"SEND IT!" Your 3/8" threaded pump is connected, but now you must deliver clean fluid to the engine and also watch its output pressure. Do all that with this kit set up for either the usual 1/4" (6.35mm) Nylon hose or -4AN. The package combines a 300psi FAILSAFE Sensor, oversized 40-micron filter, and comes with your choice in fittings.
This is the critical pressurized side. Leaks are avoided via use of quality compression fittings and made impossible with the AN option. With flammable methanol concentrations (e.g. 70/30), you'll need AN. For 50/50 ratio brew or pure water, compression and Nylon hose are perfect. Cost is the same.