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  • g_ashton Apr 08, 2011

    Didn't directly answer the question and I do have a physics degree, but I guess the suggestion was a simpe practial answer!



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The KPA is a unit of pressure. 1 kPa is approximately the pressure exerted by a 10-g mass resting on a 1-cm2 area. 101.3 kPa = 1 atm = 14.69 psi.
I am not familiar with the 400UK model because it is made for use in England, but it does not matter.
Unless you know what your water pressure is, you still would not know which to use, even if I did know which was the high and which was the low.
So I would start with the one that appears the most rugged.
And if that restricts too much, try the other one.
It can't be that hard to switch.

Posted on Apr 08, 2011


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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First shut water off at stop than flush all the water out of the tank next take a sponge and get all the water out of tank next unsrew the supply line from the valve under tank than move out of the way next unsrew the nut on the valve of fluidmaster than pull the fluidmaster out of tank stick the new fluidmaster in tighten nut srew the supply line back on turn on stop and let the tank fill up thats it if the fluidmaster dont shut off press the handle let some water out and adjust the fluidmaster screw Tip the water should stop a 1/4 inch below the flush valve tube in center of toilet

Jul 11, 2016 | Fluidmaster Plumbing

1 Answer

Why does the toilet make so much noise filling FluidMaster 703A5B

Just replace the flush valve with another one.
Flush the water line by opening valve before attaching new flush valve

If you need further help, I’m available over the phone at

Aug 07, 2014 | Fluidmaster 507C White Flush Valve

1 Answer

Glacier bay toilet :water is overflowing into the overflow pipe. Flapper seals properly.

It's hard to tell you what to do without knowing what kind of flush valve and/or float you have. You may need to adjust fill screw on flush valve or seal. Or you may need to adjust float setting to get water to shut off.
If you want to make it pretty easy then replace existing valve with a new one. I like the 400A Fluidmaster.It is easy to install ,adjust,and cheap to repair.They only cost about ten dollars and by following the instructions on the inside of the box you can do it yourself. Tgank you.

Feb 21, 2011 | Plumbing

1 Answer

When flush my toilet, water keep running until i put my hand inside the middle and pull the float , then stop. toilet make is rapid sl

the ball **** fill valve is a poorly designed valve. replace it with a fluidmaster fill valve and a fluidmaster flapper. flappers do go bad after a year or ten depending on your water quality and choice of flapper but the fluidmaster fill valve will last a long time also. you can also get the water saver fill valve by fluidmaster and there is also a conversion set to change your toilet to a dual flush. all this is at lowes and there is a plumbing pro there to explain further. feel free to give me a positive rating. thanks!

Feb 15, 2011 | Home

1 Answer

Toilet does not stop filling, water keeps running

Replace your toilet fill valve with a fluidmaster 400A

Click here


Jan 16, 2011 | Jacuzzi Home

2 Answers

My fluidmaster toilet tank filler must be plugged up. It takes 15 minutes to fill the tank. What do I do? Thank you.

This is common with high iron content in the water

The fastest, cleanest thing to do is replace it with another fill valve.
Fluidmaster makes good fill valves, that are available all over.

Another possibility, depending on the age of the house, is some type of buildup or debris in the supply line or valve.

Oct 27, 2009 | Plumbing

1 Answer

We replaced the toilet kit about 6 months ago and now the toilet runs even when the bowl is filled? What can we do to fix it.

There is either a screw on the top of the fluidmaster, or the float can be screwed out further. If it has a screw on top of the fluidmaster, screw it in to make the valve shut off earlier. Keep adjusting and flushing until it shuts off before it overflows. Hope this helps...

Oct 13, 2009 | Kohler K-3386-0 Rialto one-piece...

2 Answers

I have a 4112.016 American Standard Toilet and even with the floater all the way down the chain the water seems to keep running and going into the bowl.

1.The Flapper Valve isn't seating all the way, and allowing water to seep through. (At end of chain)
2.The Fluidmaster water control unit that is connected to the other end of the chain, isn't shutting off when the lever for it, is all the way in the down position.

Test the FluidMaster unit, by lightly applying pressure in a down motion, to that lever.
(Facing the toilet from the front, the FluidMaster water control unit is in the left corner of the tank. {Not trying to insult your intelligence}
The lever I speak of, is the small arm at the top of the FluidMaster. The Flapper Valve chain connects to this lever)

If it shuts off, you may have some fine sand, or other foreign material in the FluidMaster. [Taking one apart, and checking, then reassembling, is No fun!]

If it doesn't shut off when you apply pressure to that lever, you may have a bad diaphragm in the FluidMaster.
Suggest you replace this unit.

Aug 31, 2009 | American Standard 4112.016 Cadet Toilet...

1 Answer

Can't find replacement wter fill valve for Pegasus Cottage toilet

If you replace fill valve with a fluidmaster fill valve that should fix it right up.

Aug 23, 2009 | Home

1 Answer

Toilet won't shut off

Does it leak from the overflow? If so then the washer at the top of the Fluidmaster needs to be replaced. If it is not going over the overflow then you will need to replace the flapper on the flush valve.

Apr 11, 2009 | Home

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