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  3. Internal Seals
Seals, gaskets and O-rings

Internal Seals

Seals that work inside the pipe, the hub or the wall. Join pipe into a hub, tie a house line into a sewer, seal a pipe through concrete, or set a toilet without wax.

Hubs and bells Sewer tie-ins Concrete walls and manholes Toilets and urinals
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Find the right seal

Pick where the seal goes.

Showing all 8 seals

Fernco Donut compression gasketDonutsSeal pipe into a hub, bell or socket. No lead, no oakum and no cement.Cast iron hubs and clay bellsView product › Fernco Multi-Tite pipe gasketMulti-Tite Pipe GasketsCompression gaskets for service weight cast iron, hub to spigot.2″ to 15″View product › Fernco BR-64 rolling-style rubber O-ringBR-64 O-RingTie a 4″ house line into a 6″ sewer pipe.4″ into 6″View product › Fernco ICON Pushfit internal couplingICON PushfitReconnect pipe from the inside where it’s cut off at the slab or wall.4″ and 6″View product › Fernco Concrete Manhole AdapterConcrete Manhole AdaptersGive the grout something to grip where pipe enters a concrete manhole.4″ to 12″, larger to orderView product › Fernco Dual Puddle Flange with stainless steel clampDual Puddle FlangeSeal a pipe penetration before the pour. It’s cast into the wall or slab.Pipe OD 0.59″ to 25.20″View product › Fernco wax-free toilet sealWax-Free Toilet SealsSet a toilet without wax, and reset it with the same seal.3″ and 4″ drain pipeView product › Fernco FUS-2 wax-free urinal sealWax-Free Urinal SealSeal a wall-hung urinal to 2″ drain pipe without wax.FUS-2, 2″ drainView product ›
Cutaway of a Fernco Dual Puddle Flange clamped to a pipe and cast into a concrete foundation wall
Before the pour

Seal it before the concrete goes in

The Dual Puddle Flange clamps around the pipe and is cast into the wall or slab. It closes the gap that opens as concrete cures and shrinks away from the pipe.

  • Water, radon and hydrocarbons
  • Walls and slabs
  • Pipe OD 0.59″ to 25.20″
Explore Dual Puddle Flange
Why Fernco

The hard way isn’t always the right way

Lead and oakum, a jackhammer, a wax ring.
Each of these jobs has an easier way that still does it right.

White PVC pipe sealed into an old cast iron hub with a Fernco DonutInstead of lead and oakum

Seal PVC into a cast iron hub

A Fernco Donut compresses into the hub to seal the joint.See Donuts › A Fernco ICON coupling joining a pipe stub in a concrete foundation wall to new pipeInstead of breaking out concrete

Reconnect a pipe cut off at the wall

ICON pushes into 4″ or 6″ pipe by hand. No tools. Installs in 4 minutes or less.See ICON Pushfit › A toilet with a Fernco wax-free seal on the horn being lowered onto the floor flangeInstead of a wax ring

Set the toilet without wax

The seal sticks to the toilet horn and its ribs seal inside the drain. Reset the toilet with the same seal.See Wax-Free Toilet Seals ›

Where to next

Stock it, find it or ask us about it.

Distributors and retailers

Carry Fernco internal seals

Donuts, gaskets, O-rings, manhole adapters, puddle flanges, ICON couplings and wax-free seals. Parts plumbers ask for at the counter, from a supplier they already know.

  • Parts for plumbers, contractors and homeowners
  • Sell sheets, drawings and install instructions ready to share
  • Fernco reps in the field to support your counter and your customers
Become a distributor See the catalog pages ›
Plumbers and homeowners

Buy it

Find Fernco seals at plumbing supply houses and hardware stores near you.

Where to buy ›
Questions

Ask us

Not sure which seal fits your pipe? Our team can help, or a local rep can.

Contact Fernco › Find a rep ›