Best Mid-Size Water Storage Tanks Ranked

8 water tanks and container kits from 25 to 49 gallons.

Last updated: November 9, 2026

From 25 to 49 gallons is a few weeks of drinking water for one or two people. It mixes WaterPrepared’s 35-gallon tank with its spigot, RomoTech and Norwesco poly tanks, and larger kits of 5- and 7-gallon containers.

Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.

Full ranking 8

  1. WaterPrepared 35 Gallon Utility Tank
    #1 of 83.6Full review

    For a portable 35-gallon drinking-water tank that rides in a truck bed or trailer.

    Amazon $157.99
    $157.99
    35 gal$4.51Included
  2. Reliance Aqua-Tainer 7 Gallon, 4-Pack
    #2 of 83.3Full review

    For camping and small emergency stashes in a proven rigid 7-gallon jug.

    Amazon $149.99
    $149.99
    28 gal$5.36Included
  3. RomoTech Domed Tank 30 Gal (Black)
    #3 of 83.2Full review

    For a 30-gallon opaque square tank with a 5 in. fill lid and an NSF-certified resin.

    Amazon $206.50
    $206.50
    30 gal$6.880.8 in. outlet
  4. RomoTech Domed Tank 26 Gal (Black)
    #4 of 83.1Full review

    For a 26-gallon opaque tank that fits under a bench or in a truck bed.

    Amazon $189.99
    $189.99
    26 gal$7.310.8 in. outlet
  5. Legacy 5-Gallon Stackable Water Tanks, 6-Pack
    #5 of 82.9Full review

    For a first emergency-water stash of small, stackable tanks that one person can carry.

    Amazon $184.99
    $184.99
    30 gal$6.17Included
  6. Saratoga Farms 5-Gallon Stackable Containers, 40 Gallons
    #6 of 82.7Full review

    For 40 gallons of portable emergency water in standard 5-gallon containers.

    Amazon $228.95
    $228.95
    40 gal$5.72None
  7. Norwesco 45 Gallon Flat Bottom Utility Tank
    #7 of 82.1Full review

    For a 45-gallon flat-bottom utility tank with a 1 in. drain, at a fair price per gallon.

    Amazon $289.99
    $289.99
    45 gal$6.441 in. outlet
  8. Norwesco 25 Gallon Flat Bottom Utility Tank
    #8 of 82.0Full review

    For a low rectangular 25-gallon tank with a drain, under a bench or in a truck bed.

    Amazon $199.99
    $199.99
    25 gal$80.8 in. outlet