The Uponor TruFLOW™ Classic Manifold Extension Kit is designed for easy, inline extension of up to two additional loops for the TruFLOW Classic Manifold Assembly. The kit contains two 1-1/4 in BSP nipples, one supply manifold, one return manifold and two loop end caps. Use Uponor Silicone Oil (A2620007), included in the kit and also sold separately, or similar silicone lubricant on the male threads to ease installation.