Vortens tank-to-bowl gasket replacement
Vortens uses standard universal 3-inch tank-bowl gasket pattern. Bemis 7530 at $5-$10 from any Home Depot fits all Vortens two-piece residential models directly. Onika and Lugano are one-piece (no tank-bowl gasket — bowl and tank molded as single unit).
When to replace
- Water leak between tank and bowl during flush
- Visible water at tank-bowl joint after flushing
- Bowl water drops slowly when toilet not in use (joint leak)
- Removing tank for any reason (preventive maintenance)
- Tank-bowl bolt heads visibly corroded
Vortens gasket compatibility
- 3464, 3414, Cascade, Cancun: standard 3-inch (Bemis 7530)
- Lugano, Onika: one-piece (NO tank-bowl gasket)
Replacement procedure (45 min — tank removal required)
- Shut off water at under-toilet shutoff valve
- Flush to empty
- Sponge out remaining water from tank and bowl
- Disconnect supply line
- From inside tank, remove tank-bowl bolt heads
- From under bowl, hold nut with wrench while loosening from inside tank
- Two-person: lift tank straight up off bowl
- Set tank aside on soft surface
- Remove old gasket from flush valve outlet
- Clean both mating surfaces with vinegar
- Install Bemis 7530 over flush valve outlet
- Lower tank back onto bowl, align bolt holes
- Insert new brass tank-bowl bolts
- Cross-tighten 1/4 turn alternately until snug. Stop at snug + 1/4 turn.
- Reconnect supply line, restore water
- Test 3-5 flushes
Pre-2014 Vortens special consideration
If you have a pre-2014 Vortens 3464 or 3412 (manufacture date 2008-2013) needing tank-bowl gasket service, verify settlement eligibility before investing in service. The tank itself may qualify for free replacement under the 2014 class-action settlement (which delivered the corrected 3464A porcelain mix), making any service investment on the original tank uneconomical.
Common service mistakes
- Bolts overtightened: Cracks porcelain. Snug + 1/4 turn limit.
- Bolts undertightened: gasket doesn't fully compress
- Old gasket fragments left: new gasket won't seal flush
- Pre-corroded bolts reused: replace bolts at same time ($3-$5 brass set)
- Wrong gasket diameter: Vortens uses standard 3-inch
Bolt corrosion service
Vortens toilets in humid bathrooms commonly have tank-bowl bolts corroded after 12+ years. If bolts won't unscrew:
- Apply penetrating oil. Wait 30 minutes.
- If still seized: hacksaw or Dremel through bolt head from inside tank.
- Drill out bolt remnants from underneath bowl.
- Replace with new brass tank-bowl bolts + new Bemis 7530 gasket.
Where to buy
- Home Depot: Bemis 7530 at $5-$8
- Lowes: Bemis 7530 at $5-$8
- Amazon: Bemis 7530 at $4-$7
- Korky alternative: Korky 449 universal 3-inch at $6-$11
Preventive maintenance bundle
Since tank is off: also replace flapper (Korky 2032BP, $7-$12), fill valve (Fluidmaster 400A, $10-$15), supply line (12" braided, $5-$10), tank-bowl bolts ($3-$5). Total bundle: $30-$50.