PlumbingVoid® is an innovative, waterproof pipe isolation system that creates a complete void space around pipes and conduits below structural slabs. This prevents the surrounding soils from exerting damaging pressure that can cause shifting and costly breakage.

plumbing void close up
PlumbingVoid 1

PlumbingVoid® is comprised of non-corroding components that, when assembled in sequential order, temporarily support pipes and conduits prior to concrete placement. Designed to yield uplift forces, PlumbingVoid® moves independently, thereby isolating the plumbing/utility network.

Product Features
Eliminates Costly Damage

PlumbingVoid® protects pipes from uplift pressures produced by expansive soils as well as lateral pressures exerted by backfill. Designed to yield to uplift forces, it moves independently, thereby isolating the plumbing/utility network and preventing breakage.


PlumbingVoid® is recognized by engineers as a beneficial system for isolating pipes from the costly damage caused by expansive soils. We work extensively with the design community to develop designs best suited to the needs of individual projects.


Our products have been successfully utilized in professional applications. Contractors regularly report how quickly the system can be installed, as well as how easily the pipe elevation and slope can be adjusted and inspected.

Readily Available

No need to wait long periods to receive PlumbingVoid® components. With all stock sizes readily available, PlumbingVoid® can be shipped or delivered directly to your yard or jobsite location within a few days of ordering.

Easy to Install

PlumbingVoid® can be easily assembled to form an open space around pipes while temporarily suspending them via clevis hangers and threaded rods. Simple adjustment to the proper elevation allows for the creation of a desired slope before backfilling.


The unique design of the PlumbingVoid® system allows for easy modification and adaptation in the field. Challenging plumbing areas such as intersections, corners, and changes in elevation can be easily accommodated.


PlumbingVoid® components are waterproof, corrosion proof, and impervious to water that accumulates in pipe trenches. The system performs in standing water and eliminates project delays and expenses that occur with carton form replacement.


From start to finish, ordering PlumbingVoid® is easy! Our product advisors recommend appropriate systems based on particular pipe diameters and trench depths. These products are then delivered directly to your jobsite or yard.

Easy to Store and Handle

PlumbingVoid® components ship flat, allowing for delivery in neat, palletized bundles that maximize storage space. The fluted panels are lightweight and easy to handle.

Product Specs

PlumbingVoid® is comprised of corrosion-proof, waterproof components made from fiber-reinforced polymer (FRP), polypropylene, and polyacetal plastics.


Modified designs are available to accommodate both shallow and deep trench applications. The systems are easily fashioned in the field to allow for pipe transitions at any angle. Panels can be stacked using the patented Stacking Pins to provide greater heights as needed.


Available in standard heights and widths* to accommodate a variety of pipe diameters and elevations:
18” (H) x 18” (W)
18” (H) x 24” (W)
24” (H) x 18” (W)
24” (H) x 24” (W)
32” (H) x 18” (W)
32” (H) x 24” (W)
36” (H) x 18” (W)
36” (H) x 24” (W)
(*Custom dimensions are available by request.)


Panels are either 1/2", 3/4", or 1" thick, depending upon the flexural strength required. They can be layered (doubled up) for additional lateral strength. Spacer Bracket™/Crossbar Assemblies can be positioned between side panels to increase lateral support in deep trench applications. Stiffening Rods™ can also be inserted through the open channels in the side panels.

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