Hi
About 8 months ago I fitted Fluidmaster type 400 Float valve to my toilet cistern.
It has recently started to make a (loud) screeching noise at the start of the flush.
Any thoughts on cause and cure.
Cheers
David:)

You probable have some debris getting caught in the valve diaphram. You can open it up and clean the diaphram. Let me know if you want more help. Speedball1 is great with this fix too, he has some great pics that can help.

Good hit Ballenger.
I dismantled the valve mechanism and gave it a thorough clean.
It seems to have done the trick (for now).
Thanks for your help.
Cheers
David

Quote:

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Originally Posted by Brandy1943

Hi
About 8 months ago I fitted Fluidmaster type 400 Float valve to my toilet cistern.
It has recently started to make a (loud) screeching noise at the start of the flush.
Any thoughts on cause and cure.
Cheers
David:)

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Hi Brandy 1943, I work for Fluidmaster and came across your question. The answer is to remove the top cap assembly and flush out dirt and debris from yourwater system. I would not use any type of chemical cleaner, depending on the lubricant base it may harm the valve seal or other o'rings. For instructions on removing the top or any other toilet question please go to Fluidmaster and after going into our home page locate the menu bar and click onto the troubleshooting page. Their our frequently asked questions section should help answer most questions.

Mike Lagasse
FMTech

Hi FMTech
Thanks for your response.
I followed Ballengrb1's advice and cleaned the diaphram cap and then flushed the pipes before reassembling.
This seemed to cure the problem.
However. It came back (with a vengeance).
I noticed that if I pressed on the rear of the diaphram cap that the noise stopped for as long as I kept the pressure on.
I thought that this could indicate that the water pressure had increased to such an extent that it was lifting the rear of the cap and causing the 'whistle'
I've now reduced the pressure using an on-line stop tap and turning it half on/off.
This seems to be working, for the moment.
I'll post if this works long term.
Cheers
David

The problem could be the top. If flushing a second time does not solve the problem, let me know and I will replace the valve for you free of charge. Turning down the angle stop is not a real good idea because that action can cause water hammer, a banging of the pipes.

Feel free to contact me directly [email protected] or 800-631-2011 Ext. 2232

Michael Lagasse

Hi
I have given the cap and diaphragm a (very) thorough clean.
This involved removing the cap from the Fluidmaster, separating the diapragm, and rinsing under hot running water.
I then returned the water flow to ‘full’ and gave the valve body three long flushes, prior to reassembling.
The Fluidmaster web site instructions helped a lot.
Everything now seems to work OK – fingers crossed.
Thanks for the advice.
Cheers
David

Mmmmm everything here is rather dated. It would seem in 2011 the same issues exist. Fluid Master is now off my recommended list if over 3 years later a new product after 8 months roughly of use exhibits the same "whistling" issue.

I will ensure to never Recommend and tell everyone about my experience and research related to this issue.

Replace with another manufactuer who actually addresses their issues.

Thanks,

D

Hi Dcharb78

The whistling issue isn't necessarily specific to fluidmaster as any fill valve can get sediment stuck in under the refill washer/seal and cause whistling sounds.

Here, in fact, fluidmaster has made it incredibly easy to repair this issue... simply shut off the water to the fill valve, push down and twist the refill cap a 1/4 turn and then pull the washer up and out to clean it of the debris causing the issue... it's that easy!

Just wanted you and others to know, OK?

Mark