The Omnipure K5555-BB is a 10-inch inline DI filter designed to reduce total dissolved solids (TDS) and lower water conductivity. It is commonly used as a polishing filter in applications that require low-conductivity water, including drinking water systems, specialty equipment, laboratory-style applications, aquarium support systems, and other point-of-use applications where dissolved-ion reduction matters.
Model number: K5555-BB
Product name: Omnipure K5555-BB DI Inline Filter
UPC: 756806487377
Media type: DI media for TDS reduction and conductivity reduction
Flow rate: 0.5 GPM
Cartridge size: 10-inch x 2.5-inch inline filter
Port size: 1/4 inch female pipe thread
Country of origin: Made in the U.S.A.
Case quantity: 25
What is the Omnipure K5555-BB DI Inline Filter Used For?
- TDS reduction in point-of-use water lines
- Lowering conductivity for specialty water applications
- Final polishing after reverse osmosis or other prefiltration
- Inline filtration where a compact, replaceable cartridge is preferred
- Systems that require 1/4 inch female pipe thread connections
Compatibility checks
Before ordering, confirm:
- Your current filter model or documentation matches K5555-BB
- Your system uses a 10 inch x 2 inch inline filter format
- Your connection type is 1/4 inch female pipe thread
- Your application is compatible with 0.5 GPM flow
- Your water has appropriate prefiltration if sediment, chlorine, or heavy contaminant loading is present
- Best used with reverse osmosis systems
For longer DI filter life, use this filter after reverse osmosis or other appropriate prefiltration. RO pretreatment reduces the dissolved ion load before water reaches the DI stage, helping the inline DI filter last longer and perform more consistently.
What’s included
- (1) Omnipure K5555-BB DI inline filter
Filters sold individually.
Install difficulty: Easy to moderate
Installation depends on your existing tubing and fittings, and whether adapters are needed for the 1/4-inch female pipe-thread ports.
Installation Guidance
- Shut off water to the system and relieve pressure.
- Confirm the flow direction and connection layout before removing the old filter.
- Disconnect the old inline filter.
- Install the new K5555-BB filter using compatible 1/4 inch male pipe thread fittings.
- Make sure connections are snug, aligned, and not overtightened.
- Turn water back on slowly and check for leaks.
- Flush the filter according to your system requirements before use.
- Recheck all fittings after a few minutes of operation.
Replacement Triggers
Replace the filter when:
- TDS readings after the filter begin to rise
- Conductivity readings increase above your target range
- Flow drops below expected performance
- The filter reaches its maximum one-year service life
- Your application requires a scheduled replacement for consistency
Maintenance Schedule
- Test TDS or conductivity regularly if low-TDS output is important
- Replace at least annually, or sooner if readings rise
- Maintain upstream sediment, carbon, or RO filtration to help protect DI performance
- Inspect fittings for leaks during each filter change
FAQs for the Omnipure K5555-BB DI Inline Filter
Q: What does the Omnipure K5555-BB filter do?
A: It reduces TDS and lowers conductivity in water, making it useful as a polishing filter in point-of-use and specialty applications.
Q: What port size does this filter use?
A: It uses 1/4 inch female pipe thread ports.
Q: What is the flow rate?
A: The listed flow rate is 0.5 GPM.
Q: How long does this filter last?
A: It has a maximum one-year service life, but actual life depends on incoming water quality, TDS level, usage, and whether RO is used before the DI filter.
Q: How do I know when to replace a DI inline filter?
A: Replace it when TDS or conductivity readings rise above your target level, flow drops, or the one-year service life is reached.
Q: Should this be installed before or after RO?
A: DI filters are often used after reverse osmosis as a final polishing stage because RO reduces the load on the DI media.
Q: Will this filter reduce chlorine taste and odor?
A: This filter is designed for TDS and conductivity reduction. Carbon filtration is typically used for chlorine taste and odor.
Q: Can I install this filter myself?
A: Many users can if they are comfortable with tubing and threaded fittings. Confirm the correct fitting type and check carefully for leaks after installation.
Match your inline filter model and 1/4-inch female pipe-thread connections, then replace it with the Omnipure K5555-BB to lower TDS and support consistent, low-conductivity water.
