Thermal Expansion Tank Prices
$38.08 – $154.72 per ea
Median $58.90
Based on prices as invoiced rather than a normalised per-unit price, so expect more variation than usual.
Thermal Expansion Tank prices by product
| Product | Typical range | Median |
|---|---|---|
| 2.1 GAL THERMAL EXPANSION TANK NSF APPROVED | $20.63 – $20.63 / ea | $20.63 |
| AMTROL: 15 EXPANTION TANK / EX-15 EXTROL | $44.96 – $44.96 / ea | $44.96 |
| EXP TNK THERM-X-TROL THRML 2 AMTST-5 | $64.53 – $64.53 / ea | $64.53 |
| Granite GPT60V Easy-Pro, 27.7 Gallon In-line Thermal Expansion Tanks | $396.92 – $396.92 / ea | $396.92 |
| 4.8 GAL THERMAL EXPANSION TANK NSF APPROVED | $43.35 – $43.35 / ea | $43.35 |
| Granite GPT21OV Easy-Pro, 79.3 Gallon In-line Thermal Expansion Tanks For Domestic Water | $1,017.50 – $1,017.50 / ea | $1,017.50 |
6 of 12 thermal expansion tank products have enough independent purchase data to price. The rest are in our data but below the threshold we publish at.
Checking a specific thermal expansion tank price
To check a specific purchase, find the matching product in the table above. If it isn't listed, we don't yet have enough independent purchases of that exact item to publish a figure we'd stand behind.
How we know this
These figures come from real invoices processed through CostCrunch, not list prices or survey data. Each line is normalised to a price per unit, the top and bottom 1% are excluded as outliers, and we publish what we have for the last 12 months and say how thin it is. Where a figure rests on very few purchases, a single supplier or a single company, that is noted alongside it — those are one buyer's experience rather than a market rate.
Check your own invoices against these prices — CostCrunch reads every line item and flags anything above market.