 Shares of Forterra Inc. shot up 17 in premarket trading Tuesday, after the maker of water and drainage pipes provided a second-quarter sales outlook that was above expectations, as higher average selling prices offset volume declines. The company said it expects sales of 410 million to 430 million, compared with 410 million a year ago and the FactSet consensus of 391 million. Product unit margins increased in both its business segments, while the volumes were consistent with expectations, with drainage volumes falling in the lower-teens percentage range from a year ago and water volumes staying relatively flat. Separately, the company said it fully repaid the 180 million borrowed under its revolving credit facility, which it borrowed as a precaution given the uncertainty surrounding the COVID-19 pandemic. Forterra said it also amended its credit facility to increase the size to 350 million from 300 million and extend the maturity to June 2025. The stock has run up 89.1 over the past three months through Monday, while the SP; 500 has gained 16.2. 