Question 1

My Fill valve does not turn off completely.Response from Kohler said to take red cap off and purge water through it.  Anyone know what this means? All seals new and not leaking.

Accepted Answer

I used this tech tip to fix mine. It worked! My issue was related to calcium buildup under the yellow (or red for some) cap. I just scraped away the buildup, flushed it per Kohler video listed above and reassembled. Fixed! I am on well water... so my calcium levels were high before adding my water softener.

Question 2

How tall is this piece?  I need 9” one

Accepted Answer

It is adjustable. Set your height as you need.

Question 3

I am looking to replace a Fill Valve that has a yellow cap and the part number is 1188946. Is this the correct replacement part?

Accepted Answer

I looked at the old one and it had a number on the top, if the numbers match it will work

Question 4

Where is this fill valve (GP1083167) made?

Accepted Answer

Socrates:
Wrong answer. You should be answering the question asked. Don't you hate it when someone "attacks" you in their response?

I am not certain where it is made but I'd be surprised if it was somewhere other than ChAsia or Mexico.

My history of life with these, fwiw:
It appears to be a (copy of a/the ?) Fluidmaster (style) fill valve. I have replaced the arm float ball cock fill valves with a/various Fluidmaster unit in my rentals since 2000 or 2001 and remain very satisfied with them and their life. 
I have replaced the "rubber" washer/disk/valve when needed while also scrubbing/cleaning/wiping the seats (mating surfaces) of that disk AND the float of all scum/deposits that weigh it down and alter the fill level/boyancy.  
It IS often possible to clean that disk, the seats, and the float to obtain at the least a temporary fix; a NICE option when the valve is "screaming" or "whistling" and you can't immediately replace it.  Yes, there have been a few times when a new disk and through cleaning didn't solve the problem/leak and I replaced the entire fill valve.

Life is good!

ASIN	B001GZVSX6
Best Sellers Rank	#358,648 in Home Improvement ( See Top 100 in Home Improvement ) #688 in Flush Valves
Brand Name	Kohler
Connector Type	cap
Country of Publication	USA
Customer Reviews	4.6 4.6 out of 5 stars (9,841)
Exterior Finish	Black
Global Trade Identification Number	00650531688415
Inlet Connection Size	1 Inches
Inlet Connection Type	Female Iron Pipe
Item Dimensions	29.8 x 9.5 x 7.6 Centimeters
Item Type Name	KOHLER GENUINE PART GP1083167 Silent Fill Valve Kit For All Kohler Class Five Toilets
Item Weight	0.25 Pounds
Manufacturer	Kohler
Manufacturer Part Number	GP1083167
Material Type	Plastic
Model Number	GP1083167
Number of Items	1
Number of Packs	1
Number of Pieces	1
Outlet Connection Size	1.5 Inches
Outlet Connection Type	NPT
Size	12.5" x 3.5" x 3"
Thread Size	1-1/2 inch NPT
Thread Type	NPT
UPC	650531688415
Unit Count	1.0 Count
Valve Type	manual

Genuine Part Gp1083167 Silent Fill Valve Kit For All Kohler Class Five Toilets,12.5" x 3.5" x 3"

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