Rainbow Pentair 1/4id X 6 Poly Standpipe - R18761
No. 26 Image Shown R187616 In. Stand pipe 3/8 In Od X 1/4 In Od Used on Rainbow Pentair Chemical Feeders Chlorinator Parts Rainbow's 300 series of Off-line pool chlorinators are used when permanent installation is not desired or when there is no room to install the In-line version (approx. 4\" of pipe needed to install the 320 In-Line series). The 300 offline chlorinator can be secured into the floor for safety and stability.