Porta-Pak Holding Tank Deodorizer
The Industry’s #1 Selling Drop-In Holding Tank Deodorizer
PORTA-PAK is the trusted, industry-leading drop-in holding tank deodorizer designed specifically for portable sanitation operators. Engineered for dependable, week-long odor control in all climates and conditions, it delivers consistent performance in portable toilets and restroom trailers with unmatched convenience.
Powered by Walex WAVE2® odor control technology, PORTA-PAK provides commercial-strength odor prevention in a pre-measured, water-soluble packet. Just drop a single Porta-Pak into the holding tank, add water, and put the unit into service—no measuring, no spills, no mess.
How to Use
Add one (1) PORTA-PAK 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.
What Is PORTA-PAK Used For?
PORTA-PAK is a commercial holding tank deodorizer used to control odors and treat waste in portable toilets and restroom trailers. It is designed for portable sanitation operators who need reliable, week-long odor control across high-traffic routes and varying weather conditions.
As a professional-grade blue deodorizer and holding tank treatment, PORTA-PAK helps maintain odor-free units, supports cleaner sensors, and delivers consistent performance from service to service.
How Does PORTA-PAK Work?
PORTA-PAK utilizes Walex’s proprietary WAVE2® odor control technology to deliver long-term odor prevention in portable restroom holding tanks. Once placed in the tank and combined with water, the commercial-strength, water-soluble packet dissolves quickly and disperses evenly in the tank.
The formula contains active ingredients engineered to rapidly break down paper and waste while controlling odor-causing bacteria. Its non-staining DURABLUE color enhances tank appearance without leaving residue.
Key Features & Benefits
Industry’s #1 Selling Drop-In – Proven performance trusted by portable sanitation professionals.
Week-Long Odor Control – Reliable deodorizing power for high-traffic units and demanding routes.
Non-Staining DURABLUE Color – Professional blue appearance without staining tank components.
Commercial-Strength Formula – Designed for portable toilet and restroom trailer applications.
Excellent for All Weather Conditions – Performs consistently in hot, cold, and moderate climates.
Formaldehyde-Free – Meets modern standards for professional sanitation chemistry.
Biodegradable – Designed for responsible waste treatment.
Water-Soluble Portion Control – Convenient drop-in packet eliminates measuring and overpouring.
Ideal For
Portable restroom operators
Restroom trailer servicing
Construction sites
Outdoor festivals and events
High-traffic portable toilet routes
All-weather service environments
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 Holding Tank Deodorizer
50 packets per bag, 250 packets per case
Drop 1 pak into tank or bucket THEN add five to seven gallons of fresh water
Sunglow, Lavender, Mint, Power Punch, Mulberry
