Purchased the 35 Gal. model for use while working a long 7 weekend event to avoid having to move my trailer each week to dump my tanks. The unit works really well but never seems to fully drain. For people complaining about them breaking while towing, if you read the instructions they are ment to only be towed across the camp site, no faster than 5 miles per hour. I have now moved my unit on uneven rocky ground 6 times and the only issue I have had was I forgot to clip the hose up and dragged it a few feet tearing it (my mistake, not the unit). Having fixed that I have no real complaints other than doesn't easily drain completely.

I purchased one of the 35 gallon models this summer while camping at one of our state parks here in Indiana. The park does not have full hookups and we were there for 5 days. In order to not have to break camp, I booked to Indy and picked it up and high tailed it back. For sake of prolonging the life of moving parts, I generally lubricate any thing that has gears, slides or rotates. It hooked right up to my trailer fittings with no adapters I made 2 trips to the dumping station with no problems. (approximately a half mile each way) I have only used it twice since then, still no issues. It does say in the instructions: Caution: "Towing faster than 5 mph (8 Km/h) can damage tank and/or wheels, and voids product warranty." Also "If any liquid remains in the tank, hold the handle and rock the tank up and down a few times." The only complaint that I have with this item is the hole in the end of the tounge will not fit over a 2 & 5/16 in. ball. How many travel trailers have a smaller hitch than that? (I would have given it 5 stars if not for this little faux pas). I use a small piece of clothes line rope to tie it to the hitch. In all, I'm satisfied and happy that I purchased it.

I purchased this item last year and put it away for the winter. I first used it last week. The hose seems to be blocked and the water overflowed into the road. I cannot seem to empty it. I wish I had not purchased it.

Purchased this unit to prevent us from having to break camp every time the system was full. Very impressed with the design and operation of the unit. Need to get fitting to go between camper and holding tank as it would not accept any of the fittings in my arsenal. The fill gage worked great and prevented overflow. Pulling by hand through the grass uphill was a bit of a chore, but doable. Problem came with towing. Within the first ¼ mile of the trip to the dump, the cheep plastic rear wheels melted off the axel. It’s ashamed that such a nice design would be topped off with such cheep wheels.

We bought this holding tank because we needed to be able to dump while we are repairing our damaged home. I wish we hadn't. Good pts: it does hold a lot of black water and it doesn't allow more than it can hold. Bad pts: It never completely empties (I don't care what the box says) , it was very expensive, hard to drag with lawn tractor (doesn't fit standard ball), requires special fitting that they don't tell you about and the underside wheel broke off completely after 2 pulls (back wheels came off first time used but could be put back)!! If there was a choice of zero stars, that's what I would have given it. Don't waste your money!!!