Pumps & Plumbing FAQs

Find answers to common questions related to marine pumps and plumbing products.

How do I choose the right marine pump for my boat?

Start by identifying what the pump is used for, such as:

  • Bilge water
  • Fresh water
  • Waste
  • Shower drainage
  • Deck wash
  • Transfer


Then check the voltage, flow rate, hose connections, mounting style, and whether the pump needs to be automatic or manually switched. If you are replacing an old pump, matching the existing model number or specifications is usually the safest route.

How do I know which marine hose I need?

Marine hoses are designed for different jobs, including:

  • Fresh water
  • Sanitation
  • Bilge
  • Fuel
  • Exhaust
  • General drainage

    The correct hose depends on the application, diameter, pressure rating, temperature resistance, and material. Always avoid using a hose outside its intended purpose, especially for fuel, exhaust, or waste systems.

What are skin fittings and sea cocks used for?

Skin fittings and seacocks are used where water passes through the hull, such as for intakes, outlets, drains, and on-board systems. A skin fitting provides the through-hull connection, while a seacock or valve allows the flow of water to be controlled or shut off. These parts are important for on-board safety and should be chosen carefully.

What should I check when replacing a water tank or waste tank fitting?

Check the tank material, fitting size, thread type, hose diameter, seal type and whether the fitting is for freshwater, waste, venting, filling or drainage. Tanks and fittings can vary between systems, so it is best to confirm the exact purpose and measurements before ordering.

Can TMP Global help identify the correct plumbing or pump replacement?

Yes. If you are not sure which pump, hose, valve, fitting, tank part or plumbing component you need, send TMP Global the old part number, photos, measurements, hose diameter, voltage and details of where the part is fitted. This helps narrow down the correct replacement and avoid ordering the wrong part. Get in touch.