NHW 70 - Water pump Neptun - Free user manual and instructions
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| Product type | Domestic water pump |
| Model | NHW 70 |
| Brand | Neptun |
| Intended use | Transfer of clean water, irrigation, basement drainage |
| Rated power | 700 W |
| Supply voltage | 230 V ~ 50 Hz |
| Max flow rate | 70 L/min |
| Max discharge head | 30 m |
| Max suction depth | 7 m |
| Connection | 1" (25 mm) inlet and outlet |
| Dimensions (L × W × H) | 250 × 200 × 300 mm |
| Weight | 8.5 kg |
| Housing material | Cast iron |
| Impeller material | Brass or stainless steel |
| Seal type | Carbon/ceramic mechanical seal |
| Liquid temperature | Up to 35 °C |
| Thermal protection | Built-in (auto shutdown in case of overheating) |
| Protection class | IPX4 |
| Main functions | Pumping clean water, self-priming (for models with check valve), automatic switch (depending on version) |
| Maintenance and cleaning | Clean the suction filter regularly; drain and rinse with clean water after use if there is risk of freezing |
| Safety | Do not run dry; follow electrical and grounding instructions |
| Spare parts and repairability | Mechanical seal, impeller, capacitor, switch available from the manufacturer |
| General information | 2-year warranty; read the full instruction manual before installation |
Frequently Asked Questions - NHW 70 Neptun
How to install the NHW 70 pump?
Place the pump on a stable and horizontal surface close to the water source. Connect the suction and discharge pipes using sealing gaskets. Fill the pump body with water before first start-up to avoid dry running.
The pump does not start, what should I do?
Check the electrical supply (cable, plug, fuse). Ensure the residual current circuit breaker has not tripped. If the thermal protection has activated, let the pump cool down for 15 minutes before trying again.
How to prime the pump before use?
Remove the filling cap on top of the pump and pour water until it overflows. Replace the cap. This removes air and allows priming.
What is the maximum suction depth?
The maximum suction depth is 7 meters. For best performance, do not exceed 6 meters and use a rigid suction hose of the same diameter.
The pump makes abnormal noise, what should I check?
Abnormal noise may be due to cavitation (air in the circuit), a blocked pump body, or a damaged impeller. Check connection seals and clean the suction filter.
What type of water can be pumped?
This pump is designed for clean water, free of abrasive particles. Do not use for wastewater, flammable, or corrosive liquids.
How to maintain the NHW 70 pump?
After each use, clean the suction filter. If there is risk of freezing, fully drain the pump. Periodically check the mechanical seal and replace if necessary.
Can I use an extension cord?
Yes, but use an extension cable with sufficient cross-section (at least 1.5 mm²) and suitable for outdoor use. Fully unroll the coil to avoid overheating.
The pump leaks at the body, what should I do?
A leak at the body may be due to a worn mechanical seal or a sealing defect. Contact the after-sales service for seal replacement.
What spare parts are available?
Common spare parts are the mechanical seal, impeller, capacitor, and check valve. Refer to the manual for exact references and replacement procedure.
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USER MANUAL NHW 70 Neptun
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Product information
Brand : Neptun
Model : NHW 70
Category : Water pump