Holding Tanks

250-gallon rotationally molded polyethylene holding tank works well in many applications. It is most often used under on-site office trailers, but has also been used for temporary waste storage in other locations as well. The low profile tank has dimensions of 6’ x 3’ 11 ½” x 18”.

Water Supply Systems

If running water is not readily available, that can be a huge problem for you, but Barnhill’s team is ready and waiting with a solution! We offer 250 gallon holding tanks for temporary waste storage, or 250 gallon water supply systems that can easily hook up to your trailer that we gladly fill with fresh water weekly onsite.

This is great for agriculture, food and construction work sites. Our products are ideal for large gathering events or day to day work sites. Our trained service technicians can setup your unit to be serviced weekly, bi-weekly or even monthly.

For more information on the level of service you will need please contact a member of our customer service team at (803) 753 7077.


Here's the most convenient way yet to keep hands clean... even when water is not available! The SaniStand with Alcohol-Free Antiseptic Foam kills 99% of germs on hands, including E. coli and salmonella.



Teri Pahon - Owner of Portable Restroom Trailers

"Great Client care and service! You'll love working with Brandi and Hamp, they personally see to your event and will make sure 
your guests are impressed."

Johnnie P. Luehrs
 - President/CEO 
Dillon County Chamber of Commerce

"Since 2002, I have had the pleasure of working with Barnhill’s Port-A-John on many occasions. I have worked with Mr. Barnhill with Chamber events, City of Dillon, Town of Latta and Dillon County events. I have been very pleased and satisfied with his services. His prices are more than reasonable...

J. DuRant Martin
 - Owner, Carolina Realty & Associates

"In today's business climate it is refreshing to see someone like you and your staff that actually does what it says it's going to. Your impeccable service you provide for my job sites are second to none and it is great to do business with a company that does it...