Homeowners often assume that only the filter cartridge needs attention, but the plastic housing holding the filter also has a functional lifespan. Over a decade of constant pressure cycles can cause the plastic to become brittle or develop microscopic stress fractures. If your housing is over ten years old or if you notice “crazing”—tiny spiderweb lines in the clear plastic—the unit is at a high risk of bursting and should be replaced entirely to protect your home from a flood.

A new housing ensures a secure seal and protects your flooring or cabinets from sudden water damage. Aqua Science stocks reinforced canisters that are specifically rated for high-pressure environments, providing a much more durable alternative to the lightweight housings found at general retailers. Replacing an aging housing is a small preventative investment that provides long-term security for your filtration system.

The most common struggle when changing filters is a stuck or leaking housing. Because of local mineral buildup, the threads of the housing can seize over time, making them nearly impossible to open by hand. Aqua Science recommends using a designated plastic filter wrench rather than metal pliers, which can crack the plastic. This ensures you can apply even pressure to unscrew the sump without damaging the equipment.

To ensure a watertight seal after a filter change, always wipe the rubber O-ring clean of any grit and apply a thin layer of food-grade silicone grease. This prevents the rubber from flattening or drying out, making the housing much easier to unscrew during your next scheduled maintenance. Proper lubrication is the most effective way to prevent persistent drips and extend the life of your filter system’s seals.