Therm-a-Rest to Stormberg Sleeping Pad Valve Adapter

🔹 Update:

2025-07-30 – Version 2
This version fits the smaller one-way (check valve) port used for inflating the mattress. The previous design was made for the larger deflation port, which doesn’t require an adapter for deflating.
 

The end connecting to the mattress valve is redisigned to fit the smaller 
🔹 Description:
This custom-designed adapter allows you to use a Therm-a-Rest Pump Sack with the Stormberg Inflatable Sleeping Mat LW R6.6. Perfect for campers and hikers who prefer the lightweight and efficient inflation of a pump sack but want compatibility with Stormberg gear.
The adapter fits snugly into the Stormberg valve and provides a secure seal for effortless inflation. Designed to be lightweight (ca 4-5 grams), durable, and easy to print without supports.

Version 2 Adapter
 

Old adapter

🔹 Highlights:

• ✔️ Enables use of Therm-a-Rest pump sacks with Stormberg LW R6.6 sleeping mats
• ✔️ Lightweight and compact — ideal for backpacking
• ✔️ Secure, airtight fit for efficient inflation
• ✔️ Easy to 3D print — no supports needed
• ✔️ Designed with durability and usability in mind