Hi,

I am replacing my toilet supply line with a 3/8" compression flexible braided supply line. The distance from the value to toilet is about 6". I have tried a 9", 12", and finally a 20" flexible supply line.

As soon as I turn on the valve, water shoots out from below the plastic connector of the supply (not where the connector joins to the toilet fill valve, but just under to plastic connector at the top part of the flexible supply line).

I am able to loop the line and it is not tight. The toilet fill value has a good seal and does not leak any water if the supply line is not connected. As soon as the valve is turned on though, water starts shooting out of the flexible supply line. This is the 3rd supply line that I have tried (the others were getting kinked).

What am I doing wrong?

Some fill valves require a dome shaped washer to get a seal. Some of the riser pipes do not have a sealing surface. Look for a dome shaped washer that fits between the plastic fill and the hose. Tighten carefully. What you are experiencing is not uncommon if the washer is left out.

Plastic threads are very easily cross threaded. Check the connection again to be sure the threads caught OK. Good luck, Tom

Thanks for the replies.

I am using an MJSI Smarter Flush Technology (sold at Home Depot). The rubber washer that comes with the fill valve goes inside the tank to prevent water from leaking out of the tank. I have used this fill valve before and did not need a washer (that was a Kohler toilet, and this is a much older toilet that is not a Kohler).

I did not see any problem with the threads on the fill valve.

I have been told that I should not need a washer to place in the plastic connector on the supply line, but I can definitely go out and get one. The prior connection (solid metal supply line had a washer and a plastic nut to connect to the old fill valve). I tried the old washer with the 9" supply line and it definitely cut down on the spray. I can go and get a new washer since the old one is least 12 years old and showning wear. The washer was flat though. Is the reason it seemed to work that it gave a better compression?

Hi Lzeitz...

The fill valve comes with its own washer and it goes on the inside of the tank as you suggested... so all is good there!

That being said, the braided toilet supply always comes with a cone shaped washer inside the white nut that connects to the fill valve.

Are you pulling the cone washer out of the three hoses you mentioned you tried? If so, then you need to replace the cone washer to one of the braided hose and install to handtight plus 1/2 to 1 full turn.

For sure, the flat washer from the old supply is not correct for this application!

Let us know more...

Mark

I had to have a plumber come out. The problem was that the shank of the MJSI fill valve was not long enough and the supply line could not thread all the way onto the fill valve.

Glad you're all set. Thanks for posting back.

Oh well, at least the problem is solved, thanks for getting back to us.

I also had this problem. I was replacing a toilet and after reading this I checked the plastic shank from the old toilet. The domed rubber washer (it's pretty good size, probably a half inch long or so) was still inside there. I didn't even know it was there, so I was oblivious that I was even taking it away with the old toilet. I pulled it out of the inside of the old toilet connector, and placed it firmly inside the plastic valve shank on the new toilet (make sure to face it so the domed side goes up). This took care of my problem.

Simple fix, but it's a frustrating problem if you didn't know the rubber washer was supposed to be there (the new toilet instructions made no mention of it)