How To Fix Tub Spout Leaking from Back?

Do you ever found yourself in a bad state while taking shower through the bathtub while the tub spout leaking from back? Having home plumbing errors is a common enemy of people especially when they don’t take care of it.

And so, nearly all homeowners are looking for the ideal solutions to this hassle. Before we get to the topic, it would be nice if you know each part in detail. Be sure to see the second floor bathroom plumbing diagram to get ideas if you own a 2-floor house.

Plus, consider the types of it to easily take steps when facing leakage. Basically, there are 3 kinds of spouts used in the bathtub and these are:

  1. Slip-on Spout
  2. Screw-on Spout
  3. Screw-on Spout with Threaded Assembly

In this guide, we’ll talk about the easiest methods that would work on every type of tub spout so that you can fix the hitch at ease. Let’s Drive Into That!

Track Down Tub Spout Leaking from Back & Fix It!

There are 3 problems of leakage from the back in the bathtub spout such as the clog, wrong alignment, and breaking of sealant. To fix that, you have to clean, adjust the pipes, and seal rightly. And if nothing works, replace the tub spout.

Reasons for Tub Spout Leaking from backEasy Solutions
Clogged spout / bad position of pipe / exposed sealantClean and adjust pipes with the right sealing
Bad tub spout Replace with a new one

Being able to locate the tub spout leaking when water is off in the backside is something that needs to be done precisely in order to take action. You’ll need to solve the leakage once you identify the problem.

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According to FamilyHandyman,

Worn rubber washers, seals or gaskets in the valve assembly cause most leaks. Here we’ll show you how to fix a stem-type valve, which is common in older, two-handle faucets (separate hot and cold). We won’t cover single-handle faucets here.

Anything can be the reason for the bathtub spout leaking as you have to inspect inside the part. The process will take not more than 30 – 40 minutes to fix the leaking. Now, let’s get into the methods.

Diagram for fixing tub spout leaking


  • Loosen the set of screws
  • Take out the spout from adapter and copper pipe. Be sure the spout is flushed with the wall.
  • Check if any defect occurs or not.
  • If yes, then move to the methods. Or else, put back everything.

Fixing Dirt, Uneven Adjustment of Pipe, & Sealing Error to Stop Leaking of Tub Spout.

Step-1: Take out the spout after cutting the caulk around it. Be sure to secure the tub spout spacer in a noticeable place.

Step-2: Next, grab a cleaning stick and take out the debris inside the inner pipe.

Step-3: Open the water supply line so that it cleans the dirt which is stuck on the opening.

Step-4: Check whether the pipe is adjusted rightly or not. If not, then be sure to set it rightly.

Step-5: Detach the O-ring and clean it. Then, take out the adapter from the copper pipe nipple.

Step-6: If any part is damaged, then replace that. Or else, attach the adapter in its place using Teflon tape or a strong sealant.

Step-7: Attach the O-ring, tub spout, and other parts rightly.  And, that’s it.

How To Replace a Damaged Tub Spout That Leaks from The Back?

  • Start by turning off the water supply. Take out the tub spout by removing the caulk.
  • Then, take out the O-ring and adapter from the nipple of the copper pipe.
  • Be sure to clean the glues if you locate some.
  • Next, check if anything is broken or not. If yes, bring the new tub spout kit to attach.
  • Insert the adapter and O-ring into the copper pipe. And turn it clockwise and tightly fit it. Try to use Talfon tape or sealant.
  • Polish the adapter with caulk and then attach the tub spout. Be sure to insert it rightly.
  • Turn on the water supply and test it out. And, you are done.
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A Helpful Tutorial You May Need!

Frequently Asked Questions (FAQs)

What is a slip-on tub spout?

Well, the slip-on spout is an internal attachment that fits on the copper pipes. It as well has an opening in the downside and this is being protected with the set screw to tightly grip the spout in the pipe. It works great to hold them at the same time.

Do you need to shut off water to change the tub spout?

Even if it is suggested by experts to never change the tub spout when the water supply line is working, still you can do it. The process won’t be different just you don’t turn off the water. Just be sure to turn on faucets including the toilets, bathtubs, showers, basins, and so on.  
This way you can safely change the tub spout by lessening the water pressure coming from the faucets. And, it will be easier to do that.

Are tub spouts universal?

Most tub spouts made from brands are designed in fixed size so that they can be used for any bathroom purposes. Yet, there are some of them that are either small or big in size. And also, the tub spout kit comes with adapters, wrench, and tape to attach well.

Final Thoughts

Not feeling confident to solve the issue of bathtub leak in the rear even after reading this guide? Well, it should not happen. In fact, the methods given above are worth fixing the error well as a lot of people find the tricks effective.

As the main causes are due to the clog, uneven fitment, or maybe wrongly sealant, no matter what are you facing, it can solve by cleaning, adjusting inner pipes, and sealing them rightly.

Hope this article didn’t disappoint you in order to fix the tub spout leaking from back. Yet, if it didn’t work to treat the error, then you better hurry up and seek help from an expert. Now, It’s Time To Bid Farewell. Have A Nice Day Ahead!

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