Question 1

Will this fit mansfield 139NS-181White?

Accepted Answer

Not sure,  my tank cover has an A160 plus other marking I can not read. However, I do have two phone numbers. The first is from the instruction sheet for the fill valve: (419)-938-5211.  The second phone no. is from a  Mansfield replacement flush valve: 1-877-850-3060. (Customer Service ). Hope this helps!

Question 2

Does this contain the full tube that goes to the refill cylinder?

Accepted Answer

Yes it does. Mine was a perfect replacement it a OEM part

Question 3

I installed this piece and now the toilet is very loud when filling. Any idea what caused that?

Accepted Answer

First off make sure you get the right part for your toilet brand and model. Look at the inside of your toilet tank cover and you can find the model number. Type the model number and it will show which fill valve is compatible. Since this is the original part that's fully compatible to my toilet brand and model, it fits like a glove, and easy installation and works very well ever since. 
I don’t know the answer to your question. so I looked it up from the internet and found a web page that may help you diagnose the problem. Here is link:
https://homeguides.sfgate.com/loud-whining-sound-toilet-tank-filling-back-up-33021.html
I hope this will help. If all fails, get a new fill valve and make sure it's compatible to your toilet brand and model, and install it according to directions. I searched the internet before installing mine. Type key words “replace toilet tank fill valve” and you can educate yourself quite a bit. But make sure to get the right fill valve for your toilet brand and model or else your effort will all be wasted. I learned the hard way.

Question 4

Is this easy to replace? Does it come with instructions? Looking for quick, easy repair but I've never replacedone toilet parts myself.

Accepted Answer

Easy to replace. No instructions in my pack. Watch the videos on line for help. Remember how you took it apart and do the reverse

ASIN	B002SR0C3I
Best Sellers Rank	#1,686,277 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,193 in Toilet Flush Valves
Brand Name	OCEMY
Customer Reviews	4.6 4.6 out of 5 stars (632)
Exterior Finish	Chrome
Global Trade Identification Number	00046587001139
Included Components	flush valves
Inlet Connection Size	6 inches
Inlet Connection Type	Flange
Item Dimensions	19 x 8 x 7 inches
Item Type Name	Fill Valve
Item Weight	0.27 g
Manufacturer	Mansfield Plumbing
Manufacturer Part Number	08-11-1/2
Model Number	08-1112
Number of Items	1
Number of Ports	2
Size	Standard
Specification Met	ASME, ANSI, OSHA, CE
UPC	785479484505 046587001139
Unit Count	1 Count
Valve Type	Fill Valve

Mansfield Plumbing 08-11-1/2 Fill Valve

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