Why Most Shower Filters Make Things Worse (And How ITPC Fixed It)

You bought a shower filter to protect yourself. But what if it's adding toxins instead of removing them?

Most people don't know this — but the majority of shower filters on the market use plastic-based cartridges. When hot water passes through plastic, it releases the very chemicals you're trying to avoid.

The Dirty Secret of Plastic Cartridges

Here's what happens inside a typical shower filter:

• Hot water (100-110°F) enters the filter housing
• Water passes through a plastic cartridge
• Heat causes the plastic to leach chemicals and shed microplastic particles
• "Filtered" water now contains BPA, phthalates, plasticizers, and microplastics
• You absorb these through your skin

A study published in Environmental Science & Technology found that heated plastics release significantly more chemicals than plastics at room temperature. The hotter the water, the worse the leaching.

You end up worse off than if you had no filter at all.

What's Actually in Plastic Filter Cartridges?

Most budget shower filters use cartridges made from:

• Polypropylene (PP)
• Polyethylene (PE)
• ABS plastic
• Other polymer blends

These materials can release:

• Microplastics — tiny plastic particles that enter your water stream
• BPA and BPS — hormone-disrupting chemicals
• Phthalates — linked to reproductive issues and cancer
• Plasticizers — chemicals that make plastic flexible
• Wax residues — from the manufacturing process

The industry doesn't talk about this. Most consumers assume "filter" means "clean." It doesn't — not if the filter itself is contaminated.

The Carbon Block Difference

Activated carbon filtration has been the gold standard in water treatment for over a century. Municipal water plants use it. Medical facilities use it. NASA uses it on the International Space Station.

Here's why carbon block works:

• Porous structure — millions of tiny pores trap contaminants
• Adsorption — chemicals bond to the carbon surface
• Particle capture — blocks microplastics down to 5 microns
• No leaching — carbon doesn't release chemicals when heated
• Stable at all temperatures — works in hot shower water without degrading

A study in the Journal of Water and Health confirmed that activated carbon effectively removes microplastics, chlorine, VOCs, and other organic compounds from water.

Why Most Companies Don't Use Carbon Block

Simple: cost.

Plastic cartridges are cheap to manufacture. Carbon block is more expensive. Most companies prioritize profit margins over your health.

They know consumers will see "shower filter" and assume it works. They don't expect you to research what's inside the cartridge.

What We Built at ITPC

When we started Innovative Technology Products Corp. in 2017, we refused to take shortcuts.

Our team of engineers and scientists spent months developing a shower filter with no plastic in the filtration path. We use a 12-layer coconut shell activated carbon block — the same technology trusted by water treatment facilities worldwide.

The result:

• Captures microplastics down to 5 microns
• Removes chlorine, chloramines, VOCs, and heavy metals
• Zero plastic shedding
• Stable at all shower temperatures
• 12,000 gallon lifespan (about 6 months)

We're the only company using coconut shell carbon block filtration at this price point. Not because we're smarter — but because we're not willing to compromise on your health.

If you've been using a plastic-cartridge filter, you may want to reconsider. The filter you trust might be the problem.

Learn more at itpcinc.com

References

Yang CZ, et al. "Most Plastic Products Release Estrogenic Chemicals." Environmental Health Perspectives, 2011.

Hussain N, et al. "Microplastics Released from Food Containers During Microwave Heating." Environmental Science & Technology, 2023.

Devi P, et al. "Activated carbon for water purification: A comprehensive review." Journal of Water and Health, 2020.

Pivokonsky M, et al. "Occurrence of microplastics in raw and treated drinking water." Water Research, 2018.