holding tank for under the porta potty

Holding Tank for Portable Toilets


At Johnny on the Spot, we’ve got what you need for those times when you have to do business off the grid. Crafted for maximum durability, these tanks ensure your waste is stored safely and discreetly. These toilet holding tanks are a necessity at long term construction sites or RV resting sites where in-ground septic is not available. This holding tank for portable toilets holds 250 gallons and can be emptied as needed. Just let us know when you’re ready to have them pumped, and we will take care of the rest.

These units are functional and low profile. They are manufactured with extremely durable plastic, featuring heavy-duty, thick-wall construction. The tank’s color reveals the level of liquid, so it’s easy to identify when it’s time to have the unit pumped. This is the perfect holding tank for portable toilets.

With our holding tank service, you’ll have everything you need for your portable toilet needs. Give us a call today for a free estimate.


  • Heavy-duty, thick-wall construction
  • Natural color of the unit reveals fluid levels
  • Discrete appearance
  • Works with a variety of plumbing configurations


  • Height: 18”
  • Width: 48”
  • Length: 72”