Disassembling a Fluidmaster 400ah or 400a Fill Valve

[buck1109]

Hi,
I am curious to know if a Fluidmaster 400 (a or ah) model Fill Valve can be totally disassembled (for cleaning)? (I've removed the cap and have let the water flush out the top area, although I'm still experiencing slow tank fill time. The bowl fills at normal speed. Also, I've removed the white 'corkscrew' water speed regulator, but the tank still fills slowly.)
I've been able to take most of the flush valve apart, with the exception of the chamber at the top of the 'tower' in which the water is diverted to the tank fill and the bowl fill. I've included a photo here.
I'm not sure if the white plastic part (with the 'spokes') is removable to reveal the rubber seal underneath?
Is there a breakaway diagram to show what happens under this area, where the water splits into the tank fill and bowl fill channels?

Thanks!

 

[Twowaxhack]

Since they cost $7 I replace them.

The come apart into three main pieces.
The cap assembly that retains the diaphragm.
The mid section with refill outlet and capture ring.
Then finally the shaft that connects to the tank.

You can take all that part and clean it.

 

[sarg]

Just for info ....
the center section simply slides off the base pipe that's fastened to the tank.
You just slide the "keeper" ring up and the top portion will pull off.
I replace mine about once per year due to crappy water and keep several replacements in queue.

 

[pakle]

If you think just the top seal is leaking, you can buy Fluidmaster 242 (replacement seal only):
https://www.homedepot.com/p/Fluidma...Valve-Seal-for-400A-Fill-Valves-242/100580550Should be easy to change out without removing the fill valve.

Or you can also replace the entire cap Fluidmaster 385 (Replacement Cap Assembly for 400A Fill Valves), should also be able to do it without removing the fill valve.

 

[Geofd]

I do both, replace the whole valve or just the disc, the disc usually takes care of the filling issue

 

[havasu]

I've been told the 400a has a filter about where it protrudes through the porcelain? I too just toss them, but I've been told that filter clogs first.