

20" Car Wash Replacement Filter - Extra Durable
In stock
Our DUR-DA cartridges [DDA-10 & DDA-20] are best suited for use in Very hard water areas where durability is required. These cartridges just remove the TEMPORARY HARDNESS salts that do most of the damage when trying to get a good finish. The result is NOT quite as good as the STANDARD cartridge – but it is far more durable.
Water should be used sparingly (i.e. only for the final rinse) to ensure the cartridges remain effective for as long as possible.