4 Ways to Fix a Rusting and Leaking Cast Iron Sewer Pipe
- Hydro-jetting. Not long ago, clogged sewer lines were snaked using long, steel augers. With hydro-jetting, just as...
- Pipe bursting. If a pipe has lost its structural integrity or has a straight run, we will use pipe bursting instead.
- Trenchless sewer pipe lining. Also called structural pipe lining, or...
Full Answer
How to cut and replace cast drain pipe?
How Much Does It Cost To Replace Or Repair A Drain Line?
- Cast Iron Drain Pipe Replacement Cost. Replacing your pipes can cost you $200 to as much as $15,000. ...
- Cost to Repair Drain Line Leaks or Breakage in the Home. Repairing a drain line ranges from $226 to $967. ...
- Sewer Line Repairs in the Yard. Repairing a sewer line costs about $2,600. ...
- Additional Cost Factors. ...
- DIY Repairs vs. ...
- FAQs. ...
Should you repair or replace cast iron sewer pipes?
- Plastic piping hadn’t been invented yet
- Cast iron pipes have a long life and were built to last for anywhere between 80-100 years
- Cast iron plumbing is durable and can withstand heavy loads/high-pressure
- The material deadens the sound of flowing water and sewage very well
How to repair cast iron with JB Weld?
How do you fix broken iron pieces?
- Sand the broken surfaces to remove approximately 1/4 inch of paint from both ends of the break. …
- Remove grease and dirt from the surface of the wrought iron with a clean rag dipped in mineral spirits.
- Apply the epoxy to the surface of the wrought iron and put the two pieces together.
How to cut and replace cast iron pipe?
To cut cast iron with an angle grinder, you will need to do the following:
- Mark the cut line on the cast iron pipe using chalk or crayon. ...
- Use a diamond cutting wheel/blade to cut through the cast iron with an angle grinder.
- Run the angle grinder along your cut line by applying even pressure all the way around the pipe.
- Safely remove the pipe from the plumbing segment after you have completely cut through the pipe.

How do you repair a cast iron drain pipe?
3:458:12How to Repair Cast Iron Pipe Cracks, Avoid Plumbing Fails - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd you kind of knead it. Around. Make sure you've gotten all the way. Through. It and i'm going toMoreAnd you kind of knead it. Around. Make sure you've gotten all the way. Through. It and i'm going to scoop it here. And apply it right on the area where the crack.
Can you Rethread cast iron pipe?
If you have a small section of visible cast iron drain pipe with a leak or crack, you may repair the pipe yourself. But only if the problem is small and isolated, if there are leaks and cracks everywhere, you better call the professionals. You can use cast iron repair paste or plumber's epoxy to fix holes or leaks.
How do you repair a cracked drain pipe?
0:001:35How to Repair Cracked Drain Pipe [EASY] - YouTubeYouTubeStart of suggested clipEnd of suggested clipLet's go ahead and apply this we get the release liner get an edge started. This release linerMoreLet's go ahead and apply this we get the release liner get an edge started. This release liner started. We're gonna put it right over the hole. And then I'll finish pulling the release liner. Down.
How do you seal a cast iron pipe joint?
Work the dampened compound into the joint a few inches at a time. Then tamp it down with a hammer and caulking iron. Continue adding and tamping the caulking a few inches at a time until the complete length has been packed into the joint.
Can you repair cast iron with JB Weld?
First, buy epoxy putties such as Quick Steel or JB Weld at your local hardware store. These two types of epoxies will serve as glue and will adhere to cast iron and fill the crack with a safe seal. Using 80-grit sandpaper, sand the cast iron to remove any paint and rust that might be covering the crack.
How do you use JB weld on a cast iron pipe?
All you have to do is wet, apply and let it dry and in 15 minutes it hardens like steel!...J-B Weld FiberWeld Pipe Repair CastSet Time: 5-10 minutes.Cure Time: 15-20 minutes.Water Pressure Strength: 500 PSI.Surface Applications: Copper, Cast Iron, PVC, ABS, Galvanized Steel, Rubber and more!
Can I use plumbers putty on a cracked pipe?
Epoxy putty Once you are finished sanding, dry the pipe again to remove any particles. Apply the epoxy putty to the cracked plumbing pipe and press it around until it creates a flattened surface that conforms. You must do this quickly as epoxy putty typically starts drying within 1-2 minutes.
How long do cast iron drain pipes last?
between 80-100 yearsThis is why they are not used as much in plumbing construction and installation today. Cast Iron: Cast iron pipes last between 80-100 years, and are built to withstand a high amount of water pressure. However, like galvanized steel, cast iron piping has been found to be susceptible to rust over time.
Why do cast iron pipes crack?
Old cast iron pipes with heavy rust buildup and corrosion will eventually develop hairline cracks, which are also subject to the ravages of time. Eventually, those hairline cracks become wider and longer, until eventually the pipes begin to leak or fail completely.
What is used to seal cast iron pipes?
Oakum can be used to seal a cast-iron pipe joint.
How do you extend the life of a cast iron pipe?
To extend the lifespan of cast iron pipes, homeowners can take a few key steps:Avoid exposing pipes to grease and chemical drain cleaners. Metals corrode due to exposure to certain chemicals, and modern drain cleaners aren't appropriate for cast iron lines.Look for signs of pipe damage. ... Keep pipes clean.
What causes a cast iron drain pipe to crack?
Old cast iron pipes with heavy rust buildup and corrosion will eventually develop hairline cracks, which are also subject to the ravages of time. Eventually, those hairline cracks become wider and longer, until eventually the pipes begin to leak or fail completely.
Do cast iron pipes collapse?
Severe rusting and corrosion can also cause holes or cracks to form in cast iron sewer pipes. If this corrosion is allowed to continue, eventually your cast iron sewer pipe can completely collapse, resulting in an emergency situation. Another common problem with cast iron sewer pipes is an uneven interior surface.
Do cast iron sewer pipes rust?
Just as with any metal pipe that comes directly into contact with wastewater, the interior of cast iron pipe will rust over time. Rusting on the interior of the cast iron pipe has a two-fold effect which reduces the flow of the sewer line.
How much does trenchless sewer repair cost?
Trenchless sewer repair can cost anywhere between $4,000-$15,000 for the average single family home.
How long does a sewer repair project take?
Trenchless sewer repair can take as little as one day. Conventional sewer repair may last a week or more.
Will trenchless sewer repair destroy my home?
No. Trenchless sewer repair does not destroy your home. No trenches will need to be dug through your home or property.
What is your service area?
New Flow Plumbing provides sewer repair services to customers within a 20 mile radius of our office at 6718 Katherine Ave Van Nuys, CA 91405 includ...
How long does trenchless sewer repair last?
Trenchless sewer repair typically adds 50 – 100 years of life-use to your sewer lines.
Does it come with a warranty?
Yes. We provide a minimum 7-year parts and labor warranty on all sewer repair projects.
How long have you been in business?
We have been family-owned and operated for over 10 years.
Does trenchless sewer repair require a permit?
City requirements may vary. Please call for details.
What other services do you provide?
Besides trenchless sewer repair, we offer: Hydro-Jetting Sewer Camera Inspection Drain Cleaning Water Heaters Residential and Commercial Plumbing R...
Are you licensed and insured?
Yes. Our California State License Board (CSLB) number is 974766.
What happens if a drain pipe leaks?
When a drain pipe leaks sewage, the excess water will cause the soil to expand and shrink (if the foundation was built on top of expansive soil) causing your foundation to shift. If a drain pipe is damaged, rats, mice, sewer flies, cockroaches, or palmetto bugs can enter your home.
How much does it cost to repair a sewer line?
Conventional sewer repair, on average, costs $50 to $450 per linear foot. The price to install brand new pipes throughout your home or yard could run to $15,000 because of all the extensive work, such as trenching and excavation.
What is a bursting pipe?
Pipe bursting is where a new HDPE (high-density polyethylene) pipe is attached to a winch with a cone-shaped bursting head and pulled through the damaged line. The damaged pipe breaks apart as the new one takes its place.
How long does cast iron last?
They are supposed to have a life-use of around 50 to 100 years, but unavoidable circumstances affect the material’s longevity. Signs you might have a problem include, If you have backups in all of your toilets, sinks, and showers, the cast iron sewer pipe (which connects all of them) is probably faulty. If you can smell sewage in your house, you ...
What happens if you put a pipe under a concrete driveway?
If builders laid a pipe underneath concrete, it had to be chipped away with jackhammers or picks. If your line ran under your driveway, that would mean pavement, asphalt, or brick had to be broken apart. Let’s not forget inside your kitchen or bedroom.
What color is cast iron?
Most homes built before the 1970s are equipped with cast iron pipe. Their blackish-brown color and hard material help identify them. Cast-iron drain pipes are strong, but nature has a way of breaking things down over time.
Can a plumber use trenchless sewer?
Plumbers cannot use trenchless technology on pipes that are back-pitched, which means that the original contractors failed to use the proper slope for your sewer line to your city connection. If the pipe has collapsed onto itself, you will have to go the conventional trenching route.
Why does my cast iron sewer line fail?
There are many reasons why your cast iron sewer pipes are beginning to fail. First off, all iron rusts when exposed to moisture or oxygen. Your sewer pipes are going to be constantly running waste and sewage, causing them to rust and corrode.
What does it mean when your pipes are rusting?
Those roots will begin to reach and touch your pipes, even breaking inside them to cause problems. Here are a few things to watch out for that means your pipes are rusting and leaking. Odors that smell like sewage. Slow draining and clogging in your pipes. Mold growing on your walls or floors.
How to get sewer lines working again?
How to get your sewer pipes working again. 1. Hydro-jetting. Not long ago, clogged sewer lines were snaked using long, steel augers. With hydro-jetting, just as the name suggests, we use high pressurized water to clean out clogs. We can even remove small tree roots in the pipe.
Can you replace cast iron pipes with PVC?
You may think that just replacing old pipes is the faster and cheaper solution to failing cast iron pipes. If you cut out a leaking or rusted section of pipe and replace it with PVC, you now have two ends that will leak soon. The cast iron on each side will continue to crumble or crack and break.
Can you repair sewer lines with trenchless methods?
Conventional sewer repair. Unfortunately, sometimes a sewer pipe is so badly damaged that no trenchless sewer repair is available. Pipes that are back-pitched, meaning the original contractors failed to use the right slope for your sewer line to your city connection, cannot also be fixed using trenchless methods.
Cast Iron Pipe Repair: Instructions
Old cast iron pipes are intimidating for homeowners. Because they lasted so long without problems, most people ignore them. But you do so at your own peril. All cast-iron pipes eventually break, corrode, or leak. And when they do, it’s often a leak from the cast-iron joint.
Final Thoughts
Those old cast-iron pipes, most often found in older homes, look intimidating. That, and because they lasted so long without problems, is probably why homeowners are often too scared to mess with them. But they eventually break, corrode, or leak. And often it’s from the cast-iron joint.
Call 1-Tom-Plumber
Don’t hesitate to contact us here or call us at 1-Tom-Plumber (1-866-758-6237) if you need help with a drain repair or replacement, including your stacks and vents.
What causes a drain pipe to shift?
Foundation Cracks – When a drainpipe leaks sewage, the excess water will cause the soil to expand and shrink, causing your foundation to shift. Invasive Creatures – If a drain pipe is damaged, rats, mice, sewer flies, cockroaches, or palmetto bugs can enter your home. Calling pest control may eliminate the current invaders, ...
What happens when roots clog pipes?
The roots attack the joints where the lines are their weakest. Once they’re inside, they drink and drink until the roots clog up your pipes. Clogs and Backups – Oil, grease, and fats tend to build up inside your pipes, shrinking the area waste can flow through.
What is a bursting pipe?
Pipe bursting is where a new HDPE (high-density polyethylene) pipe is attached to a winch with a cone-shaped bursting head and pulled through the damaged line. The damaged pipe breaks apart as the new one takes its place.
Is pipelining a repair?
Pipelining can be considered replacement or repair depending on whether the whole pipe length will be lined or just a section. If only a section of pipe (a spot repair) is lined, it is considered a repair. If you line the whole pipe from start to finish, it is basically like getting a brand new pipe installed (aka replacement). 3.
Can a sewer pipe be trenchless?
Sometimes, a drain pipe is so severely damaged that no trenchless method is viable. Plumbers cannot use trenchless technology on pipes that are back-pitched, which means that the original contractors failed to use the proper slope for your sewer line to your city connection. If the pipe has collapsed onto itself, you will also have to go this route.