Bizarre - Toilet Won't Fill

I've replaced all the toilet guts, supply flex hose, shut off valve connecting to the copper, even purged/flushed the copper pipe supplying the toilet etc.

Despite all my efforts when I re-assemble the toilet everything works fine for about 4-6 flushes and then the toilet will refuse to fill. It behaves as if the supply is simply blocked.

Is there such a thing as an Air Lock in toilet plumbing?? Is there a backflow preventer in a fluid master that can slam closed so hard it can't be overcome unless you drain house pressure??

The toilet is supplied of a dedicated run to the powder room. There is a T joint that has the Vertical T going to the toilet and the horizontal continues along to the sink supply. Is it possible that the sink is venturi vacuuming a backflow valve closed??

Any thoughts would be greatly appreciated.
Thanks,
HarryHomeowner

tank

IF the water does not come into the tank, then you have a bad fill valve.

Nope - not that

I've replaced the fill valve. Water will come into the tank a hand full of times but as soon as the sink runs it will no longer fill.

water

You have a problem unique to your house and it needs a plumber to check it out, if your description is correct, because as Spock says, "It does not compute".

Do you have one of the "floodsafe" supply hoses going to the toilet? If so, replace it with a standard item.

Good Question, I'll Look

It never occurred to me that there could be a food safe hose. I'll check and get back with you.

I Did have the Flood Safe supply line

Thanks a million. That saved me a service call for sure. I'll check back tomorrow and see if the midnight gremlins were at work but I'm sure that was it.

THANKS!!!!

You will save some future homeowner a service call, too, now that you've taken the time to give us feedback - thanks!

Too bad about this little "design issue" with the Flood Safe line - seemed like such a good idea at the time...

seemed like such a good idea at the time...

Click to expand...

It did,
Before I used them, I had thought about switching over to them.
And then I found out that they didn't allow a toilet to fill.
Dooh!

At first thought it seemed like a good idea...
Then when thinking about it for a little more than a split second, reality sets in...
At that point you realize that all the Floodsafe valve is protecting against is...
A No-Burst hose bursting!

Kind of redundant isn't it?

Then I get sent to a call where a floodsafe hose failed and flooded a house!
Go figure!
The Valve failed due to cheesy construction at the point indicated by the arrow!



What garbage!