Porta-Pak MAX Holding Tank Deodorizer
Maximum Strength Odor Control for Extreme Conditions
PORTA-PAK MAX is the most powerful drop-in holding tank deodorizer in the Walex lineup, engineered for portable sanitation operators who need maximum performance in extreme heat, heavy traffic, and demanding service conditions. When standard treatments aren’t enough, Porta-Pak Max delivers unmatched odor control in a super-concentrated, easy-to-use packet.
Powered by Walex WAVE2® Technology, PORTA-PAK MAX provides enhanced deodorizing performance with 50% more color, 50% more odor control, and double the fragrance compared to original Porta-Pak. Designed for commercial routes and high-demand environments, it provides dependable, week-long odor control between service cycles.
How to Use
Add one (1) PORTA-PAK MAX packet into the portable restroom holding tank by flushing or direct addition.
Add five (5) to eight (8) gallons of fresh water to the tank.
Allow the packet to dissolve completely before placing the unit into service.
One packet controls odor and treats wastewater per application.
Download Technical Data Sheet
What Is PORTA-PAK MAX Used For?
PORTA-PAK MAX is a commercial holding tank deodorizer used to control odors in portable toilets and restroom trailers operating in extreme conditions. It is designed for portable sanitation operators servicing high-traffic routes, long service intervals, and hot climates where maximum-strength chemistry is required.
As a super-concentrated drop-in deodorizer, PORTA-PAK MAX helps maintain odor-free units and a professional appearance between service cycles, even in challenging environments.
How Does PORTA-PAK MAX Work?
PORTA-PAK MAX utilizes Walex’s proprietary WAVE2® Technology to deliver powerful, long-lasting odor control in portable restroom holding tanks. Once placed in the tank and combined with water, the water-soluble packet dissolves quickly and disperses evenly throughout the tank.
The advanced formula is engineered to suppress odor-causing bacteria and maintain a stable treatment environment—even in extreme heat and heavy-use conditions. Its non-staining DURABLUE color provides a clean, professional appearance without staining tank components.
Key Features & Benefits
- Strongest Formula Available – Maximum-strength drop-in for demanding service environments.
- 50% More Color – Enhanced DURABLUE appearance for a cleaner-looking tank.
- 50% More Odor Control – Increased deodorizing power for heavy-traffic units.
- Double the Fragrance – Stronger scent performance for long-lasting freshness.
- Week-Long Odor Control – Reliable performance between service cycles.
- Excellent for Extreme Weather – Designed for hot climates and harsh conditions.
- Commercial-Grade Performance – Built for professional portable sanitation routes.
- Non-Staining DURABLUE Color – Provides professional presentation without staining.
- Water-Soluble Portion Control – Convenient drop-in packet eliminates measuring.
- Formaldehyde-Free & Biodegradable – Meets modern sanitation standards.
Ideal For
- Portable restroom operators servicing high-traffic routes
- Hot climate service regions
- Large outdoor events and festivals
- Construction and industrial job sites
- Long service intervals requiring maximum-strength deodorizing power
- Operators who need the strongest drop-in chemistry available
Frequently Asked Questions
The most common reason your deodorizer isn’t performing as well is inadequate water, which leads to mounding. We recommend adding 5-8 gallons of water to ensure all waste and paper falls below the water line. Water is the vehicle that delivers the deodorizer to the waste.
Urine changes the pH of the contents of your holding tank, which causes the dye to fade from dark blue to green. Heavy usage and hot weather makes this problem worse. When your customers see the green color, they believe the deodorizer has worn off, even though that’s not necessarily true. Walex recently created a new dye called DuraBlue, which better withstands these shifts in pH. DuraBlue retains its deep blue color through day seven. Like other Walex dye, it won’t stain or cause problems at waste treatment plants. Durablue is available in all Walex packets and liquids.
It’s a matter of personal preference because there are pros and cons to each. Packets are easy to use because they’re mess-free and pre-portioned. Walex liquids are versatile because they’re available in more strengths and fragrances. Which product is more cost-effective also depends on usage. To learn more about which deodorizer best fits your needs, read our article about selecting a deodorizer.
Every time you empty the unit, a little bit of residual waste can remain on the tank walls. If you don’t scrub off this “sludge line,” over time, the waste will become caked to the tank walls and be very hard to remove. Walex makes a product called Commando that deep cleans these troublesome units. To use Commando, drop one packet in per 100 gallons of tank capacity and add enough water to fill the tank completely. The enzymes target and liquefy any solids so when you empty the tank 12 to 24 hours later, it’s good as new.
Walex offers a wide variety of fragrances, so it’s a matter of personal preference. We do recommend switching fragrances every few months because your brain can acclimate to smells. If you’re interested in trying different fragrances, call your account manager and ask for samples.
No, you can add the packet or liquid directly into the holding tank. We recommend adding deodorizer before water so everything is better mixed together.
Many drivers who use regular Porta-Pak add two packs if extra odor control is needed. However, we recommend switching to Porta-Pak MAX, which is a more powerful packet designed for extreme conditions. Porta-Pak MAX is a super-concentrated formula with 50% more color, 50% more odor control, and double the fragrance of original Porta-Pak.
Yes. Standards for accepted waste at treatment plants vary across the country, but we are not aware of any waste treatment plant that does not accept waste treated by Walex products. If you encounter any issues from waste treatment plants, please contact us.
Yes. To offer a premium restroom trailer rental, we recommend ingesting in P-Trapper Waterless Urinal Odor Control, Commando Holding Tank Cleaner, and Ovation Air Freshener, if you don’t already have these products. For a full list of products to keep your restroom trailer fresh and clean, read our blog.
Products Trusted by Industry Leaders
“From the very beginning, Walex has played a key role in helping us deliver on our mission to provide clean, dependable, and high-quality sanitation services across Southern California. Their innovative products and reliability have supported our teams in the field, allowing us to meet the high standards of service our customers count on. Whether it’s the consistency and effectiveness of their deodorizing products or their dependable staff, Walex has helped us do our job better—day in and day out.”
— Rudy Lopez, Chief Executive Officer, Southern California Industries
“Walex’s customer service is next level. Their products are always shipped in a timely manner, same day if not the next, and are on time. The staff has always made us feel we are family to them. Can’t say enough good things about Walex as a company!”
— Hunter Schenk, Tuff Jon
“The experience I’ve had as it relates to Walex has been nothing less than amazing. I am truly appreciative of everything you all do to ensure ROS stays ahead of the curve on providing top tier service.”
— Anthony Sims, United Rentals
“Walex is a very special company with an owner and team members who strive for the best products and services, showing they care, have integrity, and want to help raise the bar in our industry and help their customers. We feel like family.”
— Andy Gump Family & Team
“Working with Walex has been a real win for our business. They’re quick to respond to orders, always deliver on time, and help us keep things running smoothly—especially during our busiest seasons. Their communication is clear and consistent, so we’re never left guessing about where things stand. It’s great to have a supplier that understands the pace and demands of the porta john business. Walex has become a trusted partner.”
— Kellie Sicilian, Procurement Specialist, MPW Services
“We’ve used Walex for more than a decade and find it to be the most consistent and reliable vendor we’ve had. When you order from the outstanding sales group you know you’re getting industry best performance. Walex has been a true value to our business and customers.”
— Brian Knoper, Owner, Kerkstra Portable Restrooms
About Porta-Pak MAX Holding Tank Deodorizer
50 packets per bag, 250 per case
Add one (1) PORTA-PAK MAX packet into the portable restroom holding tank by flushing or direct addition.
Add five (5) to eight (8) gallons of fresh water to the tank.
Allow the packet to dissolve completely before placing the unit into service.
One packet controls odor and treats wastewater per application.
Mint, Sunglow, Power Punch, Lavender
