PRINCIPLES OF OPERATION

VacuFlush systems use a small amount of water (one pint to one quart) and the vacuum that is generated by the vacuum pump to flush. Each toilet must be con- nected to a pressurized water system. Fresh water is recommended and will result in an odor-free bathroom. If seawater is used, the water should be filtered.

No complicated user instructions are required. Lifting the flush lever adds water to the bowl. Pressing the flush lever (or pulling the flush lever on a 106 toilet) opens a mechanical seal that allows the vacuum force to pull the waste from the bowl as clean water rinses the bowl. The vacuum moves the waste (at approximately 7 feet [2.1 m] per second) through a one-inch opening in the toilet base. Incoming air fragments the waste as it passes through the base opening. This process eliminates the need for macerators or mechanical motors in the toilet base.

Next, the waste is transferred into the Vacuum Holding Tank (VHT). System vacuum is monitored by a vacuum switch that is located on the outside of the VHT. When the switch senses a drop in vacuum in the system, it automatically signals the pump to energize and bring the vacuum back to operating level. This process is nor- mally completed in about one minute.

In a properly operating system, the stored vacuum will “leak” down between flushes, causing the vacuum pump to run for a short period. The pump should not run more than once every three (3) hours after the last flush.

An “On-Off” night switch can be installed to silence the vacuum pump during sleeping hours. The VacuFlush Status Panel, an optional accessory, features an inte- gral circuit breaker that provides a convenient night switch.

IMPORTANT: Before pumping out the VHT, it is recommended that the power to the system be turned off. Then, flush the toilet. This releases the stored vacuum in the tank, thus, allowing the dockside pump to empty the waste out more easily. If the dockside pump has low suction capability, you may need to flush the toilet a second time during the pump out.

The Vacuum Relief Valve (VRV) will automatically open at 13" of vacuum and is spring loaded to close at 11" of vacuum to prevent leaking during normal operation.

SYSTEM LAYOUT

The Vacuum Holding Tank (VHT) system can be installed on most boats that presently use a portable, manual or electric toilet. The following procedure will be helpful:

1.Review the typical system layout to get a general idea of how the system will operate and what discharge options will be considered (see Figure 1).

2.Draw or obtain a layout of the boat which allows the location of head compartments, bulkheads, engine space, tanks, through-hull fittings, etc. This layout should include top views and side views and show relative distances and heights with reasonable accuracy.

3.Use the information in the Component Locating Procedure section to help select the best locations for your boat layout.

4.Routing of vacuum hose should be considered when selecting a location for the toilet and the (VHT). A maximum of 20 feet (6.1 m) of hose can be used be- tween the toilet and the VHT.

5.Before starting the actual installation, carefully re- view the Key Installation Points.

Figure 1

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SeaLand VACUUM HOLDING TANK owner manual Principles of Operation, System Layout
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VACUUM HOLDING TANK specifications

The SeaLand Vacuum Holding Tank is a high-performance solution designed specifically for marine sanitation systems. These tanks ensure efficient waste management on boats and yachts, providing a reliable method for holding sewage until it can be properly disposed of. Engineered with advanced technology, SeaLand vacuum tanks are known for their durability, lightweight design, and effective waste containment capabilities.

One of the main features of the SeaLand Vacuum Holding Tank is its vacuum-based waste collection system. This technology uses a vacuum pump to draw waste into the holding tank, eliminating the need for traditional gravity systems. This design minimizes the chances of leaks and backflow, ensuring a clean and odor-free environment on board. With a vacuum system, the tank can also operate efficiently in various boat configurations, including those with limited space.

The SeaLand tank is constructed from high-quality, corrosion-resistant materials that withstand the harsh marine environment. Its robust design prevents degradation due to exposure to saltwater, providing longevity and reliability. The tank is designed for easy installation and maintenance, featuring a compact size that fits smoothly into the limited spaces typical in marine vessels.

Another notable characteristic of the SeaLand Vacuum Holding Tank is its innovative level monitoring technology. This feature enables boat owners to track the waste level inside the tank accurately, which is crucial for ensuring compliance with marine sanitation regulations. The monitoring system alerts users when the tank reaches its capacity, prompting timely disposal and preventing overflow situations.

Moreover, SeaLand focuses on user-friendliness, ensuring that its vacuum holding tank is compatible with a variety of marine sanitation systems. The installation process is straightforward, and the tank can be integrated with existing components without requiring extensive modifications. This flexibility makes it a preferred choice for boat builders and owners looking for an efficient waste management solution.

In summary, the SeaLand Vacuum Holding Tank is a state-of-the-art waste containment system for marine applications. Its vacuum technology, durable construction, level monitoring capabilities, and ease of installation set it apart from traditional holding tanks, making it an ideal choice for any vessel seeking effective waste management solutions. Whether for recreational or commercial use, this tank ensures that boating remains a clean and enjoyable experience.
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