On Sat, 10 Aug 2013 15:25:54 +0200, nestork
wrote:


For any newbies in here who want to learn how toilet ballcocks work,
this web page from FluidMaster tech support explains in step-by-step
detail how the rubber diaphragm in a FluidMaster 400A toilet fill valve
allows water flow into the tank, and shuts off the flow when the tank is
full.

http://support.fluidmaster.com/reald...alve_works.pdf

This link doesn't work.

I tried to find it but it said the kb is being updated, try again in a
few minutes.

Unlike the mechanical systems typically used on faucets, the closure
system used on the FluidMaster A400 toilet fill valve uses the water
supply pressure to allow flow into, and stop flow into, the toilet tank.
This is a very simple and reliable way to allow and stop water flow
which is likely to become more common in the future because of it's
simplicity and reliability.

It's good to understand how this water shut-off system works because you
find the same kind of closure in lots of other places. Clothes and dish
washers use much the same closure system to fill the appliance with
water prior to each washing cycle. Similarily, some toilet diverter
spouts use this same closure system to prevent water flow out the tub
spout when the shower is supposed to be on. And, of course, all toilet
fill valves use a variation of this same system to fill the toilet tank
after each flush.

It's just plain good stuff to know.