Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: does it work where there is no dedicated return??
Document: This unit has a flow rate knob on the side that can control how fast or slow you want the water to flow in your recirc line. I set mine at the halfway point on the dial and that works well for me. This pump is very quiet in operation and appears to be built just as solidly as the old Laing pump it replaced. The model name on the product label is Ecocirc and the product literature says it is made for systems with dedicated hot water return lines.
The longest run from the water heater is 300 feet to my MBR shower, so a recirc pump is a must have for me.If you've run your system for as many years as we have, I highly recommend replacing the housing - ours was full of corrosion and deposits. I also replaced the check/swing valve which is between the pump and the return to the hot water heater - it was corroded and nearly completely clogged.
uses minimal electricity (~30w) and recirculates my 40'+ of 1&#34; main hot water supply line within minutes at 1/2 speed and this unit only has 1/2&#34; connections. Great build quality and I have to put my ear to it to hear it. built in speed controller is a plus.
We like the size and operation of this pump.When using this pump as a re-circ pump for hot water it holds up fine if you can catch the crud in a pre filter that is in the water supply.
Was a perfect replacement for the previous generation. I didn't have to do anything but unscrew the old one and screw in the new one. It fit right into the old housing without a hitch. I love it when things are easy and the manufacturer thinks of the consumer.
Very sturdy, virtually silent, trouble free.
Two Laing pumps have failed for me in the last 10 years. The motor failed on my first Laing. On the second model sm 303btw the rotor impeller assembly needed  a replacement part which is obsolete. So this pump is junk! I will not buy another.
This pump's fittings allowed for a very easy replacement of the older model. The directions said nothing about the flow adjustment, so I called Laing and found out the max setting is the same as the normal/fixed setting of my older model--so that's where I set my new pump (max).
This pump is a little noisier than the 7 years old pump it replaced.
The pump arrived quickly and we had it installed the same day. Works like a charm. No more waiting for the hot water.
Answer: yes