A leaky toilet can add a substantial amount of money to your monthly water bill. According government statistic, 10% of US homes have a leak that wastes on average 90 gallons of water per day? One of the more common leaking toilet causes you’ll encounter is a leaking toilet inlet connection. It also be call leaking toilet cistern inlet valve. Fortunately, replacing the leaking toilet inlet pipe doesn’t require much special training or tools.
Where is the toilet inlet valve
The leaking water supply valve is the pipe between the tank and water supply valve fixed by nut. Leaky toilet inlet pipe is very common as it could be a hole in the line or worn out treads in the connection.
How to check the leaking toilet shut off valve
If there is water or wet spots or water stains underneath your toilet supply line area, you might have a leak there. To make further sure, you need to clean and dry the whole area, and then come back in 15 minutes or so and check to see if visible signs of a leak have come back. You can also place a dry piece of toilet paper over the area, and if the toilet paper is damp, you may very well have identified a leak.
There are three possible places that a toilet supply line can leak.
(1) At the nut that connects the supply line to leaking toilet tank.
(2) The nut that connects the supply line to the shut off valve.
(3) The connection where the valve attaches to the water line.
(4) The water supply line itself （leaking toilet hose）.
Here is the link about how to fix leaking toilet inlet valve .
When we determine the leaking spot of inlet line, we need a series of fixing tools: a pair of pliers and a adjustable wrench is necessary, sometimes a tower would be a plus. Also, you need to prepare the nut or new supply line to replace the old one.
Here is the process of how to fix leaking toilet pipe
1. Turn off the leaking toilet tank water supply, flush the tank
Turn toilet shut off valve to the right until it’s finger tight, then flush your toilet to drain out the water from the tank. If you don’t remember to flush the toilet, you could end up dumping a bunch of water all over your bathroom floor later on the in the process. Also, we need to soak up all the water that has leaked out onto your floor. Otherwise, the bathroom floors can be slippery when wet.
2. Loosen and remove the old supply line
Take your wrench and loosen the hex-nuts that connect the supply line to both the supply valve and toilet tank. Remember, it’s righty-tighty, lefty-loosey. Once the hex-nuts are loose, the old leaking toilet hose connector should easily lift free.
3. Put the new supply line into place
Take your new stainless steel supply line(or a plastic pipe) and attach one of the ends. It doesn’t matter which end you choose (supply valve or toilet tank), simply line it up and use your fingers to tighten the hex-nut into place. Now, attach the opposite end and use your fingers to tighten the hex-nut into place. The advantage of using a stainless steel supply line vs. a plastic one is in the supply lines flexibility. If you were installing a plastic line you’d have to cut it to size, however that means you’ll run the risk of cutting the line too short. By using a stainless steel line you’ll avoid that problem all together, and you can simply bend the supply line to fit. The next step is to take your wrench and snug up each of the hex-nuts. This will help to ensure that you have a water tight seal between the supply line and both the supply valve and toilet tank.
4. Turn on the water to test
After installing the water supply pipe, all the thing left is to turn on the water and make sure that it’s working properly. Turn the supply valve to the left until you start to hear and see water filling the toilet tank. As the tank is filling, be sure to keep an eye on your supply line and look for any leaks. If you notice that you’re line is still leaking, it’s likely that you haven’t tightened the hex-nuts all the way. You can twist some water proof tapes around the pipe connection interface to enhance the seal degree. Then you can repeat the tightening process again.
The video about how to fix leaking toilet supply pipe