The Liberty SJ10 SumpJet is a water-powered backup sump pump made by Liberty Pumps in the USA. It runs on water, so it does not require electricity to perform. The ability to power by water allows it to protect a basement even if there is a power outage. This pump is fully automatic with a highly efficient compact design. The liberty pumps SJ10 sump pump water powered accepts inlet water pressure from 20PSI up to 100PSI. Its output flow rate is high enough and uses 1 gallon of sump water to discharge every 2 gallons. The water inlet connection of the pump is 3/4 inch NPT, and the discharge connection is 1-1/2 inch. A durable PVC construction provides high durability to this sump pump. It comes fully assembled and carries a 3-year warranty from the manufacturer. Here we will discuss various aspects of the Liberty sj10 pump.
Key Features of Liberty Pumps SJ10 Sump Pump Water Powered Backup
Diaphragm Switch/Float Assembly
The body of the Liberty sj10 diaphragm switch is constructed of nylon material, while the diaphragm itself is of fiber-reinforced nitrile material. Stainless steel is the construction material for all the metallic elements of the diaphragm switch, including the plunger. The maximum operating pressure of this switch/valve is 100 psi. A neodymium magnet managed by a float executes the opening and closing operations of the valve/switch. The float body is ABS plastic, the float rod guide is ACETAL plastic, and the float rod is stainless steel.
Liberty SJ10 Water Powered backup Sump Pump
Built-in Back Flow Prevention Valve
The Liberty sj10 sump pump features a back water flow prevention valve internally installed at the water supply inlet. The backflow prevention valve prevents reverse flow into the municipal water system. The body of this built-in valve is of NEOPERL/ACETAL material that complies with ASME A112.18.3 and ASME A112.18.1/CSA B125.1 regulations. Also, the prevention device has a foot valve to support it in case of a glitch. It means the foot valve offers enhanced protection to the pump. The foot valve works with a stainless steel spring-loaded poppet, and its body material is PVC. The foot valve is removable.
The maximum discharge rate of the sj10 liberty is 1185 GPH at a lift height of 4 feet at an inlet pressure of 60 psi. Also, it can deliver 1020 GPH at 8 feet lift height and 912 GPH at 12 feet height at an inlet pressure of 60 psi. It has the highest lift height of 15 feet and discharges 810 GPH at that height at an inlet pressure of 60 psi. At 20 psi inlet pressure, the pump can discharge 660 GPH at 4 feet lift height and 348 GPH at 8 feet. It can remove more water than the average for each gallon of water it utilizes. With a high discharge rate, it discharges 2 gallons of water at 5 feet lift height for each 1 gallon it uses.
Heavy Duty Construction
The construction materials of different components sj10 liberty sump pump are stainless, brass, and hardy non-corrosive engineered polymers. Using such materials in the construction ensures compliance with IAPMO standard PS 119 for system strength, performance, pressure, and safety. So to ensure robustness, various construction materials are used as appropriate. For example, the pump's body material is durable PVC, the nozzle/venturi is PVC plastic, the fasteners stainless steel, the adjustable hose clamps stainless, and so on.
The liberty pumps sj10 Sumpjet water powered backup sump pump is delivered fully assembled. Before shipment, the pump is air tested to ensure that the diaphragm switch/valve assembly properly works, the foot valve is up and running, and the nozzle/venturi mechanism is functioning as required.
Inlet, Outlet Fittings
The inlet connection of the liberty pumps sj10 1-1/2-inch discharge Sumpjet water powered back-up pump is SHARKBITE inlet fittings with 3/4 inch NPT. It accepts PEX, copper, or CTS CPVC 3/4 inch lines. The exit line is 1-1/2 inches. Also, the sj10 pump comes with an ABS plastic cover and UPC SCHEDULE 40 PVC pipes.
Liberty sj10 Warranty & Certification
The manufacturing plant of the pump is ISO 9001-certified. It carries a 3-year standard warranty from the manufacturer.
Installation of the Liberty pumps sj10 Sumpjet can be done by tying it to a board or hooking it up to an existing line. There has to be sufficient space in the pit for the float to move freely. The pit's diameter should have at least 18 inches. The sj10 backup pump operates in combination with the regular sump pump. The sj10 works with a maximum fluid temperature of 54.4°C (130°F). A continuously flowing water source is needed for the sj10 pump to run.
Liberty SJ10 Water Powered backup Sump Pump
VIDEO: Liberty SJ10 Water Backup Pump in Work
FAQs About Liberty Pumps SJ10 Sumpjet Water Powered back-up pump
Q: What does it take to prevent flooding in a basement if the pump encounters failure of a seal or an internal valve?
Implementing several measures will reduce the possibility of flooding in the basement.
- Compared to battery backup pumps SJ10 pump is less prone to fail since it requires no maintenance except testing.
- Increase the frequency of the pump test from yearly to monthly or even weekly.
- For testing, dry out the pit and pour a bucket of clean water, then run the pump for a while.
- Install a failure valve.
- Install a water sensor alarm in the basement and a water level alarm in the sump pit.
Q: What are the procedures for removing the foot valve of an SJ10 pump?
It will need to unscrew the cone-shaped gray, filter-like element beneath the uptake tube. The foot valve is inside the cone. The foot valve can be removed or exchanged as needed. Before repairing, it is better to take the pump out of the pit, which makes the job much easier than doing it inside.
Q: At what height do we set the float of the Liberty sj10 water backup sump pump?
The float of the water backup SJ10 pump will work correctly at any height above the 'ON' level of the main pump's float. If the regular pump fails or a power outage occurs, the water level in the sump rises. The rising water level triggers the float that turns the backup pump ON. If the regular pump turns ON, the water level falls and turns the backup pump OFF. So, there is no need for electric power for the backup pump.
Q: What does it mean to have constantly flowing water for the SJ10 pump to work?
It implies the pump must be permanently connected to a full-charged water line to act as a backup pump. If the water supply stops, the pump will stop discharging and will require a reset to work again.
Q: Is the Liberty sj10 backup pump float adjustable to a high or low position?
No. The float is fixed and not movable. The whole pump has to fit at a higher or lower stage to change the float level.
Q: What do the venturi of Liberty pumps SJ10 sump pump water powered do?
The venturi is the hydraulic-mechanical pump that performs the actual dewatering job.