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If you have a pressurized toilet, it is recommended that you call a licensed plumbing contractor to repair a leak. However, this type of toilet is known for its low mainte- nance, low water consumption and infrequent clogs.

B efore repairing your toilet, you must determine which type of toilet you have.

Pressurized Toilets

Gravity Toilets

Your bathroom probably contains a conventional gravity toilet, which relies on the force of gravity to operate.

Pressurized toilet

Gravity toilet with float ball

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In a gravity toilet, leaks will develop as rubber and other sur- faces wear, distort, or corrode.

Basic repairs in- clude cleaning, restoring surfaces, replacing rubber parts and adjusting fits and alignments.

Shutoff rod

Tank

Fill tube

Float

Locknut Washer

Stop valve Trap

Wax ring

Bowl Flush

valve Tank flapper

Overflow pipie Refill tube Ballcock

Trip lever

Flush handle

Gravity toilet without floatball

Drop-in cleaners may damage your toilet

The use of some in-tank “drop-in”

cleaners may cause damage to your toilet’s flapper valve. This will make your toilet

“run” when water leaks from the tank to the bowl. Pro- longed use of these cleaners may cause your toilet to be less water efficient.

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If a toilet runs continuously, it could be caused by kinks in the lift chain or lime buildup on the handle-mounting nut. As a first step, clean and adjust toilet handle and lift chain. The mount- ing nut in the handle has re- versed threads; loosen nut by turning clockwise. Scrub handle parts with a brush dipped in vin- egar to remove lime buildup.

Adjust lift chain so it hangs straight from handle lever, with about one-half inch of slack.

Hook the chain in a different hole in the handle lever or remove links with needlenose pliers to remove excess slack in the chain. If the lift chain is broken, replace it.

Fixing Lift-chain and Handle Problems

Next, check the surface of the water in the tank. The legal code requirement is that the water level remain at least one inch below the top of the overflow pipe. If the water level is correct, check to see if you have flapper valve leaks. (See Flapper Valve and Plunger Ball Leaks.) If the wa- ter level is not where it should be, watch to see if water is being wasted through the overflow pipe. If it is, you will have to ad- just the water level of the tank.

To adjust water level, check for adjustment screws on top of the fill valve (also known as the ballcock). If there is a screw in

Correcting Tank Water Level

the center of the fill valve, adjust it clockwise to decrease water level in the tank. Depress the flush lever to empty tank and wait for it to refill.

Adjusting toilet handle Adjusting lift chain

Adjusting water level

Lift chain Handle lever

Handle mounting nut

1"

Adjustment screw

Flush valve

Overflow pipe valveFill

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Float cup

Shank Pull rod

Spring clip

If the water level has not dropped, you can then bend the float rod.

Gently bend the connect- ing rod at- tached to the

float ball down, so that the supply valve shuts off when the water is at the proper level. If the float ball is waterlogged, unscrew and replace it with a new one.

If adjusting the float ball doesn’t help the problem, the ballcock assembly needs repairs or replacement seats. (See Replac- ing Ballcock Assembly.)

Float ball Overflow pipe

Some toi- lets have f l o a t c u p / b a l l c o c k a s s e m - b l i e s . These can be adjusted easily by g e n t l y pinching the spring clip on the metal rod assembly and sliding the clip down to lower the water level of the tank. If this fails, the ballcock must be replaced. (See Troubleshoot- ing Ballcock Leaks.)

Flapper Valve and Plunger Ball Leaks

The plunger ball and the flapper valve perform the same functions although they are different mechanisms. However, these cannot be interchanged. The plunger ball should be replaced by a plunger ball and the flapper should be replaced with a flapper.

Both flapper and plunger-ball leaks can cause toilets to run con-

stantly or intermittently. To check the flapper or plunger-ball or other flush stopper for leaks, use a long screwdriver or other thin object to apply pressure on the flapper. If water stops running upon depression of flapper, flap- per must be changed. Also, check this seating surface (flush valve seat) and possibly resur- face or replace it. If water does not stop running upon depres- sion of flapper, the ballcock must be replaced or fixed. (See Troubleshooting Ballcock Leaks.)

Tankball

Flush valve seat

flapperTank

Flush valve seat

Adjusting float ball

Unscrewing float ball

Adjusting floatcup/ballcock assembly

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To check ballcock assembly, shut off water and remove the top of the bonnet, the ballcock and the plunger and inspect for debris and remove any that is obvious.

Place a small cup over the re- maining portion of the ballcock and turn water on for three to six seconds. This should blow out any debris loose in piping. Turn off water and before reassembly inspect diaphram, plunger and

Troubleshooting Ballcock Leaks

Bonnet

Float arm Adjustment

screw

Diaphram

Plunger Plunger

seating surfaces for deteriora- tion, scars, nicks or scratches.

Any part that has obvious scars will cause further leaking and should be replaced. You may try a temporary fix by smoothing these surfaces with emory cloth.

Kits containing replaceable parts of the ballcock assembly are available at hardware and plumbing stores.

To replace ballcock assembly, empty the tank completely and using an adjustable wrench dis- connect the supply pipe or hose located beneath the toilet tank.

Remove the locknut and washer and lift out the ballcock assem- bly. You may want to take the whole unit to your plumbing sup- ply store to assure a proper match. Screw the new unit into place, put the refill tube into the overflow pipe, and reattach the float ball. Refill the tank and check to make sure the water

Replacing Ballcock Assembly

level is one inch below the level of the overflow pipe and that all parts are working smoothly.

Checking diaphram ballcock assembly

Overflow pipe Refill

tube

Attaching refill tube to overflow pipe

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Shut off the water and flush the toilet. Pull off the cap. To remove the bonnet, lift the lever on the float rod mechanism. Push the mechanism down and twist coun- terclockwise until it comes free.

Float-cup Ballcock

Cap

Shutoff lever Fillvalve

Bonnet

Shaft

Seal

Clean out any debris. Replace the rubber seal located under the bonnet if it is defective. If the shaft or housing is cracked or worn, replace the entire ballcock.

If you are confident you have taken care of all the problems in your toilet, test for leaks again by using the dye tab/food coloring test.

Even a newly installed toi- let may have a leak. If it does not, you should still make sure your toilet is op- erating efficiently by checking to see that the water level is one inch be- low the overflow pipe (a code requirement). Many toilets have a waterline mark on the overflow pipe or on the back of the toilet tank to help you set the correct water level for your toilet’s design. (See Correcting Tank Water Level for more information.) New Toilet Water Level Adjustment

1"

Checking floatcup ballcock assembly

Adjusting water level

References

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