Assertion: hot tub's filter | /r/CapableOf | keep the water
Facets:
Source sentences:
text: A dirty filter reduces the performance of your pump or pumps, makes it more difficult to keep the water clean, and in some cases will not allow the heater to operate.
text: On the flip side, a clean filter allows for great filtration, easier to maintain water, and a hot tub that is ready for you when you're ready for it.
text: The filters keep the water clean as they’re pushed through the jets.