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Dometic SeaLand 385311658 RV Toilet Flush Ball Seal for 300, 301, 310 and 320 Toilets Engineering Diagram
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SPECFOUNDRY SKU: SF-RV-102 · BRAND REF: Dometic / SeaLand

Dometic SeaLand 385311658 RV Toilet Flush Ball Seal for 300, 301, 310 and 320 Toilets

Stamped Casting / OEM Numbers: 385311658

Compatible Units: Dometic / SeaLand 300, 301, 310 and 320 series RV toilets

Critical Dimensions & Spec: Replacement flush ball seal (seal only)

$58.99
✓ Ships from a US supplier, usually 3-7 business days
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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 / SeaLand 300, 301, 310 and 320 series RV toiletsDirect 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:

  • Water stays in the bowl draining slowly to the tank
  • Holding-tank odor comes up through the bowl
  • Old seal is cracked or leaking

Step-by-Step Dimensional Verification & Installation Notes

Shut off the water and drain the bowl. Follow the Dometic service instructions for your 300-series toilet to reach the ball seal, then replace it. Check the model label on the toilet first; this part is for 300, 301, 310 and 320 only.

Frequently Asked Technical Questions (385311658)

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

On Dometic / SeaLand assemblies, look for the stamped or die-cast numbers (385311658) 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 (Replacement flush ball seal (seal only)) as well.

Does SpecFoundry SKU SF-RV-102 directly replace OEM part 385311658 (385311658)?

Check the part number and model before ordering. SF-RV-102 is sold as Dometic / SeaLand 385311658 for Dometic / SeaLand 300, 301, 310 and 320 series RV toilets. If you are unsure, email us a photo of the old part and the appliance or window label before you order.

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

Before ordering, verify: (1) Stamped or OEM code matches one of 385311658; (2) Dimensional spec matches: Replacement flush ball seal (seal only); and (3) Application matches: Dometic / SeaLand 300, 301, 310 and 320 series RV toilets.

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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