For boats that need only a holding tank, SeaLand HTS-Basic tanks deliver all the strength, odor-proof and leak-proof advantages of our other HTS models.
For boats 24–30 feet in length.
HTS-Basic Systems
For boats that need only a holding tank, SeaLand HTS-Basic tanks deliver all the strength, odor-proof and leak-proof advantages of our other HTS models.
TankSaver® relief valve
Inspection port
Inlet
Vent outlet
Two discharge outlets
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
SeaLand holding tanks fully comply with the ISO 8099:2000(E) standard and applicable U.S. Coast Guard requirements.
Specifications:
Tank capacity: 18 gal. (68 L)
Empty weight: 27 lbs. (12.2 kg)
Full weight: 178 lbs. (80.7 kg)

| Plumbing Connection |
| Inlet fitting size: 1-1/2 in. (38.1mm) |
| Outlet fitting size: 1-1/2 in. (38.1mm) |
| Vent outlet size: 5/8 in. (15.9mm) |