How To Fix The Drain Plug In A Bathtub

Pinterent    September 28, 2023    Comment   

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I have a bathroom sink and fixture which are about a year old. The drain has worked fine, until about a month ago. Recently, any water I try to hold in the sink slowly leaks out. This is mildly frustrating to our cat who likes to drink from the sink, but terribly irritating to me.

Thinking the problem might be limited travel in the stopper lever (when you pull up the lever thing, at the top of its travel something hits under the sink) I got under the sink and adjusted the set screw and associated pieces so it was all shorter. Now when I pull the drain up, it is no longer klunking against something (apparently that was the set screw hitting the porcelain) so as near as I can figure the only thing stopping the drain from moving is definitely the stopper fitting into the drain. Yet water still slowly drains from the sink.

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What else can I adjust? There seemed to be a lot of horizontal/rotational play in all the drain control parts under the sink; could that be the problem?

To remove the stopper, you'll have to remove the retaining nut at the back of the drain body. Once that's removed you'll pull the pivot rod out, this will allow you to remove the stopper.

Now that you have the stopper out, visually inspect the rubber gasket around the bottom of the plug (just under the chrome part). If the gasket is worn or cracked, you'll have to either replace it, or the entire stopper.

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If you take the stopper with you to the hardware store, somebody there should be able to help you find what you need.

To put it all back together, put the stopper in the drain, insert the pivot rod (so it interacts with the stopper), then tighten the retaining nut back down. You can make minor adjustments by loosening the set screw that holds the lift rod to the clevis, and adjusting how deep the lift rod goes into the clevis.

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Pop-ups are simple mechanical devices that use a system of links and levers to move a drain stoppers up and down to seal a sink bowl or bathtub. Though they look complicated, it’s relatively easy to fix a pop-up stopper.

When a pop-up drain stopper in a sink or bathtub doesn’t work, how do you fix it? This expert guide shows how drain stoppers work and how to fix them when they don’t.

Pop-ups are simple mechanical devices that use a system of links and levers to move a drain stoppers up and down to seal a sink bowl or bathtub.

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Bathroom sink pop-ups are raised and lowered with a lift knob or lever, usually located on or near the faucet body. The knob or lever is connected to a lift rod that is fastened in many cases to a flat, slotted bar called a “clevis.”

The flat, slotted clevis is connected by a small spring clip to a pivot rod–and–ball assembly—a rod that runs through a rubber pivot ball and slopes slightly upward to the tailpiece of the stopper. This rod pushes the stopper up or lets it drop down into the drain body.

The lever operates a lift linkage that pulls on a spring. The spring pulls a rocker arm that raises and lowers the stopper (see the illustration above).

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Pushing the knob and the lift rod down causes the pivot rod to push the stopper up. Pulling the knob causes the pivot rod to pull the stopper down. If you want to remove the assembly, you may be able to pull it right out. On a bathroom sink, it’s often necessary to remove the retaining nut and extract the pivot rod first. You may have to twist the stopper to unhook it from the pivot rod.

It’s easy to remove a tub stopper to check it for mechanical problems or blockage. You’ll encounter a couple of different types of bathtub pop-ups: old-style mechanisms like the one shown in our illustration above, and newer spring-loaded pop-ups.

A common problem with bathtubs is that the pop-up stopper doesn’t close fully, fit the drain flange tightly, or open easily when the lever or knob is engaged. Stoppers that don’t close can keep the tub from filling properly, thereby wasting water. Stoppers that don’t open readily or don’t open all the way make tub drain sluggishly.

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A bathtub pop-up is a two-part mechanism: first, the stopper, which has a rocker arm that extends back toward the drain, and second, the overflow assembly, a lever that lifts or lowers a rod with a spring-like end. When you flip the overflow lever up, it pushes the rod down on the stopper’s rocker arm, which raises the stopper. Flip the lever up, and it lifts the rod, allowing the stopper to drop down and plug the drain.

Depending upon the type of pop-up, you adjust the way the stopper seats either by adjusting the length of the striker rod or by adjusting the rocker arm.

To adjust the overflow assembly, remove the screws that secure the overflow cover plate, and pull the plate and lever away from the overflow hole, partially pulling out the mechanism. Adjust the nut that lengthens or shortens the rod assembly—lengthen it to raise the stopper higher or shorten it to let it drop lower. Then push the assembly back in and replace the cover plate.

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To adjust the stopper, simply lift it out of the drain along with the rocker arm. Check the rubber seal, if there is one, for damage, and replace it if need be. Clean off hair and debris, and adjust the nut on its underside to shorten or lengthen its connection to the rocker arm. Then work the arm and stopper back down into the drain hole to make sure the flange is tightly seated (though older tubs may have corroded flanges).

Keeping the drain clear of hair, soap and shampoo residue, and other debris is one of the best ways to help keep the stopper in good working order.

Water may leak or refuse to drain around a sink pop-up for a number of reasons. If your sink pop-up won’t pop up or seat properly, fixing it is quite easy—usually just a matter of adjusting a few parts. The culprit is often a buildup of hair around the base of the stopper or the pivot rod mechanism. Or, the clevis may be out of adjustment (see illustration to identify the various parts).

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Pushing the knob and the lift rod down causes the pivot rod to push the stopper up. Pulling the knob causes the pivot rod to pull the stopper down. If the stopper sits too high or not high enough in the drain, go under the sink with a flashlight and identify these parts, per the illustration above. Pinch the spring clip to release the flat bar (clevis) from the pivot rod. Then move the rod up or down into a different hole in the clevis and replace the spring clip.

In many sinks, hair and crud accumulates around the body of the stopper, clogging the drain. You have to extract the stopper to clean it. On some sinks, you may be able to pull it right out.  But it’s often necessary to work under the sink. You must remove the retaining nut (slip-joint pliers can help if it’s frozen shut) and pull out the pivot rod first. You may have to turn the stopper to unhook it from the pivot rod.

1 With a slight twist, try to lift out the stopper. If it seems to be linked to the mechanism below, reach under the sink and unscrew the pivot rod retaining nut and pull out the pivot rod to disengage it. Use locking-jaw pliers to loosen it if necessary.

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2 Lift the stopper from the drain. Clean off all hair and debris. If the stopper is broken or its seal looks worn, replace it.

3 Face the hole at the bottom of the stopper toward the pivot rod’s