PVS Installation and Information Listed

PVS Underground Installation Guidelines

1) Dig trenches in accordance to plans and specifications; confirm thelocation of any existing utility lines or piping.

2) Allow 3 inches of encasement clearance around duct for backfill ofdrainage material or concrete. Structural reinforcement or a slab must bein place where point loading may occur.

3) Pitch all piping systems back towards the utility room for properdrainage. Wrapping duct in a vapor barrier is recommended to preventsurface water leaching into the duct system from natural drainage.

4) Hold-down straps and pipe reinforcements are recommended for largediameter or concrete encased systems.

5) Fasten joints with metal screws or pop rivets used at 6” intervals with aminimum of three per joint, then seal with approved sealer or tape.

6) If the PVC coating has been damaged during installation, PVC paint isavailable to touch up any scratches that may have occurred.

7) Care should be taken to not pour or back-fill directly onto the piping system. The pour or back-fill can now be completed, with carebeing used as the concrete or back-fill is placed over the top of the duct, no powered vibrator should be used in the compaction of theconcrete or back-fill. For soil encasement systems, no external loads should be allowed at any time unless previous calculations allowfor these load conditions.

The duct, encased either in concrete or buried directlybelow a concrete slab, is installed above the original lineof undisturbed soil and above the water table. Encasingthe duct in concrete with porous fill beneath is the bestway to install Spiral vinyl-coated duct. An optional vaporbarrier can be place between the slab and the fill.

These are only basic guidelines; you must check your local building codes for more specific installation instructions.

PVS Information

PVS Spiral pipe is UL listed and manufactured from prime hot dipped galvanized steel coated with polyvinyl chloridematerial, with an outside thickness of 4-mil and inside 1-mil, standard. This is reversible for special purposes. Forextreme duty applications a 4x4 coating is applied. External corrugations are standard for 14” diameters and over forunderground applications. Standard gauges are 4” to 16” / 24 gauge, 17” to 24” / 22 gauge, 26” to 48” / 20 gauge. OurPVS coated class I duct has a temperature range of -40 F to 250 F and should not exceed 3600 fpm with positive andnegative pressure limits not in excess of 6 inches water column. For more detailed specifications, visit our website.

PVS Compliance data

Spiral Manufacturing Co., Inc. PVS products comply with the following codes and industry standards:UL 181 Class IInternational Mechanical Code – 1996 Section 603BOCA National Mechanical Code – 1993ICBO Uniform Mechanical Code – (UMC) 1997SMACNA Sheet Metal Air Conditioning Contractors National Association