Zodiac DEV48 Jandy DEV Diatomaceous Earth Versa Plumb Filter, 48 Square Feet Jandy DEV diatomaceous earth versa plumb filter Heavy duty, durable, composite body made of corrosion and UV resistant materials Easy grip handles for comfortable filter maintenance; extra-large 2-inch drain port allows for easy cleaning on debris Clean or dirty indicator on pressure gauge allows you to know exactly when to clean the filter for optimal filtration and water savings Includes 2-inch by 2 1/2-inch universal unions; measures 48 square-feet in size