Toilet Parts & Repair Products
Fill and Refill Valves
Fill valves connect to the supply line and regulate how the tank refills after each flush. Ballcock is the older trade term for a fill valve, usually a design with a float arm and float ball. Modern fill valves use a float cup that adjusts to tank height. Float valve parts include replacement floats and arms.
Flush Valves, Flappers, and Tank Balls
The flush valve sits at the bottom of the tank and channels water into the bowl. Toilet flappers are hinged rubber seals that lift off the valve seat and close once the tank empties. Tank balls are an older design that drops straight onto the seat on a lift wire. Both are toilet flush replacement parts that stop a running toilet.
Tank Levers and Tank Lids
Tank levers connect the outside handle to the lift chain and come in front-mount, side-mount, and angle-mount styles. Tank lids replace a cracked cover without replacing the fixture, matched by model number and the tank's length, width, and shape. Both are common replacement parts for toilet tank service.
Seals and Gaskets
Seals and gaskets stop leaks at each connection point. Tank-to-bowl gaskets seal the joint between a two-piece tank and the bowl and work with tank bolts and washers. At the floor, wax rings and wax-free rubber seals form a watertight joint at the flange. Seals and gaskets also include valve washers.
Flanges and Floor Hardware
Toilet flanges, also called closet flanges, secure the toilet to the floor and connect it to the drain pipe. Flange types range from PVC and ABS to cast iron and stainless steel ring designs, with repair rings and spacers for damaged or low flanges. Bolt caps and kits include closet bolts, washers, nuts, and caps that cover exposed bolt ends.
Miscellaneous Repair Parts
Miscellaneous parts cover the smaller toilet repair components that complete a repair, such as lift chains, refill tubes, overflow tubes, and mounting hardware. These items replace worn pieces that are not included with a single valve or seal.
How Toilet Repair Parts Work and Where They Install
The Gravity Tank Flush Cycle
Pressing the lever lifts the flapper off the flush valve seat, and water channels into the bowl to push waste through the trapway. As the tank empties, the flapper closes and the float drops, opening the fill valve. The fill valve refills the tank while the refill tube restores the bowl level through the overflow tube. Each of these toilet tank repair parts controls one stage of the cycle.
Residential Service
Most home repairs trace to four symptoms: a running toilet from a worn flapper, slow refill from a clogged fill valve, a leak at the tank base from a failed gasket, and a loose handle from a worn tank lever.
Commercial and High-Traffic Restrooms
High-use restrooms need brass or stainless steel bolts that resist corrosion and chlorine-resistant flappers where water is treated with chloramine. Tankless toilets with flushometers use diaphragm or piston kits instead, found under commercial flush valves.
Key Specifications and Planning Steps
Flush Valve Opening: 2 in. vs. 3 in.
Measure the drain opening at the bottom of the tank. A 2 in. opening is standard on many older toilets, while 3 in. openings are common on newer high-efficiency models. Flappers and flush valves must match this size.
Fill Valve Height
Adjustable fill valves telescope to fit different tank depths. Set the critical level (CL) mark at least 1 in. above the overflow tube, as plumbing codes require.
Closet Bolts and Flange Condition
Closet bolts are commonly 1/4 in. or 5/16 in. in diameter, and caps must match. If a toilet rocks, check for an uneven floor or loose bolts first. Replace the flange if it is cracked, broken, or sits well below the finished floor.
Before Ordering
Before ordering, record the manufacturer and model number, the flush valve size, the tank depth, and whether the toilet is one-piece or two-piece.
Choosing the Right Toilet Repair Parts
When sourcing toilet parts & repair components, start with the symptom and identify the part that controls that function. OEM parts from some manufacturers suit proprietary flush valves and one-piece toilets, while universal parts fit most standard two-piece tanks. Toilet repair kits that combine a fill valve, flush valve, flapper, and gaskets save return trips on older toilets with several worn parts. For service vehicles, stocking replacement toilet parts in 2 in. and 3 in. sizes, along with toilet parts and plumbing supplies such as wax rings and closet bolts, covers most calls.
Frequently Asked Questions
Where can I buy toilet repair parts like fill valves, flappers, and flush valves for plumbing jobs?
Plumbing supply distributors stock toilet repair parts by function, including fill valves, flappers, flush valves, seals, flanges, and bolt hardware. Order by flush valve size and toilet model number to get the correct fit on the first trip.
What toilet parts should a plumber keep stocked in the truck for residential and commercial service calls?
A practical truck stock includes universal fill valves, 2 in. and 3 in. flappers, a complete repair kit, tank-to-bowl gaskets and bolts, wax and wax-free seals, 1/4 in. and 5/16 in. closet bolts, flange repair rings, and universal tank levers. These cover most residential toilet repair parts calls and common tank repairs in commercial restrooms.
Ballcock valve vs. modern fill valve: which should I install when repairing an older toilet?
Ballcock is the older trade term for a fill valve, usually a float-arm design with a float ball. On an older toilet, a modern adjustable fill valve with a float cup is the common replacement because it adjusts to tank depth, takes up less space in the tank, and is typically certified as anti-siphon.
Should I replace just the flapper or install a complete toilet repair kit on a running toilet?
Replace only the flapper if the fill valve shuts off correctly and the flush valve seat is smooth. If the fill valve, seat, or gaskets are also worn, toilet repair kits replace all tank components in one visit.
Flapper vs. tank ball: what's the difference, and which one does my toilet use?
A flapper is a hinged rubber seal attached to the overflow tube that swings open when the lever pulls the chain. A tank ball is an older design that rides on a vertical lift wire and drops straight onto the seat. A chain inside the tank means a flapper; a lift wire and guide arm mean a tank ball.
Why does my toilet keep running after it flushes, and which part do I need to replace?
A running toilet usually means water is leaking past a worn flapper or tank ball, or the fill valve is set too high and spilling into the overflow tube. Replace the flapper or tank ball first, then adjust or replace the fill valve if water still runs. These toilet flush replacement parts resolve most running toilets.
My toilet tank fills slowly or won't stop filling. Is it the fill valve or the float?
Slow filling usually points to debris in the fill valve or a partly closed supply stop. A tank that won't stop filling points to a float set too high, a bent or waterlogged float arm, or a worn fill valve seal. Clean or adjust first, then replace the fill valve or float parts if the problem continues.
How do I fix a toilet that leaks between the tank and the bowl?
Shut off the water, drain the tank, and remove the tank bolts. Replace the tank-to-bowl gasket along with new bolts and washers, then tighten the bolts evenly so the tank sits level without cracking the china.
What causes a toilet to rock on the floor, and when does the toilet flange need repair or replacement?
A rocking toilet is most often caused by an uneven floor or loose closet bolts, which shims or retightening can correct. Repeated movement can break the wax seal, so replace the seal after correcting the cause. Repair or replace the flange when it is cracked, broken, corroded, or sits well below the finished floor.
The toilet handle is loose or doesn't lift the flapper. How do I fix the tank lever?
Tighten the mounting nut inside the tank, which uses reverse threads on most levers. If the lift arm is broken or the chain is too long, adjust the chain or replace the tank lever with one that matches the handle position: front, side, or angle mount.
How do I tell if a toilet needs a 2-inch or 3-inch flapper and flush valve?
Drain the tank and measure the drain opening at the bottom. An opening of roughly 2 in. takes a 2 in. flapper, and roughly 3 in. takes a 3 in. flapper. The manufacturer and model number stamped inside the tank also confirm the size.
What parts are inside a toilet tank, and what does each one do?
The fill valve refills the tank, the float shuts the fill valve off, and the flush valve channels water into the bowl. The flapper or tank ball seals the flush valve, the overflow tube prevents tank overflow, the refill tube restores bowl water, and the tank lever and chain start the flush. Each is sold as one of the replacement parts for toilet tank repairs.
Can I replace a cracked toilet tank lid without replacing the whole toilet?
Yes. Replacement tank lids are sold separately and are matched by the toilet manufacturer, model number, and the tank's length, width, and shape. Check the model number stamped inside the tank before ordering.
Which toilet repair parts hold up in high-traffic commercial restrooms?
For commercial toilet repair parts, use brass or stainless steel bolts that resist corrosion, chlorine-resistant flappers for treated water, and metal tank levers. Flushometer toilets and urinals use diaphragm or piston repair kits rather than tank parts.
What do toilet bolt caps do, and how do I choose the right size for the closet bolts?
Bolt caps cover the exposed closet bolt ends at the toilet base, protecting them from corrosion and keeping the base easy to clean. Match the cap to the bolt diameter, commonly 1/4 in. or 5/16 in., and check that the cap height covers the bolt after trimming. Caps come in snap-on and threaded styles with matching base washers.
