It’s called the bathtub overflow plate (also “overflow cover”), the round faceplate near the tub wall that shields the overflow opening.
Spot a round metal disk on the wall of your tub, usually beneath the spout? That “metal circle” has a clear name and a clear job. Most homes call it the bathtub overflow plate, sometimes tagged as an overflow cover or faceplate. It caps the opening that routes extra water into the drain assembly so a bath doesn’t spill over the rim. There is also a round metal ring at the floor drain called a drain flange. This guide spells out both names, shows how to tell them apart at a glance, and shares simple care tips you can use right away.
Quick names at a glance
Match what you see in the tub to the right term. It makes shopping and small fixes far easier.
| What you see | Correct name | What it does |
|---|---|---|
| Round metal disk on the tub wall under the spout | Overflow plate / overflow cover | Covers the overflow opening and ties into the waste-and-overflow tube |
| Round metal ring at the drain hole on the floor of the tub | Drain flange / drain strainer | Threads into the drain shoe and accepts a stopper |
| Flat trim ring behind the spout or valve | Escutcheon | Hides the hole in the wall around plumbing fixtures |
What the metal circle in a bathtub is called
The round piece on the wall is the overflow plate. It sits on the front wall of the tub and fastens with one or two screws. Behind it, a short tube meets the main drain line so rising water has a safe path away from the rim. Plumbers group that plate with the lower drain parts and call the set a bath waste and overflow. Makers like Oatey describe the system as the connection between the tub and the household drain, combining the lower drain (waste) and the upper opening (overflow) into one assembly.
When someone points to the “metal circle in the tub,” they may mean the floor drain instead. That part is the drain flange, also known as the strainer or drain body. It threads into a bent fitting under the tub called a drain shoe. The stopper sits in or over that flange, and on trip-lever setups the linkage behind the overflow plate lifts a plug inside the drain line. Once you know which circle you mean, names, parts, and fixes fall into place.
Why tubs use an overflow plate
The overflow plate hides a slot or hole that lets high water slide into a standpipe tied to the main drain. If a bath runs while you grab a towel, that opening buys time and limits spills. The plate also anchors hardware in certain stopper styles. A trip lever plate, for instance, moves a linkage that lifts a plug inside the drain line. You’ll often see two screws with a small lever in the middle on those versions.
Leave the bottom gap or cut-out clear. That opening is there on purpose so water can enter the overflow even when the cover sits tight to the wall. Sealant over that notch can trap water and stain the finish. If you see old caulk on the lip of the plate, remove it gently and let the overflow breathe.
What an overflow can’t do: it won’t save a tub left running for hours, and it isn’t a substitute for watching the fill. Treat it as a relief path that trims risk, not a magic drain. Keep the notch clear and stay nearby while water rises.
Metal circle in the tub: common variants and parts
Overflow covers come in a few layouts. Two-screw faceplates are common on older tubs and on trip lever designs. Single-screw plates appear on many newer models. Some covers snap on a hidden bracket. Others stay plain and flat with a clean look, while trip lever plates carry a small handle that you flip up or down. Retailers and plumbing houses list several styles, finishes, and hole patterns, which makes a quick ID handy when you order parts.
Overflow plate styles you may see
- Plain cover, two screws: a simple round faceplate with two visible screws. Often used when the stopper is a toe-touch or lift-and-turn at the drain.
- Plain cover, single screw: a centered screw holds the plate to a bracket on the overflow elbow.
- Trip lever plate: a handle between two screws moves a rod and link set inside the overflow tube.
- No-hole “floating” cover: a decorative cap that clips to a hidden mount, usually paired with a drain-top stopper.
Snap-on vs screw-on covers
Screw-on plates make service simple since you can back out the fastener and pull the plate to reach the gasket and linkage. Snap-on styles look clean and install fast but often need a thin pry tool or a twist to release the ring from its bracket. If you’re swapping finishes during a refresh, buy a cover that matches the mount you already have to avoid opening the wall.
Related parts down at the drain
The drain flange is the visible ring the water swirls through. A stopper sits in that ring. Stoppers come in several types, and each one opens and closes in a slightly different way. If you want to match names and actions, this quick guide from The Spruce lists common designs like lift-and-turn, toe-touch, push-pull, pop-up, flip-it, and trip lever. The style on your tub often predicts the overflow plate you have; trip-lever stoppers pair with lever plates, drain-top stoppers pair with plain covers.
Quick identification steps
Not sure which metal circle you’re pointing at? Walk through these fast checks.
- Stand in the tub and look at the wall under the spout. A round cover there is the overflow plate.
- Look down at the drain hole. The ring around that opening is the drain flange.
- If the wall plate has a small handle, you have a trip lever setup. If it’s a smooth disk, your stopper likely works at the drain itself.
- Count screws. Two screws often pair with trip lever hardware. One screw or a hidden latch points to a simple cover.
- Shine a light under the rim of the wall plate. Many plates have a small notch at the bottom so water can slip in. Do not block that notch.
If you need part names while shopping, many suppliers use the term “tub waste and overflow.” You can see that naming in this short Ferguson guide, which separates the lower drain (waste) from the upper opening (overflow).
Care, cleaning, and quick fixes
Most overflow plates are simple metal trim. A soft cloth and mild soap keep them clear of spots. Skip harsh pads that can scratch plated finishes. If the plate wobbles, snug the screws with a hand screwdriver. Stop when the plate sits flush; overtightening can strip threads or crack the elbow behind the wall.
Water marks around the plate often trace back to a tired gasket. Replacing that foam or rubber ring is a small task with a big payoff in leak peace of mind. Remove the plate, peel the old seal, press on a new one, and set the plate back in place. On trip lever versions, pull the linkage gently and watch the order of parts so they go back the same way.
When the tub won’t hold water, the cure depends on the stopper style. Toe-touch and push-pull caps at the drain may need a new O-ring. Lift-and-turn units can loosen at the set screw. Trip lever systems can bind if the linkage snags. A little patience, light cleaning, and fresh seals solve many of these small snags. If hair builds up at the flange, remove the stopper and clear the crossbars with a plastic tool to help the drain breathe again.
Handy fault finder
Here’s a compact cheat sheet you can use before you call a pro.
| Symptom | Likely part | First step |
|---|---|---|
| Water level drops during a bath | Overflow gasket or drain stopper | Check the wall plate gasket, then test the stopper seal |
| Drips behind the tub front | Loose overflow screws or cracked elbow | Snug screws gently; if dripping stays, bring in a licensed plumber |
| Lever moves but drain stays shut | Trip lever linkage | Remove the plate and clean, then reset the link length |
Sizing and compatibility basics
Plates fall into broad patterns. Two-screw covers use a set spacing and pair with trip lever hardware or with simple covers. Single-screw plates mount to a clip or bracket. No-hole covers snap to a ring. The safe path is to match the style you have now unless you’re replacing the whole waste-and-overflow kit.
Drain flanges thread into the shoe below the tub. Many homes use a 1-1/2 in. drain shoe, while some older setups use 1-1/4 in. threads. If you swap the flange only, bring the old one to the store or measure the thread. When finishes change during a bathroom refresh, you can often swap just the plate and flange with trim kits that leave the hidden plumbing in place.
A quick sizing tip: snap a photo of your plate and measure the screw layout before you buy. Bring the old flange to the store. A close match avoids extra trips.
When a full waste-and-overflow upgrade makes sense
Surface rust, mismatched trim, or a sticky lever can be handled with new plates and a fresh stopper. Full replacement makes sense when the shoe leaks, the elbow behind the plate cracks, or the linkage keeps slipping. A new kit delivers fresh seals, a clean tube set, and a matched look. If you head that route, review a maker’s overview like the one from Oatey so you know what each piece does and which kits match your tub.
DIY skill varies by tub access, age of fittings, and room to work. New acrylic tubs with a clear access panel are friendly. Old cast-iron tubs with tight walls can be a grind. If you see stains on the ceiling below or water at the front skirt, stop and call a licensed plumber. A trained eye can spot a cracked elbow or a shoe that never sealed to the tub floor.
Troubleshooting odd behavior
Gurgle at the overflow plate. Hair or soap at the lower drain can trap air and cause odd sounds. Clear the drain, run hot water, and the noise often fades.
Odor near the tub wall. A dry trap in a guest bath can let odors pass. Run water into the overflow slot for a minute to refill the trap through the standpipe.
Water weeping from screw holes. The gasket behind the plate may be pinched. Pull the plate, seat a new gasket, and tighten evenly. If the elbow shows a crack, call a licensed plumber.
Plate feels loose after every bath. Screws can back out if the gasket has flattened. Replace the gasket and add a touch of thread sealant on the screws to help them stay put.
Style picks and finish choices
Once the names make sense, matching finishes is easy. Chrome and brushed nickel rule the shelf, with matte black and brass on many remodels. You can keep the tub classic with a simple flat cover or mirror the faucet set with a trip lever plate. Stick to the same finish family for the drain flange and the wall plate so the set looks tidy.
That’s the whole story behind the mysterious metal circle. On the wall, it’s the overflow plate. On the floor, it’s the drain flange. Know the names, match the patterns, keep the seals fresh, and a bath stays peaceful.