| 1 | Match the machine to pipe diameter and blockage type | Choose between sectional machines, drum machines, high-pressure water jetters, and vacuum units according to pipe size, access, and blockage material. | Drain cables commonly cover approximately 20–150 mm pipes; commercial jetters often cover about 50–600 mm pipes, depending on pressure and flow. | Request a written application chart, demonstration video, load test, and references for similar pipe conditions. | Approx. US$2–10 per operating hour for electricity or fuel, excluding labor and water. | Confirm packed dimensions, lifting points, spare-cable storage, and whether remote troubleshooting is available. |
| 2 | Verify motor, pump, and electrical compatibility | Check rated power, voltage, frequency, phase, motor protection, pump material, and starting current. | Portable electric drain cleaners commonly use 0.75–2.2 kW motors; jetters may use approximately 5.5–30 kW motors or petrol/diesel engines. | Ask for nameplate photos, electrical diagrams, insulation-test records, and confirmation of the required plug and protection device. | Electricity cost depends on local tariffs; a 2.2 kW motor uses about 2.2 kWh per full-load hour. | Confirm conformity documents required in the destination market and whether replacement motors or pumps are stocked. |
| 3 | Evaluate pressure and flow together | Do not compare pressure alone; review working pressure, maximum pressure, water flow, nozzle size, hose length, and duty cycle. | Professional jetters often range from about 100–250 bar and 30–150 L/min; continuous operation may require derating. | Request pump curves, calibrated gauge readings, a continuous-load test, and written limits for pressure and flow. | Water use may range from roughly 30–150 L per minute, creating disposal, supply, and wastewater-handling costs. | Check hose-reel dimensions, frost protection, drain valves, and the availability of compatible nozzles and seals. |
| 4 | Inspect materials and corrosion protection | Review frame steel thickness, weld quality, hose reinforcement, cable material, pump wetted parts, coatings, and fastener grade. | Heavy-duty frames commonly use painted or powder-coated steel; stainless or corrosion-resistant components cost more but suit wet environments. | Request material certificates where relevant, weld photographs, coating specifications, and a corrosion-protection statement. | Poor corrosion control can increase hose, cable, fastener, and pump replacement frequency; inspect and rinse equipment after use. | Use moisture-resistant export packaging, sealed electrical components, and a documented preservation method for sea transport. |
| 5 | Calculate total operating and maintenance cost | Include power or fuel, water, nozzles, cables, hoses, seals, filters, lubricants, labor, and scheduled servicing. | Consumable replacement intervals vary widely; high-use operators should budget regular nozzle, hose, cable, seal, and filter replacement. | Request a parts-price list, service schedule, expected consumable life, and a five-year total-cost estimate. | A realistic comparison should separate energy, consumables, labor, transport, and downtime rather than using purchase price alone. | Ask whether parts are standard sizes, stocked regionally, and shipped under clear harmonized tariff classifications. |
| 6 | Check safety features and operator ergonomics | Look for emergency stop controls, residual-current protection, pressure relief, hose restraints, splash guards, brakes, and stable transport handles. | Commercial units should provide controlled start/stop operation and secure handling of rotating cables or high-pressure hoses. | Request risk assessments, user manuals, safety labels, test records, and an operating demonstration by trained personnel. | Ergonomic controls can reduce setup time, injury risk, and labor cost, even when the purchase price is higher. | Confirm that manuals and warning labels are available in the required language and that replacement safety parts can be ordered. |
| 7 | Confirm portability and vehicle compatibility | Measure machine weight, wheel size, turning radius, handle height, hose reach, cable reach, and vehicle loading requirements. | Compact units may weigh about 25–80 kg; trailer or truck-mounted systems can exceed several hundred kilograms. | Request verified net and gross weights, center-of-gravity information, loading instructions, and a dimensional drawing. | Lower setup time and fewer workers can materially reduce service cost on multi-location jobs. | Compare pallet, crate, and container volume; verify forklift access and whether batteries or fuel components affect transport rules. |
| 8 | Review shipping, customs, and landed cost | Compare EXW, FOB, CIF, and DDP quotations while identifying freight, insurance, duties, taxes, port fees, and inland delivery. | Final landed cost can be substantially higher than the equipment price, especially for bulky frames, tanks, trailers, and vacuum systems. | Require a commercial invoice, packing list, certificate of origin when applicable, HS-code confirmation, and shipment insurance terms. | Include port storage, customs brokerage, local delivery, installation, and possible demurrage in the purchase calculation. | Confirm lead time, production date, inspection point, export packaging, tracking documents, and responsibility for damage claims. |
| 9 | Test the supplier's quality-control process | Check incoming-material inspection, assembly checks, pressure testing, electrical testing, final inspection, and serial-number traceability. | Quality systems should provide repeatable test criteria rather than relying only on visual inspection or a short demonstration. | Request inspection checklists, test certificates, serial-number records, nonconformance procedures, and permission for third-party inspection. | Consistent quality reduces rework, rejected shipments, emergency freight, and downtime after installation. | Agree on acceptance criteria before payment, including performance, appearance, accessories, documentation, and packaging condition. |
| 10 | Secure warranty and after-sales support | Review warranty duration, exclusions, response times, technical support hours, training, spare-parts availability, and repair procedures. | Commercial warranties commonly cover manufacturing defects for about 12 months, subject to documented terms and operating conditions. | Request a sample warranty, service-level commitment, troubleshooting guide, parts lead times, and references from international users. | Calculate downtime exposure and the cost of urgent parts, remote diagnosis, technician travel, and local training. | Clarify who pays return freight, whether replacement parts are sent in advance, and how warranty claims are documented and resolved. |