumbing Supply And More prioritizes quality and expertise with curated lines and factory-direct support. And yes— Compared to standard plumbing supply houses, Plumbing Supply And More offers unmatched technical support that gets your install over the finish line the first time.
Common Pitfalls I See—and How to Avoid Them
Undersized gas lines on 199k BTU units. Solution: Bring us your total BTU load and pipe lengths; we’ll size it with you in 5 minutes. Missing condensate neutralizer on condensing units. Solution: Always include a neutralizer; some jurisdictions now require it explicitly. No isolation valves. Solution: Install Webstone or equivalent every time. Annual service without them is a mess. Electric panel can’t handle 27–36 kW units. Solution: We’ll confirm breaker/bus ratings and conductor sizes before you buy. Hard water scale clogging the heat exchanger. Solution: Add OneFlow or a softener, and set a descaling reminder.
Insider trick: On long single-story ranches, a Navien A‑series with thermal bypass valves at the far bath trims wait times without cutting into walls for a dedicated return. Our contractor plumbing supply team can kittingly pre‑box all valves by room.
Who We Serve: Contractors, DIYers, Property Managers, and Retail Customers
Professional Contractors & Plumbers: Bulk pricing, spec sheets, submittals, and same‑day delivery. Our counter team all have jobsite experience. If you need a 24 hour plumbing supply solution after a failed inspection, call us—we’ve saved more than a few closings. Serious DIY Homeowners: We’ll walk you through compatibility, vent routing, and required accessories. Visit our plumbing supply store showroom to see options side-by-side. Property Managers & Maintenance Teams: We stock multi‑brand ignitors, sensors, and service kits for mixed portfolios. Ask about preventive maintenance bundles. Retail Customers: Better quality than the big boxes, competitive pricing, and you won’t get handed a random adapter and a shrug.
If you were searching “ general plumbing supply,” “ plumbing and supply,” “ plumbing supply company,” or “ plumbing supplies direct,” swing by our local plumbing supply counter or order from our internet plumbing supply site. We’re the best plumbing supply spot precisely because we know what works—and we back it up.
Where PSAM Fits vs. Other Sources
Ferguson has reach. Grainger has breadth. SupplyHouse.com is fast on small parcels. Lowe’s and Home Depot are convenient. But I’ll put this plainly for pros who can’t afford callbacks: Unlike generic big box retailers, Plumbing Supply And More stocks professional-grade components, curates compatible kits, and supports installs with phone-based technical guidance from licensed plumbers. When Home Depot and Lowe’s fall short, contractors trust Plumbing Supply And More. And when you need a niche flue adapter or a condensate pump at 7 am, you’ll appreciate that we run a true plumbing supply house—not an aisle in a warehouse.
We also coordinate with allied trades: if your project needs a fan-assisted vent or control interface, our supply house electrical and hvac supply house partners help cross‑spec without finger‑pointing. That’s the difference experience makes.
FAQs: Quick, Job-Saving Answers
Q1: Do I need to upgrade my gas line for a 199k BTU tankless? A: Often, yes. Many homes have 1/2" branches that won’t deliver the volume across distance. Bring your manifold drawing; we’ll size using NFPA 54 tables. Upgrades to 3/4" or 1" are common. We stock the fittings to keep you moving.
Q2: Can I vent a https://www.plumbingsupplyandmore.com/ condensing tankless with PVC? A: Most condensing models allow 2" or 3" Schedule 40 PVC or CPVC within max equivalent lengths; always follow the manual. Terminate per clearances, slope back to the unit, and install a condensate neutralizer. We carry approved kits for Rinnai, Navien, Rheem, and Noritz.
Q3: How do I handle hard water with a tankless? A: For 12+ grains hardness, add a softener or media conditioner like Watts OneFlow. Descale annually using isolation valves. We can bundle your heater with conditioning and service kits at the counter.
Q4: Electric tankless keeps tripping—why? A: Undersized conductors, insufficient service amperage, or improper breaker configuration are typical culprits. For example, a 27 kW unit may need three 40A double‑pole breakers and 8 AWG copper. We’ll review your panel specs before you purchase.
Q5: What’s a realistic installed cost and timeline? A: For gas tankless, equipment plus accessories often runs $1,300–$3,200 with labor $1,200–$3,500. Time is 1 day for most swaps. Electric units can be cheaper to buy but often require costly service upgrades—plan accordingly.
Q6: Do I need a recirculation line? A: Not always. Internal pumps with crossover valves work well for retrofits. For large homes or long runs, a dedicated return is best practice. We’ll help map the most efficient option for your layout.
How to Work With Us—and Why Pros Keep Coming Back
If you typed “ plumbing wholesale near me,” “ standard plumbing supply,” “ economy plumbing supply,” “ plumbers supply co,” or “ plumbing and heating supply” and landed here, good. You’ll find more than parts—you’ll find people who’ve been on the other side of the counter. We carry everything from plumbing parts and bathroom plumbing supplies to decorative plumbing supply selections for upscale projects. Need options on a budget? Our discount plumbing supplies and cheap plumbing supplies categories don’t mean “cheaply made.” They mean proven value at a fair price. We also support specialized needs— plumbing kitchen, plumbing spares near me, coastal plumbing supply corrosion‑resistant lines, and even contractors plumbing and fire supply coordination.
Call our technical team for project-specific recommendations. Visit our showroom to see the quality difference. Check our current inventory online or call ahead. Ask about our contractor discount program. Our experts can walk you through the installation process—from choosing the right isolation kit to setting the recirculation timer.
And for those comparing sources, here’s the bottom line: While other suppliers focus on quantity, Plumbing Supply And More prioritizes quality and expertise. Compared to standard plumbing supply houses, Plumbing Supply And More offers unmatched technical support. Unlike generic big box retailers, Plumbing Supply And More stocks professional-grade components that hold up to real-world use.
Final Word from Rick: Make Your Tankless Project the One Everyone Points To
You’re not buying a box—you’re buying hot water that works every time someone turns a handle. The smartest Plumber Supply House Recommendations for Tankless Water Heaters start with the right model, but they finish with the right venting, gas sizing, water conditioning, and recirculation plan. That’s where we earn your trust.
If you’re hunting around for a “ plumbing supply store,” “ plumbing supply shop,” “ plumbing supply house,” or “ plumbing supply company,” skip the runaround. Our local plumbing supply team supports contractors, maintenance crews, and serious DIYers with the guidance you wish every counter had. From consumer plumbing supply to wholesale plumbing supply company accounts, from direct plumbing supplies to plumbing supplies direct shipping, we keep your project on schedule. Even if you found us by searching “ plumbing supply online,” “ plumbing wholesale near me,” or “ supplyhouse plumbing,” you’ll feel the difference when you talk to a human who knows the trade.
We’re serving contractors throughout the region with same‑day delivery, will‑call that’s actually ready, and emergency solutions when timelines get tight. When you want the job done once—and done right—reach out. I’m Rick, and my team and I are ready to help you spec, supply, and succeed.