Ultraflow Winter Kit Compact Housing WhiteTruma Ultraflow Compact Housing White The Ultraflow Compact Housing Winter Kit is the standard housing for a pump assembly (or Ultraflow accessory) that does not include a filtration system or accessory point. This will work with a microswitch or pressure switched systems. Features And Benefits The Truma Ultraflow compact housing winter kit is a great way to introduce Ultraflow to your system if you don't already have it. Includes the following Truma