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Dometic Sealand 385311658 & 385311641 300/310/320 RV Toilet Flush Ball Seal & VacuFlush Duckbill Kit Engineering Diagram
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SPECFOUNDRY SKU: SF-RV-102 · BRAND REF: Dometic / Sealand

Dometic Sealand 385311658 & 385311641 300/310/320 RV Toilet Flush Ball Seal & VacuFlush Duckbill Kit

Stamped Casting / OEM Numbers: 385311658 385311641 385310677 385311462 DOM-310-SEAL

Compatible Units: Dometic 300, 310, 320 Gravity RV Toilets & Sealand VacuFlush Marine/RV Toilet Systems

Critical Dimensions & Spec: 4" OD x 2.75" ID molded EPDM flush ball gasket (marked THIS SIDE UP) + paired 1-1/2" duckbill valve spec

$58.99
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Pre-Order Dimensional Verification Checklist

OEM Cross-Reference & Stamped Casting Number Table

Use this cross-reference table to confirm that the number stamped or printed on your original hardware or circuit board corresponds to SpecFoundry SKU SF-RV-102:

Stamped / OEM Part Number Manufacturer / System Brand Compatible Models & Years SpecFoundry Replacement SKU
385311658Dometic / SealandDometic 300, 310, 320 Gravity RV Toilets & Sealand VacuFlush Marine/RV Toilet SystemsDirect Match (SF-RV-102)
385311641Dometic / SealandDometic 300, 310, 320 Gravity RV Toilets & Sealand VacuFlush Marine/RV Toilet SystemsDirect Match (SF-RV-102)
385310677Dometic / SealandDometic 300, 310, 320 Gravity RV Toilets & Sealand VacuFlush Marine/RV Toilet SystemsDirect Match (SF-RV-102)
385311462Dometic / SealandDometic 300, 310, 320 Gravity RV Toilets & Sealand VacuFlush Marine/RV Toilet SystemsDirect Match (SF-RV-102)
DOM-310-SEALDometic / SealandDometic 300, 310, 320 Gravity RV Toilets & Sealand VacuFlush Marine/RV Toilet SystemsDirect Match (SF-RV-102)

Common Failure Symptoms Solved by SF-RV-102

Technicians and property owners typically replace 385311658 when experiencing one or more of the following failure modes:

  • RV toilet bowl will not hold water overnight (dry bowl & holding tank odor)
  • VacuFlush vacuum pump cycles every 10 minutes without flushing
  • Torn rubber ring around Dometic 300/310 foot-pedal flush ball

Step-by-Step Dimensional Verification & Installation Notes

Shut off 12V water pump, depress flush pedal to hold ball open, peel old seal out of upper groove, clean calcium buildup, and slip 385311658 seal into rim with 'THIS SIDE UP' facing up.

Related Technical Guide: Dometic, Norcold, Atwood & Suburban RV Circuit Board & Alde 3010/3020 Cross-Reference Guide →

Frequently Asked Technical Questions (385311658)

Where is the casting or OEM part number (385311658 / 385311641 / 385310677) stamped on this part?

On Dometic / Sealand assemblies, look for the stamped or die-cast numbers (385311658, 385311641, 385310677, 385311462, DOM-310-SEAL) on the underside of the metal housing, along the link arm, on the stainless hinge track, or printed on the circuit board/valve label. Note that casting numbers identify the housing casting, so always confirm critical dimensions (4" OD x 2.75" ID molded EPDM flush ball gasket (marked THIS SIDE UP) + paired 1-1/2" duckbill valve spec) as well.

Does SpecFoundry SKU SF-RV-102 directly replace OEM part 385311658 (385311658, 385311641, 385310677, 385311462, DOM-310-SEAL)?

Yes. SF-RV-102 is verified to match the mounting footprint, electrical/mechanical ratings, and dimensional envelope of Dometic / Sealand 385311658, 385311641, 385310677, 385311462, DOM-310-SEAL used on Dometic 300, 310, 320 Gravity RV Toilets & Sealand VacuFlush Marine/RV Toilet Systems.

What measurements should I verify before ordering SF-RV-102?

Before ordering, verify: (1) Stamped or OEM code matches one of 385311658, 385311641, 385310677, 385311462, DOM-310-SEAL; (2) Dimensional spec matches: 4" OD x 2.75" ID molded EPDM flush ball gasket (marked THIS SIDE UP) + paired 1-1/2" duckbill valve spec; and (3) Application matches: Dometic 300, 310, 320 Gravity RV Toilets & Sealand VacuFlush Marine/RV Toilet Systems.

How fast does SF-RV-102 ship and what payment methods are accepted?

SF-RV-102 ships within 1–2 business days from our US warehouse network. Flat-rate US Ground shipping is $8.95, or FREE on orders of $150+. You can check out online immediately via PayPal, Venmo, Credit/Debit Card, or request an Instant Card Payment Link / Net-30 Commercial PO Invoice.

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