How to Test for Corrosion in Your Plumbing System

A properly maintained plumbing system is a home’s lifeline, providing clean and safe water on demand. However, when hidden corrosion starts eating away at pipes, serious problems can arise.

Unchecked corrosion can threaten your home’s plumbing with major leaks, clogs, reduced water pressure, and even lead and other metal contamination of your drinking water. However, by being proactive and learning to spot early signs of corrosion build-up, you can detect issues before they cause expensive damage.

This comprehensive guide will walk you through simple DIY methods for inspecting your plumbing for corrosion. You’ll learn to monitor water quality, visually examine pipes and fixtures, and use a multimeter to check for corrosive ions. We’ll also cover when it’s critical to call a professional plumber for a full corrosion assessment using pipe cameras and leak detection tools.

Arm yourself with the knowledge to keep your water flowing efficiently and your pipes in peak condition by stopping corrosion. Protect your home now and avoid headaches down the road.

Understanding Corrosion in Plumbing

Corrosion is the gradual wearing away of metal piping caused by a chemical reaction between the metal surface and water or environments.

Several factors can accelerate corrosion in plumbing systems, including the pH and mineral content of the water, oxygen levels, pipe materials and joining methods, and external environmental conditions like moisture and soil acidity.

Types of Corrosion in Plumbing Systems

Three main types of corrosion can negatively impact residential plumbing systems:

Galvanic Corrosion

This occurs when two dissimilar metals are joined in a plumbing system and react against each other. One metal will corrode faster than the other, such as copper pipes connected to iron fittings.

Pitting Corrosion

Over time, small holes and pits start forming on the metal surfaces of the pipes. This is often caused by aggressive water properties or the presence of bacteria.

Erosion Corrosion

The constant flow of water steadily erodes and wears away the inside lining of pipes. Harder water and higher flow rates accelerate erosion over time.

Catching and remediating any corrosion early is critical to avoiding major plumbing headaches like pipe bursts, water leaks, flooding, and potential contamination of drinking water from the corrosion of lead or copper pipes. Routine inspection and testing allow early detection and prevention of corrosion issues before they escalate.

Detecting Signs of Corrosion in Your Plumbing

Be on the lookout for these common indicators that may signal corrosion is occurring in your home’s plumbing system:

• Discoloured Water - Rusty, brownish, greenish or yellowish water from the taps may indicate corroded pipes and plumbing fixtures. Particles of corroded metal cause discolouration and an unpleasant metallic taste.
• Foul Odors— An odour of rotten eggs or sewage from the hot water taps can indicate corrosive bacteria build-up inside your water heater or pipes.
• Frequent Leakage - Corrosion damage and pinhole pipe leaks will cause visible water damage. Watch for damp spots on walls or ceilings, especially near joints and elbows.
• Dropping Water Pressure—Corrosion debris builds up inside supply pipes, restricting water flow and decreasing water pressure from faucets and shower heads.
• Clanging Noises - Loud banging or clanging noises from pipes point to advanced corrosion with thinning and structural weakness in pipes.
• Flaking Fixtures - Noticeable greenish or white crusty mineral deposits around faucet fixtures indicate corrosion is actively occurring.

With corrosion, the unseen damage happening inside pipes poses the greatest threat. As corrosion perforates supply pipes, it allows heavy metals like lead and copper to leach into drinking water, creating a major health hazard. Stay vigilant in monitoring your plumbing for any signs.

DIY Methods for Testing Your Plumbing for Corrosion

Use these DIY techniques to inspect your plumbing system for early signs of corrosion periodically:

Method 1: Water Quality Testing

You can test your water supply for several factors that accelerate corrosion in plumbing. First, check the pH level using litmus strips.

A pH below 6 indicates acidic water, which increases corrosion risk. Next, test for total mineral content, as hard water with high concentrations of minerals can coat pipes and restrict flow over time.

Finally, check for contaminants like iron, chlorine, and sulphur, which are corrosive substances. Performing these water quality tests periodically allows you to monitor for conditions ripe for corrosion.

Method 2: Visual Inspection

When performing a visual inspection, thoroughly examine all visible pipes, joints, fittings, and fixtures. Carefully examine the pipes for any signs of rust spots, pitting, leaks, dampness, or mineral deposits that could indicate corrosion.

Also, scrutinise all connectors, elbows, and joints closely for any corrosion build-up. Finally, check faucets and valves closely for a noticeable greenish crusty build-up, which points to active corrosion. A careful visual inspection can help catch early signs of corrosion.

Method 3: Multimeter Conductivity Test

You can use a multimeter to measure the electrical conductivity of tap water samples. Higher conductivity readings indicate that more corrosive ions are present in the water. Take conductivity measurements over time and compare the results.

Any measurement increase may point to advancing corrosion in the plumbing system. Monitoring conductivity changes allows early detection.

Method 4: Infrared Camera Inspection

Another useful inspection method is using an infrared camera. Aim the camera at pipes to identify any cold spots that may indicate underlying corrosion issues. The camera can also check for temperature differences along the pipes, especially under insulation.

Areas with uneven heating patterns or unexpected temperature variations can signify problem spots where corrosion develops. Infrared imaging serves as an excellent tool for early detection of corrosion.

Getting a Professional Corrosion Assessment

While DIY testing methods are helpful for preliminary checks, it’s wise to have a professional plumbing inspection done at least annually to evaluate your entire system thoroughly for hidden corrosion. Plumbers have access to advanced tools and techniques to identify issues you might miss on your own.

For example, plumbers can snake high-resolution pipe inspection cameras deep inside your pipes to visually examine areas for corrosion that can’t be seen externally.

Ultrasound testing is another method plumbers use to measure pipe wall thickness in key locations using soundwaves. This method detects thinning and holes caused by corrosion. Plumbers also perform isolated pressure testing by closing off sections of plumbing and pressurising them to check for leaks that would indicate corrosion damage.

A professional plumber can detect corrosion and advise on necessary repairs and preventative maintenance. Options like pipe flushing help remove mineral deposits and debris to improve water flow.

Installing an anode rod provides a sacrificial metal that absorbs corrosion instead of your pipes. Water softeners and filtration systems control water chemistry to be less corrosive. Protective epoxy coatings can be applied inside pipes as a barrier from corrosion.

With regular professional corrosion assessments and following the plumber’s recommended prevention practices, you can keep your plumbing system free of hidden damage and running safely and efficiently.

Protect Your Plumbing from Corrosion Damage

Catching early corrosion is critical to avoiding major plumbing headaches like leaks, floods, and contamination of drinking water. Use this guide to monitor your system for warning signs and take prompt action if corrosion is detected. Perform routine DIY tests and contact a licensed plumber annually for a professional corrosion assessment.

The plumbing experts at WP Plumbing in Melbourne have extensive experience inspecting and repairing corrosion damage. Contact our professional team today to evaluate your plumbing system’s health and pipe corrosion risks. We offer affordable camera inspections, leak detection, repairs, and preventative maintenance to keep your pipes corrosion-free.

Protect your home, health, and water supply by prioritising corrosion prevention. WP Plumbing has the tools and know-how to detect issues before they cause expensive emergencies. Contact us today to schedule your plumbing corrosion inspection and keep your water flowing safely.