Generally speaking, a sump Plastic Pump(KEXON) will be the less expensive system to purchase. This is because the plastic parts cost less than their cast-iron counterparts, and also because the materials are much lighter during shipping.

However, it's important to remember that, over the lifetime of your home, you will replace and service your sump pump several times. When deciding which system will offer you the best value, it's worth looking at your sump system in terms of value, not cost.

A cast-iron sump pump may outlive several generations of comparable plastic pumps, making them the better long-term investment, as well as the cost of hiring a contractor to replace your failed system.

A cutaway view of a sump pump system, revealing its impeller

Pump Durability & Lifespan

Both plastic and cast-iron sump pumps will show signs of wear and tear over time. Plastic pumps can yellow and crack, while cast-iron systems may corrode.

It's important to remember that plastic sump pumps will also generally have a plastic impeller -- the part of the pump that pulls water into the system and sends it moving through the discharge line.

These plastic impellers are much easier to damage or strip off the motor shaft than their cast-iron counterparts. Plastic impellers are also vulnerable to additional damage or breaking when rocks or similar debris are pulled into the system.

a diagram of a submersible sump pump system

Heat Dispersal Capabilities

A sump pump generates a lot of heat as it operates -- and if that heat builds up enough, it will cause the pumping motor to break down. This is one of the most common causes of sump pump failure.

The systems that are most resistant to overheating will have the best chance of operating without failure.

Factors that maximize the cooling ability of a sump system include motors that have a single housing (instead of two or more), and those that can be submerged in water, which will cool the system as it operates. A sump pump system with a cast-iron housing will best distribute heat from the motor, ensuring the longest operating lifespan.

Protect Your Home From Flooding With A Submersible Sump Pump!

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