Toilet Tank overflow wasting water need manual.

Take cover off tank and check to see if the small tube that squirts water into the overflow tube is actually discharging into the overflow.

If this is unclear flush toilet with tank lid off and observe operation.

Generally there is a small metal clip that holds the small tube to squirt into the overflow.

Troubleshoot Your Toilet Without a Plumber

www.popularmechanics.com/home/how-to/a4117/4303948/

Overflowing, constantly running and sweating toilets can test a home owner's sanity. ... take for granted--until we can't take a shower or make the toilet flush properly. ... If none of the above does the trick, you may have a misadjusted or faulty fill ... the waterlevel a half inch below the top of the overflow tube inside the tank." ...

Emergencies - Overflowing toilets - Toiletology 101

www.toiletology.com/emergenc.shtml

You can't just lower the water level in the tank; you need to displace some of ... and the ballcock and flapper are working properly and shut off when the tank is full. ... The bowl is filled with the water that goes into the overflow pipe. ... Unfortunately, when a toilet bowl is clogged and the water level rises and doesn't flush the ...

That's an interesting one! Does the flush valve close properly so the tank can refill? Does the float valve allow the tank to refill fully, to near the top of the overflow? That can be adjusted, if it doesn't.

Check fhe flush valve - you may have an obstruction under it. Also check the water port from the bowl side - feel up inside the port for obstructions or buildup of hard water deposits.

WASH YOUR HANDS THOROUGHLY afterwards.

check the fresh water feed tank to the toilet is connected correctly and is that tank steel as it could be rusty ! ??

There are only a coulple of places that the toilet could leak or, overflow and give you this problem. When you replaced the flapper valve, did it have an extra piece of rugger on it? Universal flappers have a round piece on them that are designed to fit over the overflow tube. If you flapper had this piece and you don't have need for it, you need to cut that out, if the flapper "hooks" to the overflow assembly. Leaving that piec on can contort the shape of the flapper and make it so it won't seal. If you are noticing constant movement(slight swirl) in the bowl, make sure the back tank is not constantly overflowing into overflow tube. If this is the case, your water level is too high. You will either need to adjust the water level and/or replace the fill valve. If you can hear the toilet running or leaking, push down on the flapper, if it stops, you have a problem with the flapper and/or the chain adjustment. When you install the flapper, you have ton make sure the chain is long enough to let the flapper fall and seal but, not so long that it can tangle or get between the the flapper and it's seal below it.

Hi, W/D here.
Check the water level in the tank. The force to flush waste comes from there. Normally the fill line is cast into the back of the tank, but sometimes it is on the overflow tube. Raise the level if it is low.
Also, make sure that the tubing from the fill valve is connected to the over flow tube (the tall tube).
Best regards, --W/D--

Sounds like you have a clogged drainline or vent-stack. Fill a large bucket with about three gallons of water and dump it quickly into the bowl. If the drainline/vent is clear, the toilet will "flush" like a gravity toilet and the water will drain from the bowl almost as fast as you can pour it in.

If the water level in the bowl slowly rises (as if it's about to overflow) and then slowly drains, you have a clog somewhere.

All toilets, regardless of their flushing mechanism, require a clear, unoibstructed drain/waste/vent system to extract waste.

If the toilet "flushes" with the bucket of water, you may want to call Flushmate tech support (the number is on top of the tank) or check out the installation and troubleshooting videos at howto.flushmate.com.

Hope this helps.

Does this tank have the plastic bucket around the flapper inside the tank. If so this is a water saver toilet. A few tricks to increase the water. I have had to remove the bucket by cutting it maybe half into to increase the gpm.
This will increase it to more than 1.6 gpm's. It can be cut down just be careful in doing it if this is the problem.

Next make surethe fill valve has line running and attached to overflow tube. This will fill the bowl with the needed water for it and the tank.
Next make sure the water is set to the mark either on the tank or the overflow tube. If no mark to within 5/8" to top of overflow tube .

the fill valve shut off level setting is too high. water in the tank is overflowing in the overflow tube. adjust fill valve to shut off at lower tank level