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Carnation

Filter Fabric Sock

Filter fabric sock 

Need the 4" version.

Available for about $20 for a 100 foot length from Home Depot:

http://www.homedepot.com/Plumbing-Drain-Openers/Drain-Sleeve/h_d1/N-5yc1vZ1xg1ZbqncZ1rc/R-100357233/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053