The knob is for obstacles
Chlorine test reagents for Taylor Kits
RHP 2350ti
This is a PVC Schedule 80 Reducer Bushing with Spigot x FIPT fitting connections that measure 1 1/2 x 1/2 Inch
This is a Hayward Replacement Liquid Propane to Natural Gas Conversion Kit for H250FD Universal H-Series Low NOx and Pool and Spa/Hot Tub Heaters
Dolphin Retrofit for Cable Connection 2010 reagent-size_8 oz The knob is for obstaclesThis is a Maytronics Retrofit for Cable Connection 2010. This retrofit is used on several Dolphin cleaners. These include the Supreme M3 M4 M5, Wave 65 90, Wave 60 80, C3 C4, M200 M400, M500, Oasis, Nautilus CC Plus, Nautilus CC Supreme, Triton Plus, Sigma, Odyssey, and Aquarius XL pool cleaners.