Replace Toilet Fill Valve

How to replace toilet fill valve on leaking toilet.

replace toilet fill valve
replace toilet fill valve

Replace toilet fill valve on a leaking toilet is just one of those easy to do jobs with just a couple of hand tools that most people have in there home. We can replace the rubbers in any toilet float valve but the problem is that it’s still old. Spending all its life submerged in water things can and do perish over time. The simplest thing is to replace the complete valve and have it trouble free years to come.

Replacing toilet fill valve.

What you will need is an adjustable spanner that will open up to the size of the nut that holds the valve in place.

Towel to clean up any excess water that spills onto the floor.

New toilet flush valve.

New flexible water hose optional

Check the toilet stop tap for isolation. If the water doesn’t completely turn off at the stop tap you may need to turn the water mains off.

Replace toilet fill valve.

Now first of all. Make sure the water is turned off. Check the toilet stop tap for isolation making sure there is no water entering into the tank. Nothing worse taken the hose off and water is still leaking out of it and onto the floor or bucket you have. If it is not isolating the water completely now you may need to replace this isolation tap or turn the water off at the mains of the property. Once you have all that organised lets move on to getting the job done.

Drain all the water that is in the toilet tank. As much as you can drain less will spill on the floor so give it one more flush. Once it’s all drained remove the water inlet pipe or hose. This could be copper pipe or a flexible hose. This is the hose that connects the toilet valve to the water supply. Either way its needs to disconnected before you can remove the float valve. This pipe or hose will be under the toilet cistern tank. Once the pipe is removed off the valve there is a plastic nut that holds the toilet fill valve to the tank. Remove the plastic nut that holds the valve in place. This nut is situated underneath the tank just above where you took the pipe off. Now remove that toilet flush valve by undoing the plastic nut and lifting the float out up through where top. Of course you will have to take the lid of the tank first.

Installing new toilet float valve

Remove new float valve from the box and install rubber grommet over the threaded end. Make sure that the flat side of rubber is facing the flange on the float valve. Place the new water float valve into the same position as old one. When in position screw the locking nut from underneath back on and tighten. Take care when you tightening up the toilet valve that no moving parts rub against the sides of the tank and fouling its operation. Once the bottom entry float valve is in position install the water pipe back onto the float valve where the thread is. When installing the water pipe always connect the pipe to the valve end first. What I mean by that is the float valve thread is plastic and the stop tap is metal. It is much easier to cross thread plastic than steel. Just a friendly tip there.

Test and commission 

Once the valve is installed turn on the water so we can set the toilet flush level. Fill up the cistern tank and check for any leaks.  If  there are no leaks and you are happy. Flush the toilet a couple of times and then you may have to carry out a toilet float valve adjustment to adjust the water to the toilet flush level. Most toilet cisterns have marks on the inside that gives you a water level height. Normal adjustment is around 9 litres for a full flush and 4.5 for a half flush. Newer toilet suites use less water and are more environmentally friendly so saving water at 6 litres for a full flush and 3 litres for a half  flush. If you are looking for more info on other diy plumbing jobs for home then have a look here for more helpful tips

Check Out This Awesome Book On DIY Plumbing

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