Introducing the Sani Stand!

In addition to our Freshwater Sink, we are now excited to offer another free standing hand cleansing option, our NEW Sani Stand!   Our Sani Stand takes seconds to setup, is easy to relocate and has a heavy duty base that helps prevent tipping. Each mobile sanitizer station includes two hand sanitizer dispensers, and is delivered filled with hand… Read more »


10′ Containers and 40′ Container Office & Storage Combos added to our Fleet!

In addition to our 20′ and 40′ Storage Containers, Mobile Office Trailers and 20′ Ground Level Office Containers, Mr. John and Tri-Boro Trailer now offer 10′ Storage Containers and 40′ Container Office & Storage Combos!   10′ Storage Container Tri-Boro Trailer’s 8×10 storage containers are safe, convenient, and small enough to fit in a standard parking spot…. Read more »


Winter Is Around The Corner!

Winter can be unpredictable. Be prepared and cozy with our featured products providing maximum comfort and productivity for your people and materials!   8×32 Combo This mobile office and storage combo trailer includes a single office with one entry door and storage area with roll up garage door. Features for this unit include: standard furniture… Read more »


New Tri-Boro Trailer Site Has Arrived

Out With The Old and In With The New! Sorting through various products and pages can be overwhelming, so we wanted to make Tri-Boro Trailer’s website more efficient than ever. Our newly redesigned website has enhanced, user-friendly features giving site visitors ease when navigating through pages, printable PDF’s, guidelines, and much more. What Else Is… Read more »


The pieces of Mr. John

At Mr. John, we are passionate about our work and delivering reliable service to our customers each and every time.  Quality makes a difference and here is what separates us from the competition.


Oh, the places we’ll go!

Whether you have a job in Pittsburgh PA or Nashville TN, Mr. John is ready to handle all of your portable sanitation needs. Our portable toilets come in all shapes, sizes and varieties. We can add a sink, a sling or a heater to any portable toilet in our fleet. We have restrooms perfect for… Read more »


Planning Your Construction Site Portable Bathroom Rentals

A construction site requires a sanitation plan that is thorough and complete. Such a plan must meet the requirements of OSHA, including portable toilet trailers and a portable toilet with sink adequate to meet the needs of all workers and others accessing the site. The specific OSHA standards for the safety and health regulations for… Read more »