PortaPlunge Filter Only | Cold Plunge Water Filter SystemThis is a limited prototype batch for early adopters. Design and specifications may be updated in future production runs. Keep your plunge water fresh without the faff of constant refills. The PortaPlunge Filter Only is a plug and play filtration system designed for new plungers who are using natural cold weather to chill their pool and simply need clean, circulating water. This prototype filter kit partners perfectly with the PortaPlunge range and