Contractor Cost Guide · Plumbing
Water Heater Installation Cost: 2026 Pricing Breakdown
What tanks, tankless units and the swap hardware list for at suppliers that publish prices. Tankless water heater installation cost gets its own section.
Pricing the whole job? Estimate it from a photo in about 6 seconds.
What drives water heater installation cost
Four things move the number. Fuel, capacity, whether the vent and gas line already fit, and whether the code official wants an expansion tank.
The unit is the biggest line. Every price below was read September 14, 2026.
SimplyWise Cost Estimator turns a photo of the closet into an itemized estimate in about 6 seconds.
Tank prices by fuel and capacity
| Named unit | Fuel and size | Published price |
|---|---|---|
| Reliance 6 30 EORT | Electric, 30 gal | $449.99 at McCoy’s |
| Reliance 6 40 EORS | Electric, 40 gal | $459.99 at McCoy’s |
| Reliance 6 50 EORT | Electric, 50 gal | $559.99 at McCoy’s |
| Richmond Essential 6G40-36F3 | Natural gas, 40 gal | $519.00 at Sutherlands |
| Richmond Essential 6G40-36F3 | Natural gas, 40 gal | $552.71 at McCoy’s |
| Richmond Essential 6G50-38F3 | Natural gas, 50 gal | $599.00 at Sutherlands |
Rows four and five are one model number at two suppliers. The gap is $33.71, about 6.5 percent.
The electric rows rest on one publisher. The other supplier stocks electric tanks but publishes no price on them, so we label that ladder single source.
Tankless water heater installation cost
Tankless changes the unit line and the venting. Here is what listings show.
| Named unit | Type | Published price |
|---|---|---|
| Reliance Premium Condensing 160,000 BTU | Gas, whole house, 0.4 to 10.5 GPM | $1,599.00 at McCoy’s |
| Reliance R4LX-280E | Electric, 28,000 W | $795.00 at McCoy’s |
| Richmond Essential RMTEX-11, 2.68 max GPM | Electric, point of use | $269.00 at Sutherlands |
| Richmond Essential RMTEX-04T, 0.9 max GPM | Electric, point of use | $199.00 at Sutherlands |
Read the flow rating before the price. A 0.9 GPM unit at $199.00 feeds one sink.
The gas condensing unit at $1,599.00 is about three times the 40 gallon gas tank at the same supplier. A swap usually brings new venting and a bigger gas line.
What we will not price
No supplier here publishes an installed price, and no maker warrants a labor figure. The whole house tankless rows also rest on one publisher.
Price the job from a photo
SimplyWise Cost Estimator turns a photo into an itemized estimate in about 6 seconds, with material and labor lines. Pricing is $29.99/mo or $239.99/yr, about $20/mo on annual, with a 7-day free trial.
The swap hardware nobody quotes
| Named item | Published price |
|---|---|
| Eastman thermal expansion tank, 2.1 gallon | $39.99 at Sutherlands |
| Eastman expansion tank, 4.5 gallon | $64.99 at Sutherlands |
| Camco 3/4 in temperature and pressure relief valve | $32.99 at Sutherlands |
| SharkBite 3/4 in push connector with ball valve | $37.99 at Sutherlands |
Two connectors, one relief valve and one expansion tank is $148.96. Bid it as its own line.
Every hardware price here is one supplier’s counter price, read the same day. Price yours at your own counter.
Customers who only hear the tank price call that padding. Itemize it and they sign it.
What the labor side pays
The occupation is Plumbers, Pipefitters, and Steamfitters. The May 2025 table counts 465,840 of them.
The hourly median is $30.67, the mean $34.70. The spread runs $24.13 at the 25th percentile, $40.92 at the 75th, $52.13 at the 90th.
Those are employee wages. The federal survey skips the self employed, so none is a billed rate.
A worked example, priced off stated inputs
A straight swap of a 40 gallon gas tank. Vent and gas line already fit.
| Line | Math | Amount |
|---|---|---|
| Heater, 40 gal gas | published range | $519.00 to $552.71 |
| Expansion tank, 2.1 gal | 1 at $39.99 | $39.99 |
| Relief valve | 1 at $32.99 | $32.99 |
| Flex connectors | 2 at $37.99 | $75.98 |
| Material subtotal | added | $667.96 to $701.67 |
| Wage content, 3 hours | 3 at $40.92, the 75th percentile | $122.76 |
A worked illustration off stated inputs, not a quote. The wage row is wage content only, before burden, truck and margin.
Price a heater swap in four steps
-
Confirm fuel and capacity first
Gas and electric price differently at every size.
-
Pull the unit price at your own counter
One model number listed $33.71 apart at two suppliers in a day.
-
Line out the swap hardware
Expansion tank, relief valve and two connectors. On stated parts, $148.96.
-
Price labor off your rate, not the wage table
Federal figures are employee wages. Carry burden, truck and margin on top.
Sources
Tank prices read live
- Sutherlands, Richmond Essential 40 gallon natural gas tall tank (model 6G40-36F3, $519.00; 2026-09-14).
- McCoy’s, Richmond Essential Series 6G40-36F3 gas water heater ($552.71; 2026-09-14).
- Sutherlands, Richmond Essential 50 gallon natural gas tall tank (model 6G50-38F3, $599.00; 2026-09-14).
- McCoy’s, Reliance 6 30 EORT electric water heater ($449.99; 2026-09-14).
- McCoy’s, Reliance 6 40 EORS electric water heater ($459.99; 2026-09-14).
- McCoy’s, Reliance 6 50 EORT electric water heater ($559.99; 2026-09-14).
Tankless prices read live
- McCoy’s, Reliance Premium Condensing 160,000 BTU tankless water heater ($1,599.00; 2026-09-14).
- McCoy’s, Reliance R4LX-280E electric tankless water heater ($795.00; 2026-09-14).
- Sutherlands, Richmond Essential RMTEX-11 point of use tankless (2.68 max GPM, $269.00; 2026-09-14).
- Sutherlands, Richmond Essential RMTEX-04T point of use tankless (0.9 max GPM, $199.00; 2026-09-14).
Swap hardware
- Sutherlands, Eastman thermal expansion tank 2.1 gallon (DET-5, $39.99; 2026-09-14).
- Sutherlands, Eastman expansion tank 4.5 gallon (DET-12, $64.99; 2026-09-14).
- Sutherlands, Camco 3/4 in temperature and pressure relief valve ($32.99; 2026-09-14).
- Sutherlands, SharkBite 3/4 in push connector with ball valve ($37.99; 2026-09-14).
Wages and product
- BLS OEWS, occupation 47-2152, May 2025 national (median $30.67 on series OEUN000000000000047215208; captured 2026-09-11).
- SimplyWise Cost Estimator, App Store (4.8 rating; verified 2026-09-09).
Common questions about water heater installation cost
Tanks and hardware
How much does a water heater cost in 2026?
Published tank prices on September 14, 2026 ran $449.99 for a 30 gallon electric at one supplier to $599.00 for a 50 gallon gas unit at another.
Why do two suppliers list different prices for the same heater?
Each sets its own counter price. One model number, the Richmond Essential 6G40-36F3, listed at $519.00 and $552.71 on the same day.
What hardware does a heater swap need?
An expansion tank, a temperature and pressure relief valve, and two flex connectors. On stated parts, $148.96.
Tankless and labor
What is tankless water heater installation cost compared to a tank?
A gas condensing whole house unit listed at $1,599.00, about three times the $552.71 gas tank at the same supplier. A swap usually brings new venting and a bigger gas line.
Can SimplyWise price a heater swap from a photo?
Yes. SimplyWise Cost Estimator turns a photo into an itemized estimate in about 6 seconds, with material and labor lines. Free to try, at $29.99/mo.
Turn the swap list into a signed job.
Snap a photo and get an itemized estimate in about 6 seconds. Free to try.