The Jack Boss is a 12 volt diaphragm pump with an open flow of 5.5 GPM and a 70 PSI maximum. What sets it apart in this class is the accessory pack: a debris filter, two half-inch barbed hose adaptors, two half-inch male-thread hose adaptors and sealing tape. For a first install, that avoids the trip for fittings that stalls many pump swaps.
A 6.5 foot vertical self-prime is enough for a tank beside or below the pump, though it is shorter than the 10 feet some rivals list. The sealing tape is a small touch that reduces leak risk at the threads. It sits in the middle price tier.
Compared with the Heuyrao, it moves less water but arrives ready to install. Add a regulator downstream, since a 70 PSI cut-off is above the range most RV plumbing prefers. In year three the diaphragm and the switch are the wear items, so keep a spare fuse and a short hose in the drawer. A clean strainer and a regulator are the best prevention. The included sealing tape is a useful hint that the maker expects first-time installers.
What works
- Filter, barbs and threaded adapters included
- Sealing tape supplied
- 5.5 GPM with 6.5 ft self-prime
- Middle price tier
Watch out for
- 70 PSI needs a regulator
- Shorter prime than some rivals
Spec sheet
- Flow
- 5.5 GPM open flow
- Pressure
- 70 PSI
- Self-prime
- 6.5 ft vertical
- Included
- Filter, barbs, threaded adapters, tape
- Power
- 12V DC






