A compact three-way tee carrying AN4 male 37-degree flares on each port. In small-bore plumbing it is the tidy way to split a line: feeding a pressure gauge and a sender from the same source, branching a turbo oil feed, or splitting brake and clutch circuits where AN4 hardline and hose are used. Every port takes a standard AN4 female hose end or adapter, so you are not locked into a particular flow direction. Keep in mind that a tee divides flow rather than boosting it, so size the supply line for the combined demand of both branches, not just one.