Defender Home Page
Phone: 800-628-8225 Fax: 800-654-1616 Int'l.: 860-701-3400 Email: Contact Us
Follow us on Facebook
Shipping Info
Defender Home Page
Your Cart
null View Cart View Shopping Cart
null Check My Order(s)
null Track My Package(s)
Conversion Chart
Shopping Areas
Boats & Motors
null Defender Seal null
promo A
promo B
promo C
promo D
Dometic 15 HTS-HRZ Basic Series Waste Water Holding Tank System - 15 Gallon

Dometic 15 HTS-HRZ Basic Series Waste Water Holding Tank System - 15 Gallon

  • Capacity: 15 Gallons, Dimensions: 15" x 19" x 22"
  • Orientation: Horizontal, Material: Odor Free High-Strength Polyethylene
  • Includes (3) 1-1/2" Fittings and 5/8" TankSaver Relief valve
  • Item #: 
    Dometic(formerly SeaLand)
    Model #: 


    Shipping Weight: 
    48.97 Lbs.
    List Price: 
    Reg. Price:
    Sale Price:
    Status:    null In Stock

    Quantity : 

    Shipping weight reflects calculated Dimensional Weight and is not actual product weight - see here for details.

    Complete, reliable holding tank systems for use with marine toilets.
    Virtually any boat with room for a holding tank can now incorporate the advantages of Dometic’s premium-quality Holding Tank Systems.

    Leak-proof Design- Top-mounted hose connections eliminate standing liquid in discharge hose, preventing odor permeation through hose.

    Odor-free, Highly Durable Tank- 100% virgin polyethylene resin with extra-heavy wall thickness prevents odor permeation and resists corrosion.

    Implosion Protected- TankSaver® vacuum relief valve prevents damage from dockside pumps that use very high levels of vacuum.

    ISO/USCG Compliant- Dometic holding tanks fully comply with the ISO 8099:2000(E) standard and applicable U.S. Coast Guard requirements.

    System Features:

    • Heavy-duty 3/8" polyethylene
    • TankSaver® relief valve
    • Inspection port
    • Inlet
    • Vent outlet
    • Two discharge outlets


    • Tank capacity: 15 gal. (57 L)
    • Empty weight: 25 lbs. (11.3 kg)
    • Full weight: 145 lbs. (65.8 kg)
    • Inlet fitting size: 1-1/2 in. (38.1 mm)
    • Outlet fitting size: 1-1/2 in. (38.1 mm)
    • Vent outlet size: 5/8 in. (15.9 mm)
    • Dimensions: 15"H x 19"W x 22"D Horizontal

    NOTE: HTS-Basic Series holding tank systems do not include pumps. Pump is Sold Separately.


    Dometic DTM01 Holding Tank Monitor
    Item #: 501421
  • Monitors Level in (1) Waste Holding Tank - with Full Tank Alert
  • Power: 12 / 24 Volt DC, Includes (1) 1-Level Probe Assembly
  • Cutout: 1" dia., Dimensions (Panel): 3-1/4" x 2"
  •  Include
    Reg. Price

    Sale Price

    Model #:
    Dometic OdorSafe Hose Plus - 1-1/2 Inches
    Item #: 502434
  • Diameter: 1-1/2" ID, Color: White
  • Material: PVC Reinforced with PVC Helix, Tolerance: 270 PSI
  • Sold by the Foot, ( 50 feet Maximum Continuous Length )
  •  Include
    Model #:
    Dometic ECO Holding Tank Vent Filter Kit
    Item #: 503469
  • Applications: Replaces all Previous SeaLand and Dometic Vent Filters
  • Includes: Mounting Brackets and Hose Fitting Adapters for All Size Vent Hoses
  • Annual Filter Replacement Recommended
  •  Include
    Reg. Price

    Sale Price

    Model #:
    Dometic Universal Holding Tank Cleanout Kit
    Item #: 753760
  • Applications: Installs Easily on Any Rigid Holding Tank
  • Includes 3" Inspection Port, Cap, O-Ring, Gasket and Stainless Hardware
  • Function: Provides Easy Access to Tank Interior for Inspection / Cleaning
  •  Include
    Model #:
    Forespar Replacement Waste Deck Fill
    Item #: 300826
  • Type: Waste, Includes Nylon Retainer Cord, Color-Coded Black Cap (Keyed)
  • Material: Marelon, Extra Large Flange Diameter: 4"
  • Hose Barb Diameter: 1-1/2" OD
  •  Include
    Model #:
    Whitecap Tank Vent with Wire Screen
    Item #: 300829
  • Includes Screen Flame Arrestor, Material: 316 Stainless Steel
  • Hose Size: 5/8", Hole Cutout: 3/4"
  • Applications: Commonly Used on Fuel Tanks but Works to Vent Any Tank
  •  Include
    Model #:
    Whitecap Fuel Tank Vent with Wire Screen
    Item #: 300830
  • Type: Angled (90 Degrees), Material: 316 Stainless Steel
  • Applications: 5/8" Inside Diameter Hose, Hole size is 3/4"
  • Commonly Used on Fuel Tanks but will Vent Any Tank
  •  Include
    Model #:
    Todd Fresh Water / Waste Water Holding Tank - 15 Gallons
    Item #: 503130
  • Capacity: 15 Gallons, Dimensions: 25" x 11" x 15"
  • Orientation: Vertical, Material: Odor Free Plastic also Seals in Waste Odors
  • Includes (2) 1-1/2" and (2) 3/4" NPT Hole -Fittings Sold Separately*
  •  Include
    Reg. Price

    Sale Price

    Model #:

    Have A Suggestion?

    This form is intended to improve the current product page. For Customer Service, please click here

    Help us make our site better for everyone! Let us know you've found something wrong or frustrating on this page and we will improve it. Please mark each that apply.

    Product has been improperly categorized
    Page loads too slowly
    Product information is incorrect
    Page has errors or bugs
    Site is frustrating or difficult to use
    Product image is missing or wrong
    Cannot find my size
    Spelling errors on page
    Not enough product information

    Comments or Examples:
    Examples: Missing information such as dimensions and model number, typos, inaccuracies, etc...

    Please include your e-mail address below if you would like us to respond to your comments or questions.             

    Join Our Email List And Receive our Monthly Promotions
    Defender Email Specials
    Click Here For Our Privacy Policy