Wow this works great. I do not have a black tank rinse on my rv and this makes the dirty job much better. Being clear and having the two way water jet valve is the only way to make sure your san tank and hoses are clean. I got one of those self coiling garden hoses (it gets small) from walmart to use with this,
and I store them both in a ammo box I attached to the frame close to the black water dump valve. This keeps all the dirty stuff separate and neat.

It doesn't leak like the Valterra version, but it has a much smaller incoming water hole and is very slow to back-fill the tanks compared.

I use an Orbit Water Flow Meter Orbit Water Flow Meter sold here at Amazon along with this to know how much I'm putting into the tanks.
If you buy the Orbit Water Flow Meter, be sure to pick up some Filter Hose Washer W/Screen Filter Hose Washer W/Screen to make sure nothing stops the flow meter from spinning.

As for this, I'd rather have it be slow and not leak - at least people no longer ask why water is leaking on the ground near my sewer (like what happened every time I used the other one before I returned it).

It seems to be built well and fits nicely with no leaks. The water jet is a nice feature but it doesn't hit the black tank with enough pressure to really back flush it good, in my opinion. When you flip it to rinse the sewer hose that works adequately. For that reason I gave it three stars

This is a really poor design. Mine came with the rotating valve stuck, making the flush feature useless. I returned the defective one and went with another brand. As other reviewers have pointed out, the hole for water to flush with is really small, it would have taken a long time to fill the tank if the valve wasn't defective on the one I ordered.

Product was great for seeing what is coming out of my trailer. Tells me when the black tank has been flushed. I also was able to use the flush valve to further clean my sewer hose and tanks.