Product Description Kohler Replacement Ballcock, For The 1B1X Low Boy, Less Flush Valve OEM Reference #84499, Carded.
Customer Reviews: Missing some elements of 1B1XMarch 23, 2010 MR 2 out of 2 found this review helpful
I can only speak of the one I received and used. It looks like an exact duplicate of a 1B1X OEM unit. Has the secondary bowl fill outlet so installs like original. However the unit I used had some issues.
The low front facing adjustment screw that the OEM instructions say is to set final bowl water level had no effect whatever. The bowl level was quite low, as the unit came, and no amount of turns in either direction would cause any change.
The top seals and cutoff piston look like OEM, but actually an OEM rebuild kit will not work in this unit because the piston extension has a flat side where it goes through a matching hole in the top cover. The most common wear item with the original units is the bottom piston seat, that eventually will not fully cut off water fill. Easy to find OEM type rebuild kits will not fit. Don't know if this manufacturer offers its own rebuild kit.
Finally, there was a design difference with the top of the ballcock assembly. On the OEM unit, the lever attaching to the float rod includes an over the top (my words) detent device, where greater force is needed near end of lever travel. This means float is more submerged to provide greater lifting force. Then at the very end of travel, the detent is cleared and the extra float force is used to snap the piston down onto seat, giving a clean water fill cutoff.
On the unit I received, there was no such feature, close force of piston simply a function of float ball level. So at the cutoff point, the water flow is mostly off, but still a very small in flow sometimes, until float high enough to fully force piston closed and cutoff water. Often took 10 minutes or so. This is not a true leak, because it is not going down overflow and does indeed stop. But received complaints that had to take cover off and lift float to fully cut it off. That works, giving slight extra force on piston to seat it. But so does waiting 10 minutes for it to finally do so itself. Some might find it irritating. I tried replacing with another new piston from the second unit I had purchased, but not installed. But there was still no clean cutoff much of the time.
Even with above issues, the unit does work quite well, and beats having to buy a new toilet. I think original units are available again from manufacturer, but they are extremely high priced.
Since primary person using it was not happy with what she thought was a leak, I built a hybrid ballcock, using this one's bottom assembly, but replacing entire top end with OEM type. The screw holes did match up, but screw size and lengths were different, requiring a little extra thought.
Now it gives a clean cutoff and also will accept standard OEM type rebuild kits.
Replacement BallcockOctober 12, 2008 K. M. Sande(Powell, wy) 3 out of 3 found this review helpful
I attempted to purchase this item at the local plumbing shop and was told that it would be well over $100. Was told it would be cheaper to purchase a complete new toilet and install it. I purchased this ballcock and installed it myself. It works great and saved me lots of money.
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