The SFS B Side Recirculation Return Assembly (SKU 236615) is a pressure-regulation and controlled air-intake component designed for spray foam and fluid transfer pump systems. This assembly installs directly into a 3/4-inch drum bung hole and ensures that the drum can breathe properly during pumping operations.
The built-in check valve allows clean, one-way airflow into the drum to prevent vacuum lock and pressure buildup. This protects pumps, keeps material flow consistent, and improves overall system efficiency. When paired with the A-side desiccant assembly (236618), the full system provides both moisture control and pressure stabilization.
Related Components & SKUs
Pressure Relief & Airflow Regulation
This B-side assembly provides critical pressure balance within the drum by allowing controlled airflow through a precision brass check valve. This prevents suction against the pump, reduces strain on equipment, and keeps chemical transfer steady.
Key Benefits
- ✔️ Built-in check valve for automatic pressure relief
- ✔️ Allows clean, controlled air intake to prevent vacuum lock
- ✔️ Fits any drum with a 3/4” bung connection
- ✔️ Works with any standard chemical transfer pump
- ✔️ Pairs with A-side assembly for a complete moisture + pressure solution
- ✔️ Durable stainless, brass, PVC, and aluminum components
Technical Components
- 1/2″ Y-strainer for debris protection
- Brass 1/2″ x 1/2″ check valve for pressure-controlled airflow
- Type D and Type F aluminum camlock fittings
- 45° pipe swivel elbow for optimized routing
- 1/4 NPT x #6 JIC connector (6-FTX-S)
- Pipe nipple, adapters & PTFE tape included for leak-proof sealing
Applications
- Spray foam transfer pump systems
- Drum pressure relief and ventilation
- Preventing vacuum lock during pumping
- Balancing airflow when paired with A-side desiccant assembly
FAQs
Does this assembly work with all drums?
Yes. It fits any chemical drum with a 3/4″ bung hole.
Does this include the desiccant cartridge?
No, the desiccant cartridge (SKU 157386) is sold separately.
Do I need the A-side assembly with this?
The B-side manages pressure relief. Pair it with the A-side assembly SKU 236618 for full protection.
