 If necessary, clamped joints can be disassembled later, and the fittings and pipe may be reconfigured.However, it is often not customary to re-use the clamps and rubber sleeves, which may be deformed by their previous installation, and may not seal as well after being rearranged.Clamped fittings may occasionally need to be disassembled to provide access for "snaking" or "rodding-out" with a special tool, to clear blockage or clogs.