Unit holds approximately 3 oz. per foot. Supplied with three 5’ sections of 3/4” plastic pipe with screw type fittings. Enables easy visual inspection of sludge level. Check valve has a pin extending below unit to enable easy draining or sampling of liquid in unit. Additional 5’ extensions available on special order. Top section includes a nylon line for raising the sampler. Shipping weight: 3 lbs. 8 oz.