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![Check Valve With Spring (Red) Check Valve With Spring (Red)](https://shop.sourcena.com/lowres/detail/144-183-5.jpg)
Check Valve With Spring (Red)
Item No. 144-183-5
For spill containment and pressure relief of standard Red Jacket 4 inch submersible pumps
![2 Inch Pressure Relief Nipple Check Valve Bronze Viton Seats 2 Inch Pressure Relief Nipple Check Valve Bronze Viton Seats](https://shop.sourcena.com/lowres/detail/212VPR-20-3650.jpg)
2 Inch Pressure Relief Nipple Check Valve Bronze Viton Seats
Item No. 212VPR-20-3650
Mounted in fuel lines at the submersible pump to hold the prime and prevent premature tripping of mechanical leak detectors
![4 Inch Side Seal Cap 4 Inch Side Seal Cap](https://shop.sourcena.com/lowres/detail/405C-0100AC.jpg)
4 Inch Side Seal Cap
Item No. 405C-0100AC
Used for fill ports and access to leak detection on fuel storage tanks
![High Pressure Check Valve Kit For Red Jacket Stp And Variable Speed Stp High Pressure Check Valve Kit For Red Jacket Stp And Variable Speed Stp](https://shop.sourcena.com/lowres/detail/410153-002.jpg)
High Pressure Check Valve Kit For Red Jacket Stp And Variable Speed Stp
Item No. 410153-002
![2 Inch Nipple Check Valve With 25 Psi Expansion Relief 2 Inch Nipple Check Valve With 25 Psi Expansion Relief](https://shop.sourcena.com/lowres/detail/530-0100AV.jpg)
2 Inch Nipple Check Valve With 25 Psi Expansion Relief
Item No. 530-0100AV
One way check valve used to prevent backflow
![4 Inch Tight-Fill Side-Seal Adapter 4 Inch Tight-Fill Side-Seal Adapter](https://shop.sourcena.com/lowres/detail/61AS-2477.jpg)
4 Inch Tight-Fill Side-Seal Adapter
Item No. 61AS-2477
Threads onto the fill pipe of underground storage tanks - designed to mate with side-seal delivery elbows 4 inch threads / 4 inch elbow
![4 Inch Duratuff Toggle-Type Side Seal Cap 4 Inch Duratuff Toggle-Type Side Seal Cap](https://shop.sourcena.com/lowres/detail/62TT-7085.jpg)
4 Inch Duratuff Toggle-Type Side Seal Cap
Item No. 62TT-7085
Designed to mate with 61AS side seal Adapter
![Check Valve With Housing Check Valve With Housing](https://shop.sourcena.com/lowres/detail/410152-001.jpg)
Check Valve With Housing
Item No. 410152-001
4 Inch Red Jacket STP and variable speed replacement part