A disadvantage in compression connections is that they take longer threaded pipe fitting dimensions to make than sweat, and sometimes require retightening over time to stop leaks.

• 专业废变宝，只会做最好。宝吉牌废变宝专用机械设备系独家设计精工制造，竭力为老百姓创造和制造能挣钱的机遇和机器。