The Dometic DHT137L is the largest tank in this series of holding tanks designed to fit the most popular of boat models. There are five favoured tank sizes to choose from: 42, 60, 87, 110, and 136 l. The DHT137L is pre-plumbed with inlet and discharge fittings, a vent fitting, inspection port and a pressure relief valve. Dometic has been a long-time leading supplier of holding tank systems with numerous successful retrofit solutions and projects. This Dometic holding tank is specially developed for the European market and fully complies with ISO 8099 standards. Boat-builders can easily outfit a large boat with this high-quality holding tank, and assure their customers of long-lasting performance, no leaks or odors and total efficiency. The "plug 'n play" style tank is pressure tested and ready to install - just bolt it down and fasten the hoses.