|Name||400A Universal Toilet Fill Valve||QuietFill Toilet Fill Valve||QuietFill Platinum Fill Valve||2X Long Life Toilet Fill Valve|
|Plumbing Part Type||Toilet Fill Valve||Toilet Fill Valve||Toilet Flush & Fill Valve||Toilet Fill Valve|
|View Product||View Product||View Product||View Product|
Check and see that the chain that connects the flapper is not only still connected properly but to proper taughtness. I find the chain gets under the flapper and does not allow it to close completely. It is closed enough to fill and turn off but the water flow but the slow drain back down under the flapper causes the periodic refill for a short time hence the 3-5 seconds every 5 minutes. If you had a leak you probably would have seen it by now.
Should be fine, because: I wasn't able to adjust the height by turning (un/screwing) the two parts as instructed, so I took it back to HD. The clerk did exactly as you did; just yanked the two tubes apart. We reassembled it, adjusted to correct height, installed it, and after 3 yrs, no problems.
The height of the valve is adjustable.
They don't make the "Model 400" anymore. I bought my house brand new in 2009 and it came with "Model 400". Now in 2019, my toilet is filling very slowly so I searched for a "Model 400", but that model has been replaced with the "Model 400A". The difference is that the "Model 400" didn't have a bowl fill tube that goes down the overflow tube. But it looks like the "Model 400A" does utilize a bowl fill tube. I studied my old Model 400 and wondered how the bowl refills without a refill tube, but after 99 flushes, I still cannot figure out how the 400 accomplishes it. Black magic maybe ;-)
Vahandyman is spot-on. The toilet model you stated ( K3397-0 San Raphael ) is a Kohler one-piece lowboy style with unique features (rim flush). The Fluidmaster is not designed for this application. The kit mentioned by vanhandyman is the way to go.
The Flush valve kit is all you need. Although i would recommend the fill valve kit also it has dynamic engineering and will last a lifetime these are great products.
My experience is a slow fill valve has minimal effect on how complete the flush is. The newer toilets with a water conversation low gallon per flush rating may ocassionaly require a double flush.
could be water line pressure, or valve is not open all the way, or valve is partly blocked
By turning the screw left lowers water level. turning right raises level. Remember that the Center Line which is marked on the top of valve must be above the overflow tube and the rubber hose must be above the tube using the clamp provided in order for the valve to oporate properly.
New flapper valve. If you watch a working toilet flush, the flapper floats up for a few seconds, and then flops down to seal the drain hole. That or your tank isn't filling enough before you flush to keep the flapper up long enough, or your handle isn't raising the flapper up high enough. If the latter, shorten the chain.