Modern Seats for Vintage Case Lowboy Toilets

Retrofit Seats offers a precise, 3D-printed Case Toilet Seat Adapter Kit that lets you install modern toilet seats on classic Case lowboy toilets, including the 1000, 1100, and 3000 series. Available in a wide range of classic colors.

Built for strength, compatibility, and easy installation, our adapter helps you keep your original Case toilet working without the hassle of finding discontinued seat models. Each kit is carefully printed, inspected, and packaged to ensure a perfect fit.

Ditch the search for an original Case toilet seat—upgrade confidently with Retrofit Seats.

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The search is over, the only high quality case toilet seat adapter that allows you to use new, and available seats. Select your color, get your seat, 5-minute install.

Quick answers

Will this adapter fit my Case 1000, 1100, 3000, or 3200 toilet?

Yes—those four models share the rare 7-inch bolt spread. Our adapter aligns the holes so you can mount any modern Stay·Tite™ seat.

How do I measure the 7-inch bolt spread?

Measure center-to-center between the two seat-mount holes. If it’s ≈7 in (178 mm), the adapter is a perfect match.

Why are OEM seats (800 CCP / 1900 CCP) so expensive?

The original Bemis / Church seats cost $110 + and ship white-only. Most owners install our adapter instead—see the guides:
• 800 CCP (round)
• 1900 CCP (elongated)

What’s your return & warranty policy?

Unused kits: 14-day money-back.
Installed kits: 90-day workmanship warranty.
Full policy →

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