Granby 275 Gallon Horizontal Oil Tank (204701)
Granby Industries makes steel residential heating-oil tanks in the US and Canada, sold under its own name. Its 275 and 330 gallon UL-80 tanks are the obround (flat-sided oval) shape found in most basements, made for either standing upright (vertical) or lying on their side (horizontal).
| Model | Standard Residential Oil Storage Tank UL-80 (275 US gal, Horizontal, 12 gauge) |
| Part / model number | 204701 / 204701G |
| Rated capacity | 275 US gal |
| H (height) | 27 in |
| W (width) | 44 in |
| L (length) | 60 in |
| Empty weight | 250 lbs |
| Inside or outside? | not stated (outside/inside not specified) |
“204701 / 204701G 275 Horizontal 12 27″ 44″ 60″ 250 (columns: PRODUCT # CAPACITY MODEL GAUGE THICKNESS DIMENSIONS H W L WEIGHT lbs)” — Granby Industries, retrieved 2026-11-01
Dimension drawing
Gallons by the inch
Worked from Granby's printed H × W × L (27 × 44 × 60 in) as an obround shape, the tank holds 267.9 gal brim-full against its 275 gal rating.
| Depth | Gallons | Litres |
|---|---|---|
| 1″ | 6.2 | 23 |
| 2″ | 13.8 | 52 |
| 3″ | 22.3 | 84 |
| 4″ | 31.4 | 119 |
| 5″ | 41 | 155 |
| 6″ | 51.1 | 193 |
| 7″ | 61.5 | 233 |
| 8″ | 72.2 | 273 |
| 9″ | 83.1 | 315 |
| 10″ | 94.2 | 357 |
| 11″ | 105.5 | 399 |
| 12″ | 116.8 | 442 |
| 13″ | 128.3 | 485 |
| 14″ | 139.7 | 529 |
| 15″ | 151.1 | 572 |
| 16″ | 162.4 | 615 |
| 17″ | 173.7 | 657 |
| 18″ | 184.8 | 700 |
| 19″ | 195.7 | 741 |
| 20″ | 206.4 | 781 |
| 21″ | 216.8 | 821 |
| 22″ | 226.9 | 859 |
| 23″ | 236.5 | 895 |
| 24″ | 245.7 | 930 |
| 25″ | 254.1 | 962 |
| 26″ | 261.7 | 991 |
| 27″ | 267.9 | 1,014 |
What we found checking the maker's documents
- Granby's product page links a “Capacity Chart for US Horizontal Tanks”, but the file it opens is the chart for vertical tanks, and no horizontal chart is published. The chart here is computed from the printed dimensions; for the upright tank, Granby's own chart runs about 2 % above the same geometry, so expect real readings to be a little higher than this table.
Related: 275 gal oil tank chart · when will my oil run out? · all manufacturer tanks. Dimensions differ from your tank? Measure it and use the tank volume calculator.
Stick readings at quarter levels
The values use the obround geometry from Granby's printed 27 × 44 × 60 in (268 gal brim-full). Granby's own vertical chart reads about 2% above the same geometry, so real values can be a little higher.
| Level | Stick reading | US gallons |
|---|---|---|
| 1/4 tank | 7.5 in | 67 |
| 1/2 tank | 13.5 in | 134 |
| 3/4 tank | 19.5 in | 201 |
Full weight
Granby prints a tank weight of 250 lb. At a typical fill of 250 gal of heating oil at 7.2 lb/gal, the oil weighs 1,800 lb. The total is about 2,050 lb on the four legs.
How to stick this tank
- Remove the fill cap on the top of the tank.
- Put a clean wooden stick into the tank until it touches the bottom. Keep the stick vertical.
- Remove the stick and read the wet line in inches.
- Find the reading in the chart above. The tank is 27 in deep, so the chart stops at 27 in.
- Install the cap again.
Do not use a vertical-tank chart. At 12 in, a horizontal 275 holds about 117 gal, but a vertical 275 holds about 64 gal.
Cite this page
Copy a reference for this page. The data on this page comes from the maker's own documents. Also cite the document in the sources list.
Sri Murugan Systems. (2026, November 1). Granby 275 gallon horizontal oil tank (204701) chart. tankvolumecalc.com. https://tankvolumecalc.com/tanks/granby/275-gallon-horizontal-oil-tank-204701/
@misc{srimurugansystems2026granby275gallonhorizontaloiltank204701,
author = {{Sri Murugan Systems}},
title = {{Granby 275 Gallon Horizontal Oil Tank (204701) Chart}},
year = {2026},
month = nov,
howpublished = {\url{https://tankvolumecalc.com/tanks/granby/275-gallon-horizontal-oil-tank-204701/}},
url = {https://tankvolumecalc.com/tanks/granby/275-gallon-horizontal-oil-tank-204701/},
note = {tankvolumecalc.com, accessed 2026-11-01}
}Last updated 1 November 2026.
Sources and standards
- Standard Residential Oil Storage Tank UL-80 | Granby Industries (US site) — 'Available Models' tableGranby Industries — manufacturerhttps://www.granbyindustries.com/en-us/products/standard-residential-oil-storage-tank-ul-80/not shown on page
- Brochure Residential and Light Commercial Tanks (file 2606_GranbyInd_Brochure_ResidentialTanks_USA_WEB.pdf)Granby Industries — manufacturerhttps://www.granbyindustries.com/app/uploads/2026/05/2606_GranbyInd_Brochure_ResidentialTanks_USA_WEB.pdffilename prefix 2606; uploaded 2026/05 per URL path
- SI0062 GENERIC DRAWING FOR HORIZONTAL UL80 TANKSGranby Industries — manufacturerhttps://www.granbyindustries.com/app/uploads/2026/04/SI0062_D.W-GENERIC-DRAWING-FOR-HORIZONTAL-UL80-TANKS.pdf© 2024; 'FOR PUBLICATION'; revision letter in filename (SI0060_D / SI0062_D)
- Methodology — partial-fill formulas used for the geometric figurestankvolumecalc.comhttps://tankvolumecalc.com/methodology/
Every linked source above was retrieved and checked on 2026-11-01.