Sewer Lair Expansion Conversion Kit (for 2025 Reissue)

The Sewer Lair Reissue is here and it’s totally radical! But… Playmates made a few tweaks that changed the connection points. If you’ve already picked up one of my Sewer Lair Expansions, you might have noticed the wall and stairs don’t line up with the new set.

That’s where this kit comes in. The Conversion Kit swaps out the key pieces so your expansion connects smoothly to the Reissue Sewer Lair.

What’s Included

Reissue-compatible Wall – redesigned to match the lowered tunnel port

Updated Stairs – scaled to fit both OG and Reissue setups

Decorative Ooze Drips (bonus!) – because every lair looks better with some mutagen slime oozing down the walls

Details

Designed to work with the 2025 Playmates Sewer Lair Reissue

Hand-finished and vapor-smoothed for a clean, display-ready finish

Easily swaps with your current wall and stairs (no glue or tools required)

Collector’s display item, made to bring your shelf to life

Notes

This listing is for the Conversion Kit only, not the full expansion.

If you’re rocking the Original 1989 Sewer Lair, no need for this kit — your Expansion already fits!

All Petranek Designs pieces are fan-made, small-batch items created in my garage workshop. Thanks for supporting a one-man operation!

👉 Add this Conversion Kit to your cart and keep your Sewer Lair Expansion fully compatible with the new Reissue.

Cowabunga!