Unlike most portable spas, which typically use a filtration system integrated into the skimmer, filter housings can be removed from the spa. We recommend these systems when you are making a wooden or a concrete spa, for example, or when you want to remove your existing skimmer from your spa.
Top-Load models allow you to remove the filter cartridge from above (hence their name) to change and/or clean it without allowing dirt back into the system.
These filter housings have an integrated bypass valve that opens when the water pressure is high. The system is perfect for spas equipped with a two-speed pump. The water is completely filtered when the pump is running at low speed, but the valve opens to let some of the water pass without filtration when the pump is running at high speed. This reduces the risk of damage to the filter cartridge, and ensures a strong flow and water pressure at the massage jets.