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 Main Water Line Repair & Replacement
Water Service- Portland Oregon- Tualatin Valley Plumbing
Tualatin Valley Plumbing offers main water line repair and replacement in Portland, & surrounding communities.

Think about how many times a day you use water in your house. When you wash your hands, pour a cup of coffee, or run your dishwasher, you probably are not thinking about how the water gets from the street to your faucet. You have more important things to worry about. Someday, though, your home’s main water service line will need to be repaired or replaced. We know that having a plumbing problem is the last thing you want to deal with, but you’ll have less of a headache if you know what to expect.


It helps to know what exactly we are talking about when we refer to your home’s main water service line. Whether you are on a well or city water, there is a main line connecting your water supply to your house. If you have a well, you are using groundwater that is being pumped from aquifers deep in the ground to the surface. If your water comes from a public water utility, that water has been mostly collected from surface water. Water is treated before being sent to your house, which makes it potable, meaning it is safe to drink, use for food preparation, and bathing. Your main water line is buried underground and is only used for carrying potable water to your house. Water and sewage being taken from your house goes through a different line, called a sewage pipe.

Signs You Need Water Line Repair or Replacement

There are multiple factors that can contribute to a failing water service line. One of the most obvious causes of problems is weather. Although water service lines can break any time of year, they commonly have problems during periods of extreme temperatures when pipes expand and contract. The pipe’s material has a lot to do with how well it fares during drastic temperature changes. Older pipes are made out of materials such as iron that are less forgiving than the PEX piping being used today. One of the advantages of PEX is that it can freeze without cracking and breaking. Older pipes are also susceptible to corrosion, both inside and out.

Natural environmental causes include soil erosion, ground shifting, and tree roots. When planting trees, it is a good idea to consider where your main water service line is located and take that into consideration. Try to avoid planting over or near your water line.

Human error is another cause of broken water lines. It is always important to know where your utilities are located before you start any excavation projects, no matter how big or how small. You should always call 8-1-1 before you dig, to avoid accidents such as severing your water line with a shovel.

What Are The Signs That I Need A Water Line Repair Or Replacement?

Knowing what to watch out for can save you the time and stress of trying to figure out the cause of your home’s plumbing issues. Some signs are more obvious than others and could have more than one cause. These are some of the most common signs that your water service line needs to be repaired or replaced:

Soggy patches or water pooling in your yard. This could indicate a leak in either your water service line or your sewer line. Your nose may be able to tell the difference. Either way, you need to call a plumber to fix the leak.

Rumbling sounds and other noises. These will likely be more noticeable at night or during quiet times of the day. A leak can cause vibration in the pipes, leading to strange new water sounds. This is often the first indication there is a problem.

A drop in water pressure. A sudden drop in water pressure usually indicates a leak. It could also mean that mineral deposits are restricting water flow. A plumber will be able to determine the exact cause of your low water pressure.

Discolored water.  Rust colored water means there is rust somewhere in your home’s plumbing system. It may be coming from the water heater, a pipe in the house, or the main water service line. A plumber will be able to do an inspection of your home’s plumbing and diagnose any problems. Besides replacing your home’s water service line, your plumber may also suggest repiping your home, especially if your home has galvanized pipes. 

A higher-than-usual water bill. Sometimes your first clue that you have a plumbing problem is a higher water bill than what you’re used to seeing. If your water usage habits haven’t changed but your bill has, you should investigate.

How can I determine if I have a leak and where it is located?

Several plumbing issues can cause the symptoms listed above. You’ll need to isolate the source of your problems. A plumber can help you do this, but there are things you can do to check for yourself.

Pooling Water or Squishy Ground

If water is pooling in your yard, and you don’t smell sewer gas, there are two possible causes. You have a leak in either the main water service line or in your irrigation system. Of course, if you do not have an irrigation system, the answer is clear. If you do though, you will need to determine which system has the leak so you will know whether to call a plumber or an irrigation professional.


Water Meter

In the absence of an obvious location, check your water meter. Water meters are usually located near the curb in front of your house. It will likely be housed in a box with a cast iron, concrete, or plastic lid. Be careful opening the box. Lids can be heavy and sharp. Wearing gloves is a good idea. Use a tool such as a screw driver to help pry up the lid. If the gauge has a cap, flip it up and look for an indicator such as a red triangle. If there is not an indicator, note the location of the needle. Make sure all the water in the house is turned off, including dishwashers and washing machines. Now look at the indicator. Is it moving? A rapidly spinning indicator means there is a fast leak. If it is spinning slowly, there is a slow leak. If using the needle as a reference, leave the water off for thirty minutes to an hour. Look to see if the needle has moved from its original location. If it has, there is a leak.


Search Around Your House

It is possible that the leak is not in the main water line. It may be inside your house. Think of every place in your house that uses water and look there for leaks or drips. Toilets, faucets, and underneath sinks are good place to start. Also, look around your dishwasher, washing machine, and behind your refrigerator if you have an ice maker line. Check around the base of your water heater and examine all fittings and connections for moisture. Next, examine the walls and ceiling. Are there any signs of water damage such as stains or mold? Don’t forget to also check outside for a leaking hose bibb.


If you still have not found the source of the leak, we recommend calling a leak detection company. Then your plumber can get to work making all the necessary repairs.

Main Water Line Repair Vs. Replacement — How to Know What’s Best

When you have a damaged main water line, you’re probably wondering if you can get by with a repair or if you’ll have to spring for a replacement. Most would choose to repair it because of how expensive it can be to install a new line. So, how do you know which way to go?

Here are four factors that will dictate whether you can repair your main water line or if replacing it is the best option.

The Material
Most water lines are made from three primary materials: copper, steel, and ductile iron. In the past, lead and galvanized pipes may have been used as well. If the line is made from lead, cast iron or galvanized metal, replacement is the only option.

The Age of the Water Line

The average lifespan of a main water line is about 50 years, so any line that’s over that isn’t a good candidate for repairs. Metal becomes brittle as it ages, so connecting a new piece of pipe to an aging one could be disastrous.

Prior Repairs

Another determining factor is whether you had any prior repairs to your main water line. Once an old water line has been worked on, it’s more prone to breaking again, which means replacing it is the better option. Also, repairing the water supply line on more than one occasion is almost always more expensive than putting in a new one.


Lastly, the cost is a significant factor in determining whether to repair or replace your main water line. As a general rule of thumb, if the cost to repair the line is at least 50% of installing a new one, a new main water line installation makes more economic sense. At Fitzgerald Plumbing, our experts will examine the state of your main water line and recommend the best option to solve your problem.

How will the main water line be replaced?

Replacing a main water line used to mean digging a trench through your yard and causing major disruption to your property’s landscaping. With directional boring, however, there is minimal digging and you will hardly be able to tell anything happened. TVP makes replacing a water service an easy process for homeowners.


First, a licensed plumber will evaluate your water service needs, and give you an upfront, flat rate price that includes the cost of permits, parts, labor, and warranty. Next, we have your property’s utility locations marked, purchase a plumbing permit, and schedule directional drilling. This trenchless technology allows us to run new PEX pipe underground from the water meter to your house. Some digging is needed near the meter box. If there are plants in the way, we will do our best to work around them or carefully remove them, but we cannot make any guarantees. We are experts when it comes to plumbing, but we are not landscapers.


The water line is replaced in less than a day. Then we schedule an inspection, usually for the next day. Once our work has passed inspection, we back-fill any holes and leave the area as clean and neat as we can.

Schedule fast & reliable Portland plumbing service with the highly trained specialists at Tualatin Valley Plumbing.
(503) 607-7242 or contact us online today to get started!

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