Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Can the water flow be controlled?
Document: I made a portable shower in my converted bus RV. It works great but after the 3rd use it will not work off the 12 volt outlet, just the D batteries. So I am hoping that it will not eat through batteries. Other then that it has a great water flow for its size.
This gadget is pretty cool. The pressure of course is not overwhelming but the water use is very efficient. If it had greater flow, you would run out of water pretty quickly. We used it to cool off at a tailgate and were very pleased. We had a 12-gallon tank which was plenty for 3 showers with a lot to spare.
If I had to run this on batteries I would rate it as 3  stars or &#34;It's OK&#34;. I added a 12v receptacle in my horse trailer and lifted the water source about 45 inches from the trailer floor and it worked much better. It will also work without power if the water container is high enough for gravity flow.
very low cost item, yet performs quiet well.... sure, ya gotta tweak a few leaks, easy with plumbers tape.... flow is just about perfect for a 6 gallon shower...any faster, and u would run out of water too fast... if you have extra water capacity to use at campsite, buy 2 of these. I run off a 110V to Car 12V adapter...
We recently went through the WV water poisoning. We ordered this product to take showers with CLEAN water. It works so well, has good pressure comparatively, and was so easy! Just heat water, add water and pump to a 5-gallon bucket (we raised bucket to sit on toilet for better flow), attach shower head with suction cups to shower door and...awesome shower!
This product is very dependable. It works better via a DC car or wall wart adapter than the batteries. With the batteries, the flow is lower, but still adequate.
It is just what I need for camping and will be handy if our water freezes up again we can fill a bucket and take a shower!
We use this at our seasonal home which does not have running water. It works great for showering and as a way to rinse the dishes!
Performed as advertised, dual power is great. Full shower with less than two gallons of water.
But, if it performs as promised, we will use it with a large RV type water container that is mounted on top of our Land Rover.
Answer: yes