When old sewer drain systems have to be brought into regulatory compliance, our Vertical Pipe Trap products (VPT's) can save refineries time, money, and space. VPT's are easy to install and maintain. Our VPT drain seals help the petrochemical industry comply with regulatory mandates and contribute to a safe, odor-free work environment.

VPT's are simply caulked into existing drain systems without the need for shut-downs or labor intensive installation procedures. VPT's allow normal use of drains, but by establishing a column of water between the sewer system and the outside atmosphere, they prevent the escape of fugitive evaporation emissions. NsertAseal VPT inserts can also be used in new construction.

The innovative, patented VPT was developed to enable industry to meet the latest environmental control standards more conveniently and less expensively that other means available. A column of water held inside the VPT stops vapors from escaping through the process drain. VPT's are designed for easy installation and maintenance. Most drains can be retrofitted in a few minutes.

Installation of the VPT is simple and effective. VPT's are simply caulked into the existing drain hub or shaft using silicone or latex-based caulks. This allows for a semi-permanent installation that will often stay in place for years, yet will allow the periodic removal of the unit should that ever become desirable.

The VPT is available in a number of standard sizes and configurations to fit most standard industrial sewer drain configurations. For many years we made our standard inventory of VPT's from powder-coated cast iron. However, because of increasingly lengthy foundry lead times, rising costs, and other issues, we now fabricate some of our new VPTs models (particularly 4" and 6" short models) from stainless steel.

We still have a large inventory of powder-coated cast iron products in some sizes. We will be offering immediate shipment and lower prices on these models until inventories are depleted. New production in these models will be in stainless steel. Both materials have excellent performance qualities. Stainless steel is a bit more expensive, but when our inventories run out, shorter delivery schedules with newly constructed products will now be under our control. We also design and fabricate custom designed stainless VPTs for special, oddly shaped rain openings and other hard to fit applications.

A custom made VPT for a large opening (3 ft. diameter)