• Seaflo Brand New 12V DC 35PSI 1.2GPM 4.5LPM 1.7 Amps Electric Self Priming Diaphragm Pump for Boats RVs Campers Vans by Seaflo

Built for high flow demand, low noise and slow cycling, this diaphragm self-priming pump will insure your vehicle for a long life and top performances. It is perfect for boats, RVs, campers, vans and other trailer based plumbing systems. It is also a mini powerhouse, delivering 1.2 gallons of water per minute to onboard sinks, toilets and showers, while only requiring 1.7 Amps from a 12V DC power source.

- Sprayer fixture (vehicle-mounted sprayer, electric sprayer)
- Clean machine, humidifier, water purification, and medical apparatus
- Food beverage filling and liquid transfer
- Any other pressurization system

Voltage: 12V DC
Flow Capacity: 1.2GPM/4.5LPM
Water Pressure: 35 PSI
Current Draw: 1.7 Amps
Max. Current Draw: 2.7 Amps
Hose Outlets: Fixed 3/8" (10mm) diam. hose tails
Dimensions: 6.69"L x 3.94"W x 2.64"H/170mmL x100mmW x 67mmH
Duty Cycle: Intermittent
Twin Core wire

  • Extremely efficient, low electric consumption and high capacity output of 1.2 gallons per minute
  • Built-in 35 PSI pressure switch for automatic stop/start
  • Built-in pressure switch to automatically turn on and off as you turn your tap or nozzle on and off
  • Built-in thermal protector, able to run dry for extended periods without causing any damages
  • Easy installation; Smooth and quiet operation

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Seaflo Brand New 12V DC 35PSI 1.2GPM 4.5LPM 1.7 Amps Electric Self Priming Diaphragm Pump for Boats RVs Campers Vans by Seaflo

  • Brand: Seaflo
  • Product Code: 1
  • Availability: 20
  • $62.67

Dynamic Head

The effect of the Earths gravity on the "lift" or head pressure is fairly simple; for every vertical foot of distance the pump moves the water you are adding one foot of head pressure so the ratio is a 1:1 ratio. The effects of the friction, caused by water as it travels through your hose or pipes, on the total head pressure is a little more difficult to calculate especially as there are slight variations in pipe friction in different hose materials and the smoothness of the inner bore. Basically. for every ten feet of pipe through which the water has to travel travel horizontally will contribute 1 foot of head height; the ratio of the pipe friction loss is a 10:1 ratio.

Plumbing fixtures and bends and corners in your hose also increase the total head you must calculate to ensure the proper final volume from your pump. Every corner with a 90 degree elbow in your plumbing will add 1 foot of head pressure  with a 1:1 ratio. 45 degree elbows, tees and even insert couplers can all have an impact on the final flow.

If you install a pump 40 feet away from the top of your waterfall which is 6 feet above the pump and the tubing is a single run of 40 feet horizontally then you add 4 feet of head for the tubing length (the 10:1 ratio) to the 6 foot differnetial between the pump location and the final height of the waterfall so your final total dynamic head calculation would be 10 feet. This means your final volume of water flow in this water feature or application would be the volume of flow on the performance curve that equaled the gallons per hour at 16 feet. This volume will certainly be much less than the initial volume the pump can move at an open flow or a zero head.

If in the above example your 40 feet of horizontal tubing run also required 3 elbows of 90 degrees then an additional 3 feet of theoretical head would be added and your final flow result would be at 19 feet on the performance curve of the pump. In this example you would want to choose a pump that has the desired GPH rating at 9 feet of head pressure.  Tubing size is also an important factor in accounting for head pressure loss, in general you should never reduce the diameter of the tubing below what the output size of the pump is, this will drastically increase head pressure, and reduce pump performance.  For maximum pump performance, using the largest tubing that is practical is the best choice. A best practice is to use a hose with an inner diameter that is the same as your pumps outlet fitting.