I replaced the innards of my toilet with something like this, all went well. The toilet works, etc. It involves undoing the water pipe, replacing insides of toilet, then screwing the water pipe back together. I had no problems, but after finishing everything up I'm still getting a small drip from the pipe (underneath toilet base, near shut off valve).
The instructions say to only tighten the plastic pieces by hand, I've done that as much as I can. But there's still dripping from the piece that connects the toilet and the pipe.
Any tips? The instructions make it clear not to tighten with tools or use sealant. It did not drip before I unscrewed it and put it back, and there was no sealant. Do I just need to tighten it more?
Edit: Here's the pipe, it's not plastic sorry. The top black piece is new and came with the parts I bought, the bottom piece is old.
Best Answer
The toilet connections shown depend on rubber gaskets to make seals. These seals likely need replacement. In addition, I see that PTFE (white colored) tape was used. It should not be used for these fittings (or any compression or flare fittings), and can cause leaks.
Disassemble the connections. The top leak is likely caused by the washer (inside the toilet tank) not being seated correctly. The gasket should have come with the replacement fill valve. The tank should be cleaned at the location where the gasket sits. I can't tell for sure, but the nut holding the valve onto the tank looks a little bit undersized. It should completely cover the hole in the tank.
The metal flare tube also needs a washer in order to mate with the fill valve. This washer should be replaced. I would tighten it hand-tight plus 1/4-1/2 turns. In addition, the nut should be cleaned of the debris visible in the photograph.
Another reason could be that the tank was cracked. Sometimes, hairline cracks are very difficult to see, but are able to produce leaks.