Tigre
SDR35 Gasketed Concentric Increaser Coupling - Gasket x Gasket
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
SDR35 Gasketed Concentric Increaser Coupling - Gasket x Gasket
The SDR35 Gasketed Concentric Increaser Coupling connects compatible SDR35 PVC sewer and drainage pipes of different nominal diameters. Its concentric design keeps the larger and smaller openings aligned on a common centerline, providing a centered pipe-size transition.
Manufactured by Tigre DuraPlastic, these increaser couplings feature Gasket x Gasket (GxG) connections for joining compatible spigot-end piping. Available in 6" x 4", 8" x 4", and 8" x 6" sizes, they provide a gasketed transition between different pipe diameters without requiring a separate reducing bushing.
Product Highlights
- SDR35 gasketed concentric increaser coupling
- Gasket x Gasket (GxG) connection configuration
- Gasketed connection at both ends
- Concentric, common-centerline transition
- Connects compatible pipes of different nominal sizes
- Available in 6" x 4", 8" x 4", and 8" x 6" sizes
- Designed for SDR35 PVC sewer and drainage systems
- Injection-molded PVC fitting size range
- Virgin PVC compound
- PVC cell classification 12454 or 13343
- PVC compound certified to ASTM D1784
- Applicable ASTM D3034, ASTM F1336, and CSA B182.2 manufacturing standards
- Gaskets manufactured to ASTM F477 or ASTM F913
- Gasketed joints comply with ASTM D3212
- Gasketed joint testing includes internal pressure and vacuum conditions
- Joint testing includes misalignment and 5% top-load deflection
- Firmly seated gaskets help prevent dislocation or misalignment
- Third-party NSF certification where applicable
- Made in the USA
Available Sizes & Part Numbers
Each fitting has a larger and smaller nominal connection. Both ends use the manufacturer's Gasket x Gasket configuration. Confirm the nominal sizes of both pipes before ordering.
| Nominal Size | Connections | Part Number | SKU | Unit Weight |
|---|---|---|---|---|
| 6" x 4" | Gasket x Gasket | 35-1640 | 300004467 | 1.540 lb |
| 8" x 4" | Gasket x Gasket | 35-1641 | 300004488 | 3.500 lb |
| 8" x 6" | Gasket x Gasket | 35-1642 | 300004498 | 7.300 lb |
Technical Specifications
| Brand | Tigre DuraPlastic |
|---|---|
| Product Type | SDR35 Gasketed Concentric Increaser Coupling |
| Product Family | SDR35 Gasketed Fittings |
| Fitting Configuration | Concentric Increaser Coupling |
| Connection Configuration | Gasket x Gasket (GxG) |
| Number of Connections | Two gasketed openings |
| Transition Design | Concentric (Common Centerline) |
| Available Nominal Sizes | 6" x 4", 8" x 4", and 8" x 6" |
| SDR Classification | SDR35 |
| Material | PVC |
| Construction | Injection molded, based on Tigre's 4" through 12" SDR35 fitting range |
| PVC Compound | Virgin PVC compound |
| PVC Cell Classification | 12454 or 13343 |
| PVC Material Standard | ASTM D1784 |
| Manufacturing Standards | ASTM D3034, ASTM F1336, and CSA B182.2, as applicable |
| Gasket Standards | ASTM F477 or ASTM F913 |
| Gasketed Joint Standard | ASTM D3212 |
| Gasketed Joint Testing | Internal pressure (exfiltration) and vacuum (infiltration), including gasketed joint misalignment and 5% top-load deflection |
| Gasket Retention | Gaskets firmly seated to help prevent dislocation or misalignment |
| Certification | Third-party NSF tested, certified, and listed to ASTM D3034, ASTM F1336, and CSA B182.2, where applicable |
| Country of Manufacture | USA |
Manufacturer Technical Drawing Dimensions
Tigre's supplied SDR35 technical drawing collection does not include a part-specific dimension table for concentric increaser couplings 35-1640, 35-1641, or 35-1642. Contact the manufacturer for dimensions needed for layout, installation, or clearance verification.
| Part Number | Nominal Size | Manufacturer Dimensions |
|---|---|---|
| 35-1640 | 6" x 4" | Contact manufacturer |
| 35-1641 | 8" x 4" | Contact manufacturer |
| 35-1642 | 8" x 6" | Contact manufacturer |
Dimensions from eccentric increaser couplings or concentric reducer bushings should not be substituted for these concentric increaser coupling part numbers.
Product Details
Concentric Size Transition
Connects different nominal pipe diameters while keeping the openings aligned on a common centerline.
Gasket x Gasket Connections
Both openings use gasketed connections designed for compatible SDR35 piping.
Three Size Configurations
Available in 6" x 4", 8" x 4", and 8" x 6" nominal sizes.
PVC Construction
Part of Tigre's SDR35 injection-molded fitting size range, using the manufacturer's specified PVC compound.
Gasketed Joint Requirements
Tigre specifies ASTM F477 or ASTM F913 gaskets and ASTM D3212 gasketed joints for this fitting family.
Installation Compatibility
Confirm both nominal pipe sizes and obtain required dimensional information before installation.
Product Resources & Support
Review Tigre's SDR35 gasketed fitting specifications, technical drawings, and product catalog. Contact GetPipe.com for assistance with concentric increaser coupling sizes, connection compatibility, or manufacturer dimensions.
Frequently Asked Questions
What is an SDR35 gasketed concentric increaser coupling?
It is a fitting designed to connect compatible SDR35 PVC sewer pipes of different nominal diameters while keeping their openings aligned on a common centerline.
What does GxG mean?
GxG stands for Gasket x Gasket. The fitting has a gasketed connection at both ends.
What sizes are available?
Available nominal sizes are 6" x 4", 8" x 4", and 8" x 6".
What is the difference between concentric and eccentric increaser couplings?
Concentric increaser couplings keep both pipe openings aligned on a common centerline. Eccentric increaser couplings have offset opening centers.
Is this the same as a concentric reducer bushing?
No. These are Gasket x Gasket increaser couplings. Concentric reducer bushings may have a different connection configuration, such as Spigot x Gasket.
Are both ends gasketed?
Yes. The manufacturer identifies these couplings with a Gasket x Gasket (GxG) connection configuration.
Are these fittings injection molded?
All three sizes fall within Tigre's specified 4" through 12" injection-molded SDR35 fitting range.
What material specifications apply?
Tigre specifies virgin PVC compound with cell classification 12454 or 13343, certified to ASTM D1784, for its injection-molded SDR35 fittings.
What standards apply to the gasketed joints?
Tigre specifies gaskets manufactured to ASTM F477 or ASTM F913. Gasketed joints comply with ASTM D3212.
Where can I find the exact coupling dimensions?
The supplied technical drawing collection does not identify dimensions for parts 35-1640, 35-1641, or 35-1642. Contact Tigre or GetPipe.com for part-specific dimensions.
Can these fittings be used with compressed air or gases?
No. Do not use these fittings with compressed air or gases. Do not test PVC piping systems with compressed air or gases.
Important Ordering & Safety Notes
Ordering: Verify both nominal pipe sizes before selecting a concentric increaser coupling.
Connection Configuration: All three listed fittings have Gasket x Gasket connections. They are not Spigot x Gasket reducer bushings.
Concentric Design: Confirm that a centered pipe transition is appropriate for the intended system layout.
System Compatibility: Verify compatibility with the intended SDR35 PVC sewer or drainage piping system and both mating pipe ends.
Installation: Follow the manufacturer's requirements for pipe preparation, gasket lubrication, insertion, alignment, and joint assembly.
Gasket Retention: Ensure gaskets remain firmly seated during assembly to prevent dislocation or misalignment.
Dimensions: Confirm part-specific dimensions with Tigre before relying on installation clearances.
Compressed Air and Gases: Do not use these fittings for compressed air or gases. Do not test PVC piping systems with compressed air or gases.
Fluid Compatibility: Do not use these fittings with liquids not recommended by Tigre.
Warranty: Modification of fittings voids the manufacturer's warranty. Specifications are subject to change without notice.
