Sealand 385318032 Vacuflush Vacuum Tank Switch Kit
If your Vacuflush toilet pump seems to run longer than it should, or your vacuum generator just won't shut off even though the system feels like it's holding pressure just fine, the culprit is usually a tired vacuum tank switch. The Sealand 385318032 Vacuum Tank Switch Kit is built to solve exactly that problem. It's designed as a direct replacement for the switch on accumulator-style, threaded vacuum tanks, and it comes factory preset so there's no guesswork involved in setup - you install it and it's ready to work.
Installation is refreshingly simple. The switch screws directly into the end of the vacuum tank using a 3-inch male pipe thread, and a new O-ring is included to create a tight, reliable seal between the switch flange and the tank itself. That seal matters more than it might seem, since even a small leak at this connection can cause the pump to run continuously or fail to build adequate vacuum. Once installed, the switch is calibrated to cut out around 10 mm Hg, which keeps the system operating within its intended range.
This kit is a smart pick for boat owners and RV owners alike who are troubleshooting a Vacuflush toilet that won't stop cycling, or who are doing preventative maintenance on an aging marine sanitation system. It's compatible with the original 729100 vacuum accumulator tank and similar threaded tank models, making it one of the more straightforward fixes for a common and frustrating failure point.
Key Features
- Direct replacement for the original Vacuflush vacuum tank switch
- Factory preset — no field calibration required
- Includes new O-ring for a leak-free seal at the tank flange
- Simple screw-in installation using a 3" male pipe thread
- Cuts out at approximately 10 mm Hg vacuum
Applications
- Marine sanitation systems using Vacuflush toilets
- RV toilet systems with accumulator-style vacuum tanks
- Replacement for a vacuum generator/pump that won't shut off despite adequate vacuum
- Maintenance and troubleshooting for aging vacuum tank switches
Specifications
- Connection: 3" male pipe thread (screws into tank end)
- Seal: New O-ring included
- Switch cutout pressure: approximately 10 mm Hg
- Compatible tank: original 729100 vacuum accumulator tank and similar threaded models
- Note: assembly does not include a cap/switch cover
Frequently Asked Questions
Q: Will this switch work with my existing vacuum tank, or do I need a new tank too?
A: The 385318032 is designed to fit the original accumulator-style, threaded vacuum tank (such as the 729100), so in most cases you only need to replace the switch, not the entire tank.
Q: Does this kit include everything needed for installation?
A: Yes, the kit includes the vacuum switch and a new O-ring for the seal. It does not include a cap or switch cover, so keep your existing one if it's still in good condition.
Q: How do I know if the switch is actually the problem and not the pump?
A: A common sign is the vacuum generator or pump continuing to run even after the toilet has reached sufficient vacuum. If a vacuum gauge shows the system is holding around 10 mm Hg or more but the pump won't cut out, the switch is likely worn or failing.
Q: Is any special tooling required to install this switch?
A: No special tools are typically needed. Since it uses a 3" male pipe thread, it simply screws into the end of the vacuum tank by hand or with basic hand tools.
Q: Can this switch be adjusted after installation if it doesn't seem to be cutting out correctly?
A: The switch comes factory preset for consistent performance, so it's not intended to be field-adjusted. If it isn't cutting out properly after installation, double-check the O-ring seal and thread connection first.
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