“Rob's work is top notch. I'm a picky engineer. His choice of equipment, materials and his workmanship was excellent. In the bidding process, Rob was responsive, honest, competent, creative, and respectful.”
Water heaters —
tank, tankless, heat pump.
No hot water? Plan a tankless upgrade? We install all three, file the rebate, and leave the install diagrammed and labeled for the next tech.
- Master Plumber on every install
- Rinnai, Navien, Bradford White
- Mass Save rebates handled
Review on GoogleNicholas U.
“Absolutely the best in the business — hands down.”
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Reviews on Google5.028+ reviewsDon't take our word for it. Take theirs.
From neighbors across Lakeville, Plymouth, Newton, Needham, Wellesley and beyond.
“He answered his phone at 6:30am. Within 15 minutes, Rob called and told me how to repair it myself — he did not take advantage of the situation. Saved me real money.”
“Rob was very professional and did an excellent job. Far surpassed my expectations. Will use him again in the future.”
“I recommend Rob with my highest level of support! Rob has installed multiple systems for me over the years.”
“His professionalism and craftsmanship went above and beyond what we expected. Highly recommend!”
“Great about keeping me in the loop. Very polite & respectful. Rob cleaned up on his way out — even brought his own vacuum.”
“Professional, very neat and orderly. Came when he said he would and did a great job.”
“Competitive Plumbing and HVAC was very responsive. I consulted with them and they did exactly what I wanted.”
Read more reviews on GoogleFree, no-obligation quote
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Tell us what you need. We'll get back to you fast — usually the same day — with honest pricing and next steps.
- Licensed & insuredMA Master Plumber #MP17629
- Open 24 hoursSomeone always answers
- 5.0 on GoogleHomeowners across SE Mass
- Free estimatesNo-obligation quotes
Same-day callback
Get a quote on water heater installation
30 seconds. We call you back the same day.
What we install
Right unit, right size, right vent.
Water heaters look simple. Most installs we walk into were done wrong — wrong vent, wrong gas line size, no expansion tank, no pan. We do them properly.
Tank water heaters (gas & electric)
Bradford White, Rheem, A.O. Smith — 40, 50, 75, 80 gallon. Same-day swap in most cases.
Tankless water heaters
Rinnai and Navien condensing tankless. Endless hot water and significantly lower running cost. Gas line and vent sizing handled correctly — most weren't on the install we're replacing.
Heat-pump water heaters
Rheem ProTerra and AO Smith Voltex hybrid units. Mass Save rebates available. Significantly lower electric bill than a standard electric tank.
Indirect water heaters
Pair with your boiler for unlimited hot water at very low marginal cost. The under-rated workhorse of efficient homes.
How it works
From phone call to walkthrough — done right.
1. Site visit & quote
We check existing fuel, vent, gas-line size, electrical, and recovery needs. Written quote with rebate already factored in.
2. Same-day swap on tank units
Most tank-to-tank swaps are 2–4 hours. New unit, expansion tank, drain pan, dielectric unions, properly torqued connections.
3. Tankless install (1 day)
Vent, gas line upsize if needed, condensate handling, isolation valves, temp set. We commission with combustion analyzer.
4. Walkthrough + rebate
Set the temp, walk you through the unit, file the Mass Save rebate paperwork. You should never see the inside of the panel.
Why Competitive
We don't promise quality. We deliver it.
We size it for your house, not the catalog
Manual J load calc on every install — most contractors skip it. Wrong size = short cycling, comfort issues, and a lot of wasted fuel.
Mass Save rebates handled for you
We're a registered Mass Save partner. Generous rebates on qualifying heat pumps and high-efficiency boilers — we file the paperwork.
Master Plumber on every install
Licensed Master Plumber (MA #MP17629) on every install — not a sales rep, not a sub.
Clean, labeled, serviceable
Our installs are diagrammed, labeled, and tidy. The next tech who walks in (even if it's not us) can service the system without guessing.
FAQ
Common questions about water heater installation.
How long does a water heater last?
Tank: 8–12 years average, 15+ if on a softener. Tankless: 18–22 years with annual descaling. If yours is past 10 and you see rust at the connections, plan ahead.
Tank or tankless?
Tankless wins on running cost and never running out, but the upfront is higher and gas/vent often need upsizing. Tank is cheaper today, simpler, and fine for many homes. We give honest math, not pitch.
Is a heat-pump water heater worth it?
If you have an electric tank now, almost always — significantly less electricity used, plus Mass Save rebate. Needs ~750 cubic feet of space (basement is fine), so not for tight closets.
Can you install in an emergency (no hot water)?
Yes. We stock common tank sizes and can usually swap same-day. Call (508) 944-7623.
More plumbing services
Other plumbing work we handle.
Towns we cover
Based in Lakeville. We serve it all.
Every red dot is a job we've completed. We're rooted in Lakeville and travel across Southeastern Massachusetts — don't see your town? Call us, we probably cover it.
Around Lakeville
- Lakeville, MAHQ
- Middleborough, MA
- Freetown, MA
South Shore
- Hingham, MA
- Cohasset, MA
- Scituate, MA
- Norwell, MA
- Hanover, MA
- Marshfield, MA
- Pembroke, MA
- Duxbury, MA
- Kingston, MA
- Plymouth, MA
- Halifax, MA
Greater Taunton & Attleboro
- Raynham, MA
- Berkley, MA
- Dighton, MA
- Easton, MA
- Norton, MA
- North Attleborough, MA
The SouthCoast
- Somerset, MA
- Swansea, MA
- Westport, MA
- Dartmouth, MA
- Acushnet, MA
- Fairhaven, MA
- Mattapoisett, MA
- Marion, MA
- Rochester, MA
Wareham & the Upper Cape
- Wareham, MA
- Bourne, MA
- Sandwich, MA
- Falmouth, MA
- Mashpee, MA
Greater Boston
- Boston, MA
- Newton, MA
- Needham, MA
- Wellesley, MA
- Headquarters
- Service area
- Past job
One call covers it — fast, local, licensed.
38+ towns across Southeastern Massachusetts and Greater Boston — same-day when you need it.
- Licensed & insuredMA Master Plumber #MP17629
- Open 24 hoursSomeone always answers
- 5.0 on GoogleHomeowners across SE Mass
- Free estimatesNo-obligation quotes
Open right now
(508) 944-7623Ready to get it done right?
Call us. We answer 24/7 — and we'll tell you straight up what it takes to fix it.