Plumbing Diagnostic Questions

What is a plumbing diagnostic?

A plumbing diagnostic is a service visit where a licensed plumber comes out to inspect the issue, troubleshoot the problem, and explain what may be causing it. Diagnostics are helpful when the problem is not obvious or when there could be more than one possible cause.

Examples include leaks, clogs, low water pressure, no hot water, sewer smells, running toilets, unknown water damage, repeated plumbing issues, or fixtures that are not working correctly.

At Shanks Onsite Services, estimates are always free, diagnostic visits start at $69 and cover the time needed to troubleshoot, inspect, or narrow down the cause of a plumbing concern.

Why do I need a diagnostic instead of a free quote?

A free quote is usually for a visible installation or replacement where the scope is clear, such as replacing a toilet, installing a fixture, or quoting a larger planned plumbing project.

A diagnostic is different because the plumber has to investigate the problem. For example, a leak could be coming from a supply line, drain line, toilet seal, water heater, wall, ceiling, valve, or nearby fixture. Low water pressure could be caused by a fixture, pressure regulator valve, piping issue, leak, or water supply problem.

Diagnostics allow us to properly look over the issue, explain what is happening, and recommend the right repair instead of guessing.

What should I do before the plumber arrives?

Before the plumber arrives, clear access to the area if possible. Remove items from under sinks, around toilets, near the water heater, or wherever the plumbing issue is located. If there are pets in the home, it helps to have them secured during the visit.

It is also helpful to write down what you have noticed: when the problem started, whether it happens all the time or only sometimes, whether anything was recently repaired, and whether you have photos or videos of the issue.

If there is an active leak, shut off the water if you can safely do so. If you are not sure what to do, call or text us and we can help guide you.

Leak Questions

What should I do if I find a leak?

If you find a leak, the first step is to stop the water if you can safely do so. For fixture leaks, there may be a shutoff valve under the sink or behind the toilet. For bigger leaks, you may need to turn off the main water shutoff to the home.

After the water is controlled, avoid using the affected fixture until it can be checked. Take pictures or videos of the leak, especially if there is visible damage or if insurance may be involved.

Leaks can cause damage behind walls, under cabinets, beneath flooring, or in ceilings. Even a small leak can become a larger problem if ignored. If you are not sure where the water is coming from, a licensed plumber can inspect the area and help determine the cause.

How do I know if a leak is urgent?

A leak is usually urgent if water is actively spreading, dripping through a ceiling, coming from a water heater, affecting electrical areas, soaking flooring, or requiring you to shut off water to the home.

You should also treat it as urgent if you hear running water when everything is turned off, see water stains growing, notice a sudden increase in your water bill, or find moisture near walls, cabinets, or flooring.

If you can safely shut off the water, do that first. Then call or text Shanks Onsite Services with photos or videos so we can better understand the situation and let you know the soonest available appointment.

Why is there water around the base of my toilet?

Water around the base of a toilet may come from a failing wax ring, loose toilet, cracked toilet, leaking supply line, condensation, tank issue, or a problem with the flange. It is important not to ignore water at the base because it can damage flooring and subflooring over time.

If the toilet rocks or moves, that can also break the seal and lead to leaks. Sometimes the repair is simple, but in other cases the toilet may need to be pulled and reset, or the flange may need attention.

Avoid repeatedly using the toilet if water is leaking from the base, and have it checked before the damage spreads.

Toilet Questions

Why does my toilet keep running?

A running toilet is often caused by a worn flapper, fill valve issue, chain problem, flush valve issue, or water level that is set too high inside the tank.

Even though it may seem small, a running toilet can waste a lot of water and increase your water bill. Sometimes the repair is as simple as replacing internal tank parts, but if the toilet is older, cracked, unstable, or has repeated issues, replacement may make more sense.

If your toilet keeps running, refilling on its own, making noise, or not flushing properly, Shanks Onsite Services can inspect it and explain whether repair or replacement is the better option.

Why does my toilet keep clogging?

A toilet that keeps clogging may have too much toilet paper, non-flushable items, wipes, a weak flush, mineral buildup, an issue inside the toilet trap, or a blockage farther down the drain line.

If it happens once, it may be a simple clog. If it keeps happening, there may be a bigger issue that needs to be checked. Older toilets, low-performing toilets, or toilets with internal buildup can also clog more often.

Avoid using chemical drain cleaners in toilets. If the clog is recurring, a plumber can help determine whether the issue is with the toilet itself or the drain line.

When should I replace my toilet instead of repairing it?

A toilet may be worth replacing if it clogs often, rocks at the base, has cracks, leaks, weak flushing, damaged internal parts, or repeated repair needs. Replacement may also make sense if the toilet is older, inefficient, uncomfortable, or not performing well.

Repairs can be a good option for simple parts like flappers, fill valves, handles, or supply lines. But if the toilet has multiple problems or keeps causing trouble, a new toilet can save frustration and improve reliability.

A new toilet can also offer better flushing performance, comfort height options, water efficiency, and a cleaner updated look.

Drain and Clog Questions

Why does my drain keep clogging?

A drain that keeps clogging may have buildup inside the pipe, a blockage farther down the line, improper slope, old piping, roots, grease buildup, wipes, hair, soap scum, or other debris.

If the same drain keeps backing up, it may not be a simple surface clog. Chemical drain cleaners can sometimes make things worse or damage certain types of pipes.

A licensed plumber can help determine whether the clog is near the fixture or deeper in the drain system. If clogs are recurring, it is better to find the cause instead of repeatedly clearing the same blockage.

Are “flushable” wipes really safe to flush?

Even if the package says flushable, wipes can still cause plumbing problems. They do not break down the same way toilet paper does and can collect inside pipes, especially in older plumbing systems or septic systems.

Over time, wipes can contribute to clogs, backups, and sewer line issues. They can also combine with grease, hair, and other debris to create larger blockages.

The safest option is to only flush toilet paper and human waste. Wipes, paper towels, feminine products, cotton swabs, dental floss, and other items should go in the trash.

What should I avoid putting down my drains?

Avoid putting grease, oil, coffee grounds, wipes, paper towels, feminine products, dental floss, eggshells, paint, chemicals, and food scraps down your drains. Even small amounts can build up over time and lead to clogs or plumbing problems.

Kitchen drains are especially prone to grease buildup. Grease may go down as a liquid, but it can cool and harden inside the pipe. Bathroom drains often collect hair, soap scum, toothpaste, and other buildup.

A little prevention can save you from a bigger plumbing issue later.

Water Heater Questions

How do I know if my water heater needs to be replaced?

Signs your water heater may need replacement include no hot water, rusty water, leaking around the tank, popping or rumbling sounds, inconsistent hot water, visible corrosion, or repeated repairs.

Many traditional tank water heaters last around 8–12 years, depending on maintenance, water quality, installation, and usage. Age alone does not always mean it has to be replaced, but older water heaters are more likely to develop problems.

If your water heater is leaking from the tank itself, replacement is usually needed. If the issue is with a valve, connection, or part, repair may be possible. A licensed plumber can inspect the unit and explain your options.

What should I do if my water heater is leaking?

If your water heater is leaking, do not ignore it. Try to determine where the water is coming from, but do not take anything apart unless you know what you are doing.

If the leak is active or getting worse, turn off the water supply to the water heater if you can safely access the shutoff valve. For gas water heaters, do not touch gas controls if you are unsure.

A leaking water heater can cause damage quickly, especially if it is in a closet, attic, garage, basement, or finished area. Call a licensed plumber to inspect it and determine whether it can be repaired or needs replacement.

Why am I running out of hot water so fast?

Running out of hot water quickly may be caused by sediment buildup, a failing heating element, thermostat issue, undersized water heater, dip tube problem, heavy household usage, or an aging unit.

If your hot water used to last longer and suddenly does not, something may be wrong. If it has always run out quickly, the water heater may not be sized well for your household’s needs.

A plumber can check the water heater, look at the age and condition, and help determine whether repair, maintenance, or replacement is the better option.

Faucet, Fixture, and Pressure Questions

Why does my faucet drip after I turn it off?

A dripping faucet is often caused by worn internal parts such as a cartridge, washer, seat, or seal. Over time, these parts wear down and allow water to continue dripping after the faucet is turned off.

A small drip may not seem urgent, but it can waste water and may get worse over time. It can also leave stains, mineral buildup, or damage around the fixture.

Depending on the age and condition of the faucet, repair may be possible. If the faucet is older, damaged, corroded, or difficult to repair, replacement may be the better option.

Why is my water pressure low?

Low water pressure can be caused by something simple, like a clogged faucet aerator or shower head, or something more serious, like a failing pressure regulator valve, hidden leak, old piping, or an issue with the main water supply.

A good place to start is noticing whether the low pressure is happening at one fixture or throughout the whole house. If it is only one faucet or shower, the issue may be with that fixture. If the whole house has low pressure, it may need a closer look.

You should also pay attention to sudden pressure changes, banging pipes, water discoloration, or a higher water bill, because those can point to a bigger plumbing issue.

Shanks Onsite Services can test your home’s water pressure, check common problem areas, and help you understand whether it is a simple fix or something that needs repair.

What is a pressure regulator valve?

A pressure regulator valve, often called a PRV, helps control the water pressure coming into your home. If the pressure is too high, it can put extra stress on plumbing fixtures, pipes, water heaters, toilets, and appliances.

Signs of a possible PRV issue may include high or low water pressure, pressure that changes throughout the day, banging pipes, leaking fixtures, running toilets, or premature wear on plumbing parts.

A licensed plumber can test the water pressure and determine whether the pressure regulator valve may need adjustment, repair, or replacement.

Gas, Water Lines, and Larger Projects

Do you work on gas lines?

Yes, Shanks Onsite Services can help with certain gas line services. Gas work should always be handled carefully and by a qualified professional because improper gas connections can be dangerous.

If you smell gas, leave the area and contact your gas provider or emergency services right away. Do not try to diagnose or repair a suspected gas leak yourself.

For planned gas line work, appliance connections, or gas-related plumbing questions, call or text us with the details so we can let you know the best next step.

Do you provide plumbing estimates for remodels or larger installations?

Yes, we can provide estimates for larger plumbing installation projects such as water lines, gas lines, laundry plumbing, utility sinks, fixture installations, remodel plumbing, and other planned plumbing work.

For larger projects, photos, measurements, and a clear description of what you want done are helpful. In some cases, an in-person visit may be needed to look at the existing plumbing and provide a clear quote.

Repair diagnostics are different from planned installation estimates and may require our diagnostic fee if troubleshooting is needed.

Do you provide plumbing inspections for real estate?

We can provide plumbing-focused evaluations for real estate situations, but we are not a certified home inspection company. Tommy is a licensed master plumber, so our focus is on plumbing systems, visible plumbing concerns, water heaters, fixtures, leaks, pressure issues, and related plumbing items.

This can be helpful for buyers, sellers, agents, or homeowners who want a licensed plumber’s opinion on plumbing concerns found during a home inspection.

If you need a full home inspection, you should contact a certified home inspector. If you need a licensed plumber to look closer at plumbing concerns, Shanks Onsite Services can help.

Pricing and Payment Questions

How much does plumbing service cost?

Plumbing cost depends on the type of issue, the parts needed, the condition of the existing plumbing, access to the work area, and how much troubleshooting is required.

Some jobs are simple repairs, while others involve diagnosis, replacement parts, code considerations, or additional work to make the repair safe and reliable. That is why many plumbing problems need to be looked at before an accurate price can be given.

Shanks Onsite Services focuses on clear communication, honest options, and quality work. We want homeowners to understand what is being repaired and why.

Do you warranty your work?

Warranty details can depend on the type of work performed, the materials used, whether parts are customer-supplied or contractor-supplied, and the condition of the existing plumbing.

When we provide an estimate or complete a repair, we can explain what warranty applies to that specific job. In general, we want the work to be done right, checked before we leave, and clearly explained to the customer.

If you have a question about warranty coverage for a specific repair or installation, please ask before the work is completed so expectations are clear.

Do you charge a service call or diagnostic fee?

Yes. For plumbing problems that require troubleshooting, inspection, or diagnosis, our diagnostic fee starts at $69 and cover the time needed to troubleshoot, inspect, or narrow down the cause of a plumbing concern. If the repair is straightforward and completed during the same visit, the diagnostic fee may be applied toward the repair when possible. 

This helps cover the time to send a licensed plumber to your home, inspect the issue, determine the likely cause, and explain your options.

Free estimates may be available for certain planned installation projects where the scope is clear and no troubleshooting is needed.