Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to install a brita filter on a faucet [title] Check the kit. [step] Check the contents of your brita filtration system kit before proceeding. You'll need to make sure that all necessary pieces have been included.

Ending1: A brita filter kit consists of a 29.5 in (90 cm) stiff copper wire that you attach to the water line and a cap screw. [title] Remove the cap screw from the coffee grinder pipe. Ending2: Normal filter systems usually come with an integrated filtration system. If you don't, however, check the company's website or ask the sales representative at the stock exchange. Ending3: [substeps] The base system is the most crucial element. Your kit should also contain a replaceable filter cartridge and a packet with two sets of faucet adapters and washers. Ending4: Address the status of the brita filter in the system to determine if it is safe to use. [substeps] The system should have a built-in " auto auto quit " switch, one that turns on when you shut off the water supply valve to the faucet.

Answer format: ending1/ending2/ending3/ending4