SDR 35 PVC STI™ Gasketed Sewer Fittings
Injection Molded in Sizes 4” – 12”
Fabricated in Sizes 15" - 36"

STI™ features a one-piece integral bell and an extended pre-alignment entrance that aids in proper alignment of pipe and fittings. In addition to scientifically formulated resins, square pipe stops resist pipe push-through while extra heavy support is provided under the pipe stop at branch intersections for added strength. The 4” – 6” reducing braches on 8”, 10”, and 12” fittings have a minimum wall thickness of SDR 18.

Applications
STI™ Gasketed Sewer fittings are intended for nonpressure drainage of sewage and surface water.

Certification
STI™ Gasketed Sewer fittings are third party tested and listed by NSF, UPC and CSA to meet specifications defined in ASTM D 3034, ASTM F 1336 and CSA B182.2, where applicable.

Product Spotlights
Controlled Settlement Joint (L6304, L6306)
The controlled settlement joint (CSJ) inhibits penetration of the riser through the lateral connection and into the waterway. The new double gasketed CSJ is a “slip joint” that permits a maximum of 5-1/2” of axial movement of the riser with forces exceeding 500 lb/feet. Riser movement typically occurs from settlement forces or concentrated loads resulting from elevation changes in service connections. The controlled settlement joint in conjunction with proper backfill techniques, offers a solution that inhibits damage such as splitting or cracking. As a result, this minimizes costly excavation and replacement of damaged system components. Plastic Trends’ Controlled Settlement Joint has certification listing through NSF and CSA. It is available in diameters of 4”, 5”, or 6’ and in SDR 26, SDR 28, or SDR 35.

Vertical Riser Adapter (G984, G986, G988)
This simple solution in conjunction with the unique integral flange, inhibits system failure due to pipe spearing beyond the pipe stop.

Short Form Specifications

4” through 12” injection molded gasketed SDR 35 sewer fittings shall be manufactured in accordance with ASTM
D 3034, ASTM F1336, and CSA B182.2. They shall be injection molded from virgin PVC compound having a cell
classification of 12454 or 13343 in accordance with, and certified by the National Sanitation Foundation (NSF), to
meet ASTM D 1784. Gaskets shall be manufactured in accordance with ASTM F 477 or ASTM F 913. Gaskets shall be
firmly seated in fitting in order to ensure proper installation and to prevent dislocation or misalignment during system
assembly. Gasket joints must comply with ASTM D 3212 Internal Pressure Test (exfiltration) and Vacuum Test (infiltration)
at 5 degrees of gasket joint deflection.
Where available, reducing branches on injection molded 8”, 10”, and 12” tees, wyes, and tee-wyes shall be minimum
DR18 wall thickness in the reducing branch body and reducing branch hub below the gasket race.
Gasketed SDR 35 sewer fittings shall be certified by the National Sanitation Foundation (NSF) and, in applicable
configurations, by the International Association Of Plumbing And Municipal Officials (IAPMO) to meet ASTM D 3034,
and by the Canadian Standards Association (CSA) to meet CSA B182.2.

Municipal Products