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Water Leaking from Under the Bathtub Possible Causes and Solutions

Leaks are more likely to occur in the bathroom with all of its plumbing equipment, with the bathtub leading the way. The majority of the time, individuals don’t even notice the tub is leaking until mold appears or they notice water dripping from the bathroom’s ceiling. You’ve come to the perfect location if you ever find yourself in this predicament.

Read on to learn the causes and potential treatments for water leaking from under the bathtub if you have been living in an older home and are unsure of where the leak is coming from.

Why is the bathtub leaking from underneath?

Even if a bathtub leak is tiny at first, it should still be taken seriously. They will enlarge over time and could cause floods. Another reason not to put off the repair is that you already know that mould can grow. So why is the underside of your bathtub leaking?

The Bathtub is Cracked
The initial and most obvious cause, but it’s not usually that obvious. Even hairline-sized fissures sometimes lead to problems. Filling the tub with water and shutting off the tap is the simplest way to make sure. Then carefully examine the water for any regions that appear to be being drawn down. If a crack does appear, you can fix it by buying a repair kit. There are two varieties available: ones for interior repairs and ones for surface repairs. Both come with self-explanatory instructions, so putting them into practice should be simple.

Bathtub Taps are Leaking

The most prevalent issue, which no one pays attention to because water simply drains into the tub without causing mould to grow. However, continual dripping can begin to damage the surface it strikes. The taps’ rubber washers are typically to blame for leaks. If you have a screwdriver and an adjustable wrench, you can fix the dripping tap there on your own. However, it’s possible that the taps themselves are the issue and not the washers; in this case, you must contact a specialist.

Issues with the grout

It’s entirely possible that the grout shrinking is what’s causing the leak and not the drainage or pipes. Indeed, the grout around the always wet tiles may shrink. This problem is simple to solve. Regrouting the tiles with grout and silicone caulking is required. A new moisture barrier will be formed when the two are divided equally.

Bath overflow pipe leaking

This pipe can be found behind the bathtub. The gasket between the overflow pipe itself and the tub typically fails due to age-related drying out or a lack of moisture. You can alter it on your own, but you will need to do some preliminary preparations.

Water Leak

Can a leaking bathtub be repaired and how?

Depending on the nature of the issue, you may be able to fix the bathtub leak on your own in some circumstances. Finding the leak’s source is crucial so you can fix it correctly and avoid harming anything that’s already in good shape. The two most frequent causes of bathtub leaks are as follows, and you may take care of them yourself.

How to repair water leaking from bathtub drain

Replace the bathtub drain if you live in a two-story house and you observe water dripping from the ceiling beneath the tub. Although it is simple and inexpensive to complete, you will need a few things:

  • Tub drain remover wrench.
  • A flathead screwdriver.
  • Plumber’s putty.
  • A new drain if the old one is broken. It’s possible that it’s not, and instead, the seal needs replacing.
  • Vacuum cleaner.

And this is how to repair water leaking from the bathtub drain:

  • Place the tub wrench in the drain. The tool has two ends for different drain sizes; choose the one that fits snugly.
  • Put the screwdriver in the little hole in the tool for extra leverage and turn the tool left to loosen the drain.
  • Remove the drain.
  • Scrape off the old plumber’s putty from the hole using the flathead screwdriver. Afterwards, vacuum the area to remove even the tiniest of pieces.
  • Remove the gasket from between the bathtub and the drain spout. If it’s in good shape, clean it and put it back in. If it’s cracked, replace it.
  • Put the clean or new gasket inside the hole in the tub and be careful so that it won’t fall in.
  • Get a little ball of plumber’s putty and roll it, so it resembles a fat piece of spaghetti.
  • Roll the putty around the drain and do it gently.
  • Screw the drain back into the hole. Start by hand until you can’t anymore. Then put the tub drain wrench and tighten it fully.
  • Remove the excess putty once the drain squeezes it out.
  • Let the putty dry for about 24 hours.
  • Close the drain and run some water over it. This is to test for any potential leaks. If you see no bubbles, then you’re good to go.

Fixing a Leaking Bathtub Overflow Pipe

Each tub and washbasin features an overflow tube as a flood prevention measure. If the water reaches that level, it will be directed back down into the drain pipes in order to prevent it from rising past that level. Over time, the fittings deteriorate, and some water may begin to leak out and drip underneath the tub.

Here’s how to determine whether the leak under your bathtub is actually coming from the overflow pipe.

  • Find your access wall panel. It’s usually on the backside of the plumbing wall of your bathtub or shower.
  • Remove the access wall panel.
  • Look for water dripping from the plumbing. If there is non, look inside to see if water is pooling behind the wall. Puddles are signs that you likely have leaks around the drain pipe or supply line.
  • Run the shower and splash water on the tub taps.
  • Check behind the access panel again. If there’s no water there, then it’s likely that your overflow pipe is the problem.

This is how to fix the tub overflow drain:

  • Unscrew the overflow cover plate. There may be a bracket underneath it, so unscrew that as well.
  • Pull out the overflow drain assembly along with the plug.
  • Inspect the assembly and the gasket. It is possible parts of the overflow drain are loose, corroded or clogged; however, usually, the culprit is an old, dry gasket.
  • Remove the old gasket from the pipe flange. You might be able to do it by hand, but if it’s too hard, you might have to use needle-nose pliers.
  • Clean the exposed flange with rubbing alcohol.
  • Insert a new gasket in the old one’s place.
  • Position the gasket in such a way that the thicker side is at the bottom. Work it into place around the overflow assembly opening. It needs to be secure around the flange.
  • Reattach the overflow cover plate.

How much does it cost to fix a leak under the tub?

Prices for plumbing services vary, and the details of the repair frequently have a significant impact. In general, plumbing work near me might cost anything from £40 to £80 per hour and £160 to £300 per day. There are occasions when you pay one amount for the first hour and a lesser amount for each hour after that. Nevertheless, treat such figures with a significant grain of salt and contact experts for a precise price tailored to your needs.

The prices can differ because of the following factors:

  • Your location – The further away you are, the more fuel will be used.
  • Time of the year – If your tub springs a leak during the busy seasons, you will be charged more and possibly have to wait.
  • Urgency – If the leak is small, you can wait until plumbers are available. On the other hand, emergency plumbing repairs cost more and for a reason.
  • The scale of the job – a leaking bathtub will not cost you an arm or leg, however, you never know what kind of problems will come up after the inspection has been carried out.
  • Duration – each company estimates how long the job will take. Small repairs might take one to two hours. Large repairs will take and cost more.

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