IRON Out Systems

A sudden loss of flow after installation can occur when a large amount of iron, rust, sediment, or loose particulate is pushed into the cartridge during initial startup.

Opening the main water supply too quickly can create a high initial flow through a new cartridge. If the source water contains heavy iron or sediment, these particles may accumulate rapidly on the filter media and create a noticeable pressure drop.

What should I check first?

1. Confirm that the main water supply is fully open.
2. Check the incoming and outgoing pressure readings, if gauges are installed.
3. Verify that the cartridge is installed in the correct flow direction.
4. Check whether a sediment filter is installed before the iron cartridge.
5. Inspect the iron cartridge for heavy rust or sediment accumulation.

How should I restart the system after servicing?

Open the incoming water valve slowly and allow the housings to fill gradually. Once the system is full and air has been released, slowly increase the water flow.

Some serviceable iron cartridges may benefit from rinsing or reverse flushing when loose iron particles or sediment have accumulated. However, the cartridge construction must allow this type of maintenance.

General flushing procedure

1. Shut off the incoming water supply.
2. Release all pressure from the filtration system.
3. Remove the cartridge carefully.
4. Inspect the cartridge for physical damage or media loss.
5. If the cartridge is designed for rinsing, flush it gently with clean water in the reverse direction of normal service flow.
6. Continue rinsing until heavy rust or loose particles stop discharging.
7. Reinstall the cartridge and slowly restart the system.

Reduced flow normally indicates increased resistance somewhere in the filtration system.

Common causes include:

• Heavy iron loading
• Rust or sediment buildup
• A clogged sediment prefilter
• A saturated iron cartridge
• Fine iron particles blocking an internal screen or distributor
• Insufficient incoming water pressure
• Excessive household flow demand
• Incorrect cartridge size for the application

What should I do?

Check each filtration stage separately. If removing or replacing the sediment cartridge restores pressure, the sediment stage may be clogged. If the pressure problem remains only when the iron cartridge is installed, the iron cartridge should be inspected or replaced.

Some pressure difference between the inlet and outlet sides of a filtration system is normal while water is flowing.

Every cartridge creates resistance as water passes through the filter media. Iron cartridges can create more resistance as iron and sediment accumulate.

What does a large pressure difference mean?

A growing pressure difference between the two gauges may indicate that one or more cartridges are becoming clogged.

For example:

• Normal inlet pressure + low outlet pressure = possible filter restriction.
• Low inlet and low outlet pressure = possible source-pressure problem.
• Good static pressure but poor pressure during water use = possible flow or pump-capacity issue.

A very low outlet reading while water is being used may indicate that the system cannot supply the requested flow through the cartridges.

Possible causes include:

• Low incoming pressure
• A clogged sediment cartridge
• A heavily loaded iron cartridge
• Insufficient well-pump flow
• Excessive household water demand
• Incorrectly sized plumbing

How should I diagnose the problem?

1. Record the inlet pressure with no water running.
2. Record the inlet pressure while a faucet is running.
3. Record the outlet pressure at the same time.
4. Compare the readings.
5. Inspect or replace clogged cartridges before changing the system configuration.

Iron filter life cannot be accurately determined by time alone. Cartridge life depends heavily on the amount of iron entering the system and the total number of gallons treated.

Replace the cartridge when you notice:

• Iron staining beginning to return
• Increasing pressure loss
• Reduced household water flow
• Heavy rust or iron accumulation
• The cartridge no longer reduces the measured iron concentration adequately

Yes, when the source water contains sand, rust, silt, or other suspended particles, a sediment prefilter can help protect the iron cartridge and extend its service life.

A sediment filter captures physical particles before they reach the iron media, allowing the iron cartridge to focus more effectively on its intended treatment function.

Cartridge-based iron filters are convenient for lower iron loading and smaller treatment requirements. As the iron concentration increases, cartridges may become exhausted or clogged more quickly.

Automatic systems provide a larger media bed and periodically backwash accumulated iron, which can make them better suited for higher iron loading and whole-house applications.

For iron concentrations above approximately 5 PPM, contact Max Water with your complete laboratory water analysis before selecting a system.

Iron treatment should be selected based on actual water chemistry rather than staining alone.

For well water, we recommend testing at least:

• Iron
• Manganese
• Hydrogen sulfide / sulfur odor
• pH
• Hardness
• TDS
• Alkalinity
• Sediment or turbidity
• Bacteria, when applicable

Different iron types and water conditions may require different treatment methods.

Continued staining does not always mean the filter is defective.

Possible reasons include:

• The incoming iron concentration exceeds the cartridge capacity.
• The cartridge is already exhausted.
• The water contains manganese or another staining contaminant.
• The water chemistry is outside the filter's recommended operating range.
• Old iron deposits remain inside plumbing, fixtures, or the water heater.
• The household flow rate is too high for the cartridge.

Test both the untreated and treated water to determine how much iron is actually being reduced.

No. A dedicated iron filter is not designed to substantially reduce Total Dissolved Solids (TDS), and most iron-filter cartridges do not function as complete water softeners.

If the water also has high hardness, calcium, or magnesium, a separate water softener or appropriate scale-treatment system may be required.

Do not remove filter media, modify internal screens, enlarge openings, or permanently alter the cartridge unless specifically instructed by Max Water technical support.

Changing the amount of media or internal cartridge construction can alter contact time, filtration performance, pressure drop, and contaminant capacity.

Contact us before replacing or modifying the system when you experience:

• Severe pressure loss immediately after installation
• Repeated cartridge clogging
• Iron staining returning unusually quickly
• Iron levels above approximately 3 PPM
• Rotten-egg odor or suspected hydrogen sulfide
• High manganese levels
• Unknown well-water chemistry
• Pressure below the recommended operating range

When contacting us, please provide your order number, system model, incoming water pressure, water-test results, and photos of the installation. This allows us to provide more accurate troubleshooting advice.