NSF Product and Service Listings
These NSF Official Listings are current as of Thursday, January 15, 2026 at 12:15 a.m. Eastern Time. Please contact NSF to confirm the status of any Listing, report errors, or make suggestions.
Alert: NSF is concerned about fraudulent downloading and manipulation of website text. Always confirm this information by clicking on the below link for the most accurate information: http://info.nsf.org/Certified/Plumbing/Listings.asp?Company=0H060&Standard=358&
NSF/ANSI 358
Water-Based Ground-Source “Geothermal” Heat Pump Systems
Water-Based Ground-Source “Geothermal” Heat Pump Systems
| WL Plastics Corporation |  |
| 3575 Lone Star Circle | |
| Suite 300 | |
| Fort Worth, TX 76177 | |
| United States | |
| 682-831-2727 | |
| Visit this company's website |
Facility : Titusville, PA
NSF/ANSI 358-1 Polyethylene Pipe and Fittings
| Product Type | Material Type | Trade Name | Product Standard | |||
Pipe* @ |
PE 4710 |
WL Plastics PA/WLP PA Geothermal Pipe |
ASTM D3035 |
|||
| 1/2" DR 7[1] | ||||||
|
3/4" - 3" DR 7 |
||||||
| 1/2" DR 9[1] | ||||||
|
3/4" - 3" DR 9 |
||||||
| 1/2" - 3" DR 11[1] | ||||||
|
1/2" - 3" DR 13.5[1] |
||||||
|
3/4" - 3" DR 15.5[1] |
||||||
|
3/4" - 3" DR 17[1] |
||||||
|
1" - 3" DR 21[1] |
||||||
|
1" - 3" DR 26[1] |
||||||
|
1 1/2" - 3" DR 32.5[1] |
||||||
[1] These pipe sizes are not certified for use in potable water applications containing
oxidizing disinfectants and shall not be marked with a CC oxidative resistance
classification.
* These products also meet the requirements for PE 3408 per ASTM D3350-02a. @ Certified product may include a fused U-bend fitting. |
||||||
Pipe* @ |
PE 4710 |
WL Plastics PA/WLP PA Geothermal Pipe |
ASTM F714 |
|||
| 4" - 18" IPS DR 7.3 | ||||||
| 4" - 26" IPS DR 7 | ||||||
| 4" - 36" IPS DR 9 | ||||||
| 4" - 42" IPS DR 11 | ||||||
| 4" - 48" IPS DR 13.5 | ||||||
| 4" - 54" IPS DR 15.5[2] | ||||||
|
4" - 54" IPS DR 17 |
||||||
| 4" - 54" IPS DR 21 | ||||||
| 4" - 54" IPS DR 26 | ||||||
| 4" - 54" IPS DR 32.5 | ||||||
| 4" - 54" IPS DR 41 | ||||||
[2] Special sizes may be acceptable for engineered applications, due to system conditions or
special local requirements. It is the responsibility of the end user to ensure the
product is suitable for the intended application.
* These products also meet the requirements for PE 3408 per ASTM D3350-02a. @ Certified product may include a fused U-bend fitting. |
||||||
Number of matching Manufacturers is 1
Number of matching Products is 22
Processing time was 0 seconds
