Dometic DHT137L Holding Tank The DometicDHT137LHolding Tank is leak proof, constructed with precut holes and tested fittings that can revolve making it easy to retrofit. TheDHT137L is also designed odor free and made from highly durable polyethylene6.3 mm wall thickness. The holding tanks capacity is 137 l for marine toilets. No leaks or offensive odors Made from highly durable polyethylene with a 6.3 mm wall thickness. Easy to fit with pre-drilled holes and pre-tested, installed fittings that can rotate 88 l (23 gal.) waste capacity Two separate outlets for dockside and overboard discharge Vacuum relief valve prevents damage from high-capacity dockside vacuum pumps Specifications: Dimensions Depth: 47 3/16″ Width: 15 1/2″ Height: 15 1/4″ Weight: 32 lbs