April 28, 2022
| Effective Date | Percentages | Product affected | PDF Link |
| 5/16/2022 | 10-12% | (10-all PVC)(10-Valve box/drainage)(10-Drainage)(12-I-Fuse) | |
| 4/1/2022 | 6% | All products | |
| 1/10/2022 | 5% | All products | |
| 7/15/2021 | 10-15% | (10-all PVC)(15-Valve box/drainage) |
*Please note that the new list prices can be calculated by diving the current list price by the inverse percentage in decimal form. Ex: 10% increase = .90*