Said It Here

How to fix a leaking water pipe in a tight space

Repairing a pipe leak in a confined area like beneath attic ductwork requires choosing an appropriate temporary or semi-permanent fix to avoid high plumbing costs. However, recurring pinholes in older copper lines often lead to a frustrating cycle of repeated patches that eventually force a full-house replumbing.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    calling a plumber immediately
  2. 2
    calling a professional plumber
  3. 3
    Using spray flex seal and flex tape as a temporary or unconventional fix
  4. 4
    Installing push-to-connect fittings like SharkBites
  5. 5
    Replacing the entire water line with PEX tubing
  6. 6
    Using copper patches with pre-applied solder or compression joints
  7. 7
    filming a video of the leak before shutting off the water
  8. 8
    asking for help online while property is being damaged
  9. 9
    waiting for the ice to melt
  10. 10
    shutting off the main water supply to the location
  11. 11
    cutting the outdoor spigot pipe and capping it
  12. 12
    Using a Fernco coupling after cutting out the lead pipe
  13. 13
    Tying directly into the existing cast iron pipe
  14. 14
    added a second attachment to the hose bib that has its own shutoff valve
  15. 15
    replace the whole spigot
  16. 16
    unscrew the packing nut to replace the washers inside
  17. 17
    Cutting the pipe and rejoining the U-shape with two new couplers at the same time.
  18. 18
    Checking for the missing stiffener or ferrule ring
  19. 19
    Ensuring the pipe goes all the way over the shoulder of the fitting
  20. 20
    calling the contractor back to fix it again
  21. 21
    checking for proper slope and venting
  22. 22
    tightening connections or replacing faulty washers
  23. 23
    Turning off the main shut-off valve to stop the water flow temporarily
  24. 24
    Re-hang the pipe using steel strapping material (plumber's tape) nailed to a floor joist to relieve stress on the threaded connection, and retighten the nut.
  25. 25
    Replacing the metal-to-plastic setup with all PVC components using a PVC coupler and union
  26. 26
    Using a plastic nipple with a sharkbite female or a PEX female fitting
  27. 27
    Putting all the pieces back together
  28. 28
    Trying to patch or seal the leak using epoxy
  29. 29
    Searching for a used replacement part or faucet
  30. 30
    burying the pipe back over and ignoring the issue
  31. 31
    getting quotes from contractors
  32. 32
    Temporarily cleaning or blowing out the clogged line
  33. 33
    Doing nothing and waiting for the next backup
  34. 34
    Paying out of pocket after insurance denies coverage
  35. 35
    Removing improperly applied Teflon tape from the threads to allow the rubber gasket to make the seal.
  36. 36
    Replacing a rubber gasket that may have been ruined by overtightening.
  37. 37
    Using teflon tape
  38. 38
    Applying pipe thread compound
  39. 39
    Using WaterWeld epoxy around the edges
  40. 40
    Calling the water company to locate the shutoff switch
  41. 41
    Asking the landlord for the shutoff location and permission
  42. 42
    Replacing the flanged drain pipe temporarily with a longer one
  43. 43
    Adjusting the p-trap angle and adding a high loop to the dishwasher hose
  44. 44
    Using a poly compression coupler
  45. 45
    Installing a better quality barbed fitting with extra pipe to gain slack
  46. 46
    Applying multiple layers of teflon tape
  47. 47
    Using thread sealants like RectorSeal T Plus 2
  48. 48
    Retrying the entire setup multiple times
  49. 49
    Hiring a professional plumber
  50. 50
    Tearing out the drywall to access the fitting
  51. 51
    Attempting to seal the leak from the outside with thread sealant or adhesives
  52. 52
    Testing household fixtures like the faucet, shower, and toilet to see if the leak increases.
  53. 53
    reapplying thread tape
  54. 54
    using joint compound on metal-to-metal surfaces
  55. 55
    using pipe dope
  56. 56
    tightening connections further with wrenches
  57. 57
    Using a shielded Fernco clamp on a cleaned surface after cutting out the cracked section
  58. 58
    Applying plumbers putty and wrapping with duct tape or Gorilla tape as a temporary band-aid
  59. 59
    Saving money for a future DWV repipe or partial replacement
  60. 60
    Cover it back up and leave it
  61. 61
    Clean the pipe and solder over the damaged spot for extra support
  62. 62
    Cut out the damaged section and install couplings and new pipe
  63. 63
    Reheating the joint to reflow solder and add more flux, or testing the system with air pressure.
  64. 64
    Turning off the water supply valve to stop the leak temporarily
  65. 65
    Replacing the old supply line with a braided stainless steel one
  66. 66
    Watching YouTube tutorial videos to learn how to replace the toilet supply line
  67. 67
    Using Flex Seal Power Putty
  68. 68
    Getting a sharkbite fitting
  69. 69
    Using a repair clamp
  70. 70
    Adding pipe dope alongside thread seal tape
  71. 71
    Tightening the fittings further using additional leverage or larger wrenches
  72. 72
    leaving the nicked pipe alone if it has not leaked
  73. 73
    buying tools and materials online to fix it yourself following a video tutorial
  74. 74
    Checking if the pressure increases when the boiler runs
  75. 75
    Replacing the expansion tank
  76. 76
    Replacing the pressure relief valve
  77. 77
    Using JB WaterWeld or epoxy putty as a temporary patch
  78. 78
    Cutting out and replacing the leaking solder joint
  79. 79
    Waiting to see if it resolves itself as it acclimates to water pressure
  80. 80
    digging around it a bit more to see where it goes before doing anything else
  81. 81
    calling the call before you dig number in the area to mark out buried lines
  82. 82
    Screwing the spigot in tighter
  83. 83
    Unthreading the faucet, applying Teflon tape and pipe sealant to the threads, and reinstalling
  84. 84
    Resoldering the connection if the leak is at the solder joint
  85. 85
    Putting a bowl under the leak and waiting
  86. 86
    removing the deck board to clear out old foam and caulking
  87. 87
    Applying tar and kick-out flashing to divert water
  88. 88
    Planning to have a plumber replace and relocate or repipe the vent
  89. 89
    Wrap the crack in a few layers of rubber tape and secure with a hose clamp
  90. 90
    Cut off the raised section of the elbow and connect pieces with a rubber slip coupler
  91. 91
    Using a hub saver tool with carbide cutters to drill out the old pipe from the fitting and installing a new piece of PVC pipe
  92. 92
    Cutting back to 3/4-inch and sweating on new brass female adapters
  93. 93
    Replacing the entire water heater tank
  94. 94
    Backing off the threads on the compression nuts to tighten the fitting going into the tank
  95. 95
    Cut the pipe before the bend or elbow and cap it there.
  96. 96
    Dig out around the pipe to create working room, cut it with a small hand saw or nylon string, and use PVC primer and glue with a new cap.
  97. 97
    Repairing the busted pipes individually after they fail.
  98. 98
    Pre-fabricating a copper 90 fitting and fishing it up through the floorboards
  99. 99
    Accessing the underside of the pipe from the basement room
  100. 100
    trying to put a ton of teflon tape on the tailpiece
  101. 101
    asking if theyd rather it put together properly and just do an under sink repipe
  102. 102
    loosening both nuts, sliding the grey pipe down and removing it
  103. 103
    adding some packing string or a thick rubber gasket

In their words

Unedited, most upvoted first, each linked to the thread it came from.

The internal shut-off valve (quarter-turn shut-off handle) to the outdoor spigots was closed all winter but clearly there was still a leak.source ↗

Is this something that I need to call right away for or should I wait for the ice to melt?source ↗

sunnyk1911 · r/HomeMaintenance · 6,638 upvotes

Water line in the attic has a leak. What’s the best way to fix it? It’s right under the ductwork. Kinda in an uncomfortable stop to work in.source ↗

Rare-Ad-8026 · r/Plumbing · 3,732 upvotes

The house I grew up in started getting pinholes in the copper lines a few years ago. A new one would pop up every couple of months, then every month, then every few weeks.source ↗

deafdefying66 · r/Plumbing · 241 upvotes

We turned off the water WHILE wife was taking the video. Y’all can stop laughing now.source ↗

mxxiestorc · r/appliancerepair · 109 upvotes

Hi, I cracked into a white PVC pipe about an inch in diameter. It didn’t immediately spew anything out like water or anything.source ↗

Edit: it’s our irrigation pipe for the yard. How do I go about fixing this? Is there any possible effect on any of the other water lines in our home?source ↗

WatermeLamVIII · r/HomeMaintenance · 54 upvotes

I had the same situation in my house. After the 4th or 5th time, we just had the whole house replumbed.source ↗

panzervike · r/Plumbing · 49 upvotes

Twice now the line connected to the cold water pipe has popped off when turning on the regular faucet.source ↗

I truly don't know what I did incorrectly.source ↗

Rainey__Skye · r/Plumbing · 9 upvotes

my issue is sewer flies in the backyard and house insurance says bellies are normal and wont cover it. it clogs maybe every 2 years or so. repair the belly 20 ft or so? replace the whole line? do nothing?source ↗

Cautious-Sea7672 · r/Plumbing · 5 upvotes

I have cutting out chip board to replace and I have slightly damaged the pipe, and want to ask for advice if this lasts or need to be redone ?source ↗

Solid_Object3572 · r/Plumbing · 5 upvotes

Getting leaks at the threads after 4 wraps and very tight I don't wanna strip anythig.source ↗

DabbinDD · r/Plumbing · 5 upvotes

Roof replaced 3 years ago. 1 month after replacement this circled area started leakingsource ↗

Now, 3 years later, same leak, same place.source ↗

They have a labor warranty and said they'll come take a look at it but said there's not much they can do except re-tar and "it's just one of those things youre going to have to maintain every few years".source ↗

notie547 · r/Roofing · 5 upvotes

Never had any issues with the boiler but I just noticed the leaking a couple days ago. PSI is normal. All the valves are in the right positions. What could be causing this? Please help!source ↗

batangrizal · r/hvacadvice · 5 upvotes

The vanity plumbing is leaking where the black PVC meets the white PVC. He has already come once to “fix it.” It’s still leaking.source ↗

PhantomPlanet34 · r/Plumbing · 4 upvotes

I was pulling weeds in my front yard yesterday when I notice this leak out of the water pipe that is where our water comes in from the city.source ↗

Is this something fixable on my own? Or will I need to call a plumber?source ↗

warmmochalatte · r/Plumbing · 3 upvotes

Now, years later, the caulking breaks, and water seeps down and stays in the foam between the flashing and the deck board.source ↗

Rough-Background-375 · r/homeowners · 3 upvotes

They just shoved a PVC pipe into a lead pipe with a rubber liner and caulked around it the caulking failed and now it's leaking again looking for ideas on how to fix itsource ↗

MJF1997 · r/Plumbing · 2 upvotes

Tenant left the home and said there was a small leak. Not sure if this is something I can fix myself or call handyman/plumber. What is the thing inserted inside the faucet?source ↗

acloudis · r/Plumbing · 2 upvotes

Our sprinker system broke at this connection. It was just a coupler between the main pipe and the valve.source ↗

I can't get enough space between the valve and the main pipe to screw in a coupler as well as fitting the coupler over the pipe.source ↗

fpgsgamer · r/Plumbing · 2 upvotes

Here’s the kicker: it’s tucked away in a spot where I physically can’t get a standard wrench or tool onto it without tearing out the wall.source ↗

Iamanaspergia · r/Plumbing · 2 upvotes

It's soo tight right now, not gorilla, but tighter than expected.source ↗

DabbinDD · r/Plumbing · 2 upvotes

Hello new homeowner and looking for advice. I have a leaky solder joint on a copper drain pipe (not pressurized) and was wondering if jb water weld would be able to stop the leak or what the best options is. Is it worth getting a plumber out to fix it or can I try jb water weld first?source ↗

Inevitable-Pipe-7956 · r/Plumbing · 2 upvotes

The tub faucets leaks. And if I pull up the diverter(which is attached to the top of faucet) so that the water goes to the shower head, then the showerhead starts leaking.source ↗

I live in an apartment, and I already asked the landlord to let me know where the shutoff switch is, and I can fix it.source ↗

He doesn’t even know and expects me to call the water company in order to figure out where the shut off switch is.source ↗

Just wondering if the problem is an old and used diverter that is worn out.source ↗

I know I can fix it myself, just want to make sure it’s ok to take off the tub faucet as long as I don’t try to take off what’s behind the wall.source ↗

Greystorecombo · r/HomeImprovement · 1 upvotes

My yard sprinkler system developed a leak. I dug it up to find what looks like a really poor prior repair.source ↗

I'm trying to decide what the best repair would be.source ↗

inefficientemergency · r/HomeMaintenance · 1 upvotes

Sump pump pvc that shoots water to the outside has cracked. Right now my city is being bombarded with non stop rain so don't feel confident pulling out pvc from the house and making things worse.source ↗

What would be a temporary solution to get me through the coming days?source ↗

Ideally Id like to replace the elbow but it leads directly to the house with not much play room underneath, how should I tackle this once the stroms stop?source ↗

MagikarpLv19 · r/HomeMaintenance · 1 upvotes

I broke an underground line. I dont need it. Im going to cap it. But its now broken. And the piece is to small to hold the cap on.source ↗

Remote_Independent50 · r/Landscaping · 1 upvotes

I foolishly removed the wire to get a better look at the situation, and now the pipe is leaking when I check the tap.source ↗

Hops-TM · r/Plumbing · 1 upvotes

The white transition fitting has been replaced 3 times, already. It will be will be good for a month or two and then have a small crack with a leak.source ↗

penguin2fly · r/Plumbing · 1 upvotes

I took the p trap out to see where the leak was but I don’t know how to stop water coming out from the black pipesource ↗

I took the p trap out to see where the water was coming fromsource ↗

No-Highlight5060 · r/Plumbing · 1 upvotes

I know the general consensus is to replace this, but I'm kinda pissed off because it's a year old Kohler Triton kitchen faucet (model 7825-K-CP) and I already can't find a replacement spout. Any idea what would be the best way to patch this? Some kind of epoxy?source ↗

mikefitzvw · r/Plumbing · 1 upvotes

Update - they said the part is discontinued, and they won't replace it because the seller I purchased it from wasn't an authorized seller even though it was new in box at the time.source ↗

mikefitzvw · r/Plumbing · 1 upvotes

Now I'm just wondering if if should be a spot repair. Or if I should shove the dirt back on top and call it a day.source ↗

Not sure what the heck this metal pipe is.source ↗

SleeplessinPNW69 · r/Plumbing · 1 upvotes

Got a new faucet and water install as soon as I turn in the line it leaks from ours bolt. Does this mean the connection is not fixable?source ↗

Illustrious-Toe-570 · r/Plumbing · 1 upvotes

Took off teflon and still leakingsource ↗

Illustrious-Toe-570 · r/Plumbing · 1 upvotes

I just can seem to get a good seal on the threads, I keep having leaks, it’s a male pvc to female metal threads, I’ve used teflon tape, I’ve put compound on it as well, and finally I’ve tried waterweld as a my last resort around the edges and it didn’t work.source ↗

IllZookeepergame1727 · r/Plumbing · 1 upvotes

Not a plumber but the top piece is not connected and was being held up by the garbage disposal.source ↗

I was planning on at least replacing the flanged drain pipe with a longer one temporarily as we're getting ready for a kitchen remodel anywaysource ↗

Pure-Garden-277 · r/Plumbing · 1 upvotes

This was my FOURTH try at doing this myself.source ↗

All of the joints I have installed are holding up fine, only leaks I'm having are at the threads of the valve body.source ↗

I'm just about out of ideas on what to do next.source ↗

RedNeck_GreNade · r/Plumbing · 1 upvotes

Found a small leak on my main line out to septic. Looks like the top section was already repaired in the past. All other sections I can see look fine.source ↗

We recently purchased the house and already spent on repairs. Not sure what I am going to do.source ↗

NOTgrounded_Boston · r/Plumbing · 1 upvotes

That is the one area that my husband is having trouble with. It is leaking slightly and he needs to fix it before proceeding.source ↗

ManyHats2Wear · r/Plumbing · 1 upvotes

When I turn off the water, of course nothing leaks but after I turned the water on and flush it it starts leaking. Is this a simple fix or something a professional will have to do?source ↗

freezetime311 · r/Plumbing · 1 upvotes

I don't know much about a toilet and also my Nan's sink is low on the cold water but that's a separate issue lol. Can you link me to the parts I need and is it an easy job a non-plumber can do?source ↗

freezetime311 · r/Plumbing · 1 upvotes

Can I use Flex Seal: Power Puddy as temporary fix till i replace this old Poly-B pipe?source ↗

KnuckleMonkey_782 · r/Plumbing · 1 upvotes

Uuhhg, was trying avoid a trip to the store today lol. Oh wellsource ↗

KnuckleMonkey_782 · r/Plumbing · 1 upvotes

I believe this is a water line to the outside faucet. It has been 6 hours and has not leaked. Thoughts on what to do?source ↗

wagswag4lyfe · r/Plumbing · 1 upvotes

There doesn’t seem to be any movement. I also don’t have any tools so I would need to call a plumbersource ↗

wagswag4lyfe · r/Plumbing · 1 upvotes

The hole is only an inch and a half so it would need to be opened up more. I would need to call a plumber either way as I don’t have the tools or experience.source ↗

wagswag4lyfe · r/Plumbing · 1 upvotes

Now that it’s back on we’re seeing water is leaking slowly from a section or two in the water valve outside of my house.source ↗

OwnPhilosophy6341 · r/Plumbing · 1 upvotes

I recently discovered that it is leaking by the threads of the spigot.source ↗

The spigot did not seem screwed in all the way, so I screwed it in a little tighter which has helped with the the leaking it appears but now my spigot is sitting crooked outside.source ↗

Support-Sweaty · r/Plumbing · 1 upvotes

So the red pipe bottom row second from the end (has the yellow/blue thing around it) is dripping very slowly. Maybe 1 drop a minute.source ↗

No idea what’s going on here, I used to think I understood plumbing. What is this and how would someone go about fixing it?source ↗

Sogergaming · r/Plumbing · 1 upvotes

This entire setup is an unknown to me so I don’t want to just go turning stuff.source ↗

Or would it be better to just put a bowl under it and wait?source ↗

Sogergaming · r/Plumbing · 1 upvotes

How do I fix this without having to mess with the main line?source ↗

trevsoren · r/Plumbing · 1 upvotes

Just discovered that my water heater is leaking from this fitting... how do I approach fixing this?source ↗

silentflaw · r/Plumbing · 1 upvotes

Just looking to avoid having to sweat on a new fitting in if I can, hoping I can just tighten something upsource ↗

silentflaw · r/Plumbing · 1 upvotes

Hot water heater got replaced by plumber today as soon as the water supply to the house got turned back on a pipe in the wall busted.source ↗

When the water supply got turned on again for the second time another pipe in the wall busted.source ↗

I am so worried it’s going to happen again at a time we aren’t here to quickly react to it.source ↗

Known_Opportunity787 · r/Plumbing · 1 upvotes

Is this leak possible to fix without cutting open the exterior wall of the housesource ↗

There is a pinhole leak right underneath the floorboards in the pipe for this radiator.source ↗

A plumber told me to fix this we would need to cut open a hole in an exterior wall so he could have access to the pipe. Is this true?source ↗

Shotopo · r/Plumbing · 1 upvotes

Directly under this sink is some gray plastic pipe that is joined to the rest of the black pipes with this plastic screw on nut(?) This is where it leaks.source ↗

The nut (?) unscrews easily but I can't lift it up the gray pipe. It feels like it skips on the last thread.source ↗

AvailableMix2817 · r/Plumbing · 1 upvotes

*** the leak is front the top of the nut (?) Not coming from the threads.source ↗

AvailableMix2817 · r/Plumbing · 1 upvotes

I'm still getting a leak from every joint essentiallysource ↗

nugunsknight · r/Plumbing

Super heavy rains this AM noticed a bead of water coming from this pipe which drains under my master bath.source ↗

Thinking it may be a boot/vent I had done when I got a new roof this past April? Worth reaching out to the roofing company?source ↗

Delicious_Oil9902 · r/Roofing

Where this came up

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