Sealand VG2 Vacuum Switch O-Ring – Part Number 385311836
If your VacuFlush toilet has started cycling oddly, running longer than it should, or the vacuum switch just isn't sealing the way it used to, the culprit is often a worn-out O-ring rather than the switch itself. This small rubber seal sits between the vacuum switch and the VG2 vacuum generator, and once it hardens or cracks with age, air sneaks past it and throws off the whole system's pressure readings. Swapping in a fresh O-ring is usually all it takes to get things running quietly and predictably again.
This particular seal is built specifically for Sealand's VG2 vacuum switch assembly, so it drops right into place without any modification or guesswork. It's made from a rubber compound designed to hold up against the moisture, pressure cycling, and general wear that comes with regular use in a marine or RV holding tank system. Because the switch typically calls for two O-rings to form a complete seal, most owners pick up a couple at once so the job only needs doing once.
Whether you're maintaining a boat's onboard head or keeping an RV's sanitation system running smoothly, this O-ring is the kind of inexpensive part that prevents a much bigger headache down the line. It's a straightforward fix that restores proper vacuum function and helps the rest of the system, from the generator to the tank, work the way it was designed to.
Key Features
- Precision-molded rubber construction for a tight, reliable seal
- Direct-fit replacement for Sealand VG2 vacuum switch assemblies
- Resists moisture, pressure cycling, and general wear over time
- Simple, tool-friendly installation with no modification required
- Sold individually; switch assembly typically requires two O-rings
Applications
- Sealand VacuFlush VG2 vacuum generator systems
- Marine toilet vacuum switch assemblies
- RV and coach toilet vacuum switch assemblies
- Boat sanitation and holding tank vacuum systems
Specifications
- Brand: Sealand (Dometic)
- Part Number: 385311836
- Cross-Reference Numbers: 311836, 342778
- Older Part Number: 600342778
- Material: Rubber
- Fitment: Vacuum Generator 2 (VG2) vacuum switch
- Quantity Required Per Switch: 2 (sold individually)
Frequently Asked Questions
Q: How many O-rings does a Sealand VG2 vacuum switch need?
A: The VG2 vacuum switch typically requires two of these O-rings to form a complete seal, so most installers order a pair at the same time.
Q: What are the signs that this O-ring needs to be replaced?
A: Common signs include a vacuum switch that won't hold pressure, a toilet that cycles longer than normal, or a vacuum generator that runs more often than it should.
Q: Is this O-ring compatible with older Sealand vacuum switch models?
A: Yes, it cross-references to older part numbers 311836, 342778, and 600342778, so it fits earlier VG2 switch assemblies using those designations.
Q: Can this O-ring be installed without special tools?
A: Yes, it's designed for straightforward hand installation as part of routine vacuum switch maintenance, without any special tools or modifications.
Q: Does this part work on both marine and RV sanitation systems?
A: Yes, it's used in Sealand VacuFlush systems installed on boats as well as RVs and coaches that rely on the same VG2 vacuum switch design.
CLRMarine
