For the most home-like portable toilet, choose the Thetford Porta Potti 565E with a battery electric flush and a 17.44-inch seat; for no batteries, the piston-flush 365; for tight spaces, the compact 345. Thetford says its waste tanks need emptying after about 27 to 33 flushes.
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This guide covers portable flushing toilets with detachable waste tanks.
Portable toilets compared
| Toilet | Flush | Waste / fresh tank | Seat height |
|---|---|---|---|
| Thetford Porta Potti 565E | Battery electric | 5.5 gal / 4 gal | 17.44 in. |
| Thetford Porta Potti 365 | Piston pump | 5.5 gal / 4 gal | 16.06 in. |
| Thetford Porta Potti 345 | Piston pump | 3.2 gal / 4 gal | 12.75 in. |
| Camco 41541 | Bellows (listing) | 5.3 gal (listing) | See listing |
A portable flushing toilet has two tanks: a fresh water tank on top for flushing and a sealed waste tank below that you detach and carry to a toilet or dump station to empty. They are used in camping, vans, boats, cabins without plumbing, and sometimes in homes during a remodel or for someone with limited mobility. Thetford, maker of the Porta Potti line, says no electricity is required: units flush with batteries or a manual pump.
Thetford Porta Potti 565E: electric flush, tallest seat
Choose the Thetford Porta Potti 565E for the most home-like feel. Thetford lists (thetford.com) a battery-powered electric flush, a large bowl and comfortable seat height, level indicators for both fresh and waste tanks, a carrying handle, a lid latch for travel, an integrated toilet paper holder and hidden controls, with a 5.5-gallon waste tank, a 4-gallon fresh tank, a 17.44-inch seat height and outside dimensions of 17.63 by 15.07 by 17.71 inches.
On October 15, 2026, the standard new offer from a third-party seller showed stock with Thetford part 92306.
Check Thetford Porta Potti 565E electric portable toilet on Amazon →
Thetford Porta Potti 365: piston flush, full size
Choose the Thetford Porta Potti 365 if you want a full-size tank without batteries. Thetford lists (thetford.com) an easy-to-use piston pump flush, a waste tank level indicator, a carrying handle, a lid latch, a sealed valve to keep odors in the holding tank, and a removable seat and cover, with a 5.5-gallon waste tank, a 4-gallon fresh tank and a 16.06-inch seat height.
On October 15, 2026, the standard new offer from a third-party seller showed stock with model 365.
Check Thetford Porta Potti 365 portable toilet on Amazon →
Thetford Porta Potti 345: compact
Choose the Thetford Porta Potti 345 where space is tight, such as a van or small boat. Thetford lists (thetford.com) a piston pump flush, a waste tank with a rotating pour-out spout, a waste level indicator, a carrying handle, a lid latch, a sealed valve and a removable seat, with a 3.2-gallon waste tank, a 4-gallon fresh tank and a 12.75-inch seat height. The low seat saves space but is harder to get up from.
On October 15, 2026, the standard new offer sold by Amazon.com showed stock with part 92814.
Check Thetford Porta Potti 345 compact portable toilet on Amazon →
Camco 41541: a budget option
Choose the Camco 41541 for a lower-cost portable toilet. The listing describes a 5.3-gallon detachable waste tank, a sealing slide valve and a bellows-type flush in gray. Camco’s current website does not publish a spec page for it, so we describe it from the listing.
On October 15, 2026, the standard new offer sold by Amazon.com showed stock with model 41541.
Check Camco 41541 portable toilet on Amazon →
How many flushes before emptying?
Thetford’s support pages give averages: the fresh water indicator covers about 56 flushes, and the waste indicator shows when to empty after about 27 to 33 flushes depending on the model. A larger waste tank means fewer trips to empty but a heavier tank to carry: 5.5 gallons of waste is heavy, so make sure whoever empties it can lift and carry it safely.
Thetford also notes the waste tank will not freeze unless the temperature drops below 0°F, according to its FAQ (thetford.com).
Electric, piston or bellows flush?
An electric flush like the 565E uses batteries and a button, which is easiest for anyone with weak hands. A piston pump, like the 365 and 345, is pushed by hand and needs no batteries. A bellows flush, as described for the Camco, is pumped by pressing a bellows. Thetford recommends removing batteries during storage or long periods of non-use.
Seat height and stability
Seat height matters more than most buyers expect. Thetford lists 17.44 inches for the 565E, close to a home comfort-height toilet, 16.06 inches for the 365 and 12.75 inches for the compact 345. For older adults or anyone who has trouble standing up, choose a taller unit, place it on a flat floor, and consider a grab bar or support nearby.
Using a portable toilet at home
Portable toilets are not only for camping. They can fill in during a bathroom remodel, in a basement or garage workshop with no bathroom, or at a cabin before the plumbing is finished. In a home, place the toilet on a flat, easy-to-clean floor, keep it near a regular toilet for emptying, and keep the fresh tank topped up so flushes clear the bowl. A taller unit like the 565E is easier to use for adults who are used to a standard toilet.
Storage and travel
Thetford lists a lid latch on these models to keep the toilet closed while it moves. Empty and rinse the waste tank before storing the toilet, follow the storage steps in Thetford’s owner’s manual, and remove batteries from electric models as Thetford recommends. Amazon lists a Thetford carrying bag (299901) that fits the 365 and 565E, which keeps the unit clean in a vehicle or closet.
Emptying and cleaning
Empty the waste tank into a toilet or an RV dump station, never on the ground. Thetford lists a rotating pour-out spout on the 345; rotate the spout toward the bowl, open the vent if your model has one, and pour slowly. Rinse the tank with clean water before refilling. Thetford recommends using toilet seal lubricant and conditioner regularly to keep the seals working, and many owners add a tank treatment made for portable toilets to control odor.
Portable, composting or RV toilet?
A portable toilet is the simplest option for occasional use. For a cabin or tiny home used often, a composting toilet avoids carrying liquid waste; see our composting toilet guide. For a permanent RV toilet that flushes into a black tank, see our RV toilet guide. For more RV plumbing, our RV shower head and RV bathroom faucet guides cover the rest of the bathroom.
Frequently asked questions
How many flushes does a portable toilet hold?
Thetford says its fresh water indicator covers about 56 flushes and its waste indicator signals emptying after about 27 to 33 flushes, depending on the model.
Does a portable toilet need electricity?
No. Thetford says Porta Potti toilets run on batteries or manual pumps such as pistons or bellows.
Will a portable toilet freeze?
Thetford says the waste tank will not freeze unless the temperature drops below 0°F.
Which portable toilet has the tallest seat?
Of the Thetford models here, the 565E lists the tallest seat at 17.44 inches.
Where do you empty a portable toilet?
Into a regular toilet or an RV dump station.
How we chose
This document-based guide makes no hands-on testing claim. We read Thetford’s support pages for the Porta Potti 565E, 365 and 345; the Camco is described from its listing. On October 15, 2026, the 345 and Camco offers were sold by Amazon.com and the 565E and 365 offers came from third-party sellers; all showed stock. Read our selection method and about Plumbing Picks.
Primary sources
- Thetford Porta Potti 565E (thetford.com): electric flush, tanks, seat height, dimensions, features, FAQ.
- Thetford Porta Potti 365 (thetford.com): piston flush, tanks, seat height, sealed valve.
- Thetford Porta Potti 345 (thetford.com): piston flush, 3.2 gal waste, 12.75 in. seat, pour-out spout.