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I am looking for feedback about the Fluidmaster

I am looking for feedback about the Fluidmaster 400LS, we would like to use in multifamily housing.... jm

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You will be fine to use the fluidmaster. 400ls. all toilets should use them. hope this helps. duane.

Posted on Oct 04, 2009

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It is a good cheap replacement for standard toilets.
You can expect 3 to 6 years life from them depending on how dirty the water is. Many have been known to go longer than that.

It is ideal for rental units because of it's ease of operation, replacement and low cost.

If you are paying the water bill, or are concerned about saving water, it is a good idea to install the "leak sentry" device, as it will prevent the tank from repeatedly refilling if the flapper starts to leak.

Sure, you can spend $30 on an all brass fill valve system and expect 10 to 15 years out of it. But if the tenants abuse it, you still have lost a $30 valve.

If they abuse a fluidmaster, big deal, spend another 6 to 8 bucks and 15 minutes of time and it is back up and running again.

The one item you do not want to buy cheap is the flapper. Cheap flappers are known to leak right out of the package, they break easily, and are problem prone. Go ahead and buy the best flapper available for the toilet. Even then, you are looking at only 5 or 6 bucks.

Posted on Oct 03, 2009


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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

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Fluidmaster 400

Change flush valve, it comes with tank to toilet gasket, which sounds like your problem.

Aug 11, 2013 | Plumbing

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How to fix a dripping toilet

if the fluidmaster,itself is leaking, there is a rubber disk in the base of fluidmaster, replace disk. however, i can almost promise you the dripping you hear is from a bad flapper. replace with KORKY brand flapper. buy the basic black one, with no water saving gadgets on will see cheaper black ones, but get the KORKY

Dec 20, 2012 | Fluidmaster S2DBL Dual Flush Toil System

1 Answer

I have a fill valve that says Fluidmaster 747. when tank goes to fill it sprays water out at the top

There should be a small flexible tube/hose that came with this and goes over where the water is spraying out, it should look like a little nipple, the hose goes on there and then to the white tube appoximately an inch or so in diameter that goes to the bottom of the tank where the flapper ball is connected. The small flexible tube is supposed to connect to the top of the larger tube via a clip so-as to fill the toilet bowl back with water. If everything is connected like it's supposed to be then you might have a cracked fluidmaster.

Mar 11, 2011 | Fluidmaster Plumbing

1 Answer

After tank fills up, water continues to flow a little. How do you fix it?

Replace the top cap of your fill valve, or just the fluidmaster seal disc. Here is a link to the Fluidmaster fill-valve Instructions.

Sep 06, 2010 | Fluidmaster & Fits-All Faucet Connector

1 Answer

I have fluidmaster in my mancesa toilet. After flushing the toilet tank doesn't refill unless I turn off the water supply and turn it back on. What do I do to fix this problem. Wayne

First thing to do is figure out if the problem is with the fluidmaster or with the shutoff valve. If the water doesn't run at all after flushing, then instead of cycling the shutoff valve, just loosen the nut where the supply tube attaches to the fluidmaster (under the tank). If the problem is in the fluidmaster, it will start to squirt out at you, otherwise it won't. Then you know what to disassemble and attempt to repair, or replace.

Jan 29, 2010 | Fluidmaster Plumbing

1 Answer

Toilet gasket fluidmaster 7500c instructions

Fluidmaster has an instructional PDF file that I found clear and concise. Find it here:

Hope this helps.

Oct 09, 2009 | Fluidmaster Plumbing

1 Answer

I have installed a fluidmaster 400 bottom inlet

I have installed 400A or 400LS valves on systems as low as 30psi, but below that I don't know that it would work very well if you needed it to fill faster.

Keep in mind that your pressure to the toilet will be 1/2psi for every foot above the fill level of the tank, which is reduced by friction loss in the pipe and fittings on the way to the toilet.

Sep 27, 2009 | Fluidmaster Plumbing

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