Hydro Quip PS 4.0kW [15" x 2"] Electronic Heater [Short Cord] [Clamps] (48 PS40 S) cfrfilters and this Jacuzzi EW48 Manifold and this Jacuzzi EW48 Manifold and Grid Assembly is designed for compatible applications where the original internal assembly has worn out or become unreliable this part is well suited for a matched replacement approach that restores balance throughout the assembly rather than leaving mixed wear levels in place A heater like this is useful because it delivers direct in line heating while matching installations that depend on a more compact cord arrangement 240 volt heater with a short cord and clamp supported installation is needed