Fluid Master 400a Loud

Rldev · Sep 25, 2005

Hello Folks,
I just replaced the fill mechanism of an old Kohler one piece toilet with a Fluid Master 400a. The toilet is not very loud when filling up. I have tried adjusting the water supply, but it is loud or acceptable but takes a very long time to fill the tank. Fluid Master is a good pruduct, right? Anything I can try?

Toolaholic · Sep 25, 2005

i just replaced my 2 f. masters with Korky quiet fills

they are very quiet, and i notice the flush handle takes very little pressure to flush. i,m staying with Korkys from now on

Sponsor · 2022-01-29T12:20:58-0800

Rldev · Sep 25, 2005

Where would I find these?

Dunbar Plumbing · Sep 25, 2005

I go through cases of Fluidmaster400A's a year and no callbacks, ever. Sounds like you possibly have high water pressure. Check to see what it is. Fluidmaster is the best selling fill valve out there. Kohler toilets basically are equipped with a 400A with their house brand tag on them. Those Korky's are good as well but I would determine water pressure before making any choice.

Terry · Sep 26, 2005

I use both the Fluidmaster 400A and the Korky Quietfill for replacement valves.

Fluidmaster 400A
Easy to install
Easy to adjust
Easy to find, found in all hardware stores.

Korky Quietfill
Easy to install
Almost as easy to adjust
(There is a plastic key that locks the adjustment, once you figure out this simple thing it's easy)
Quieter
Less water hammer.
Found in most, not all hardware stores

Rldev · Sep 27, 2005

What tool can I purchase to determine water pressure. I have a few areas I would actually like to measure.

Dunbar Plumbing · Sep 27, 2005

hj · Sep 28, 2005

I just replaced the fill mechanism of an old Kohler one piece toilet with a Fluid Master 400a. The toilet is not very loud when filling up. I have tried adjusting the water supply, but it is loud or acceptable but takes a very long time to fill the tank.

Either it is "not very loud when filling up" or it is "loud or acceptable", which? If it is slow to fill and loud, you have something caught in the system creating a slow fill and turbulence causing the loud whistle.

cn90 · Jan 13, 2009

Use Fluidmaster W43C!!!

Sorry to re-activate the old thread but I have been using the 400A valve: it is noisy!!!

So I called Fluidmaster HQ in California, they say the Kohler Fill Valve "Ingenium" is the same as Fluidmaster W43C. "W" stands for "Whisper". The W43C has a Rubber Flow Restrictor at the bottom of the Inlet Shank. Otherwise both 400A and W43C are essentially the same.

For now, only Home Depot sells this W43C Valve for $9.50 (a flap is also included in the package).

I just swapped the 400A for the W43C, wow.......BIG difference! Nice and quiet as brand new!
You might want to turn the Toilet Shut-Off Valve down a bit until you are happy with the noise.

Hope this helps!

SeattlePlumber · Jan 13, 2009

Use the Pro 45-B

Fluidmaster makes a fill valve with a brass shank called the 'Pro 45-B' that is almost identical to the 400A. It is much more quiet.

Fluid Master 400a Loud

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