I have some long rubber couplings (1-2 feet) in my pool plumbing, allowing some flex near the pump and filter. They are connecting 1-1/2" pipes together. I want a piece of this for another project, but I can't find anything as to where to get this. Lowe's and HD have short (4") couplers, and I can't find anything online or in pool stores. Does anyone know where I can find this, or even what a primary use is for it so I can narrow my search?