Goldenrod fuel tank filters are ideal for farm and ranch, construction, service stations, light industrial, and recreational uses. Two distinct filtering systems are available- See-Thru bowl models with replaceable elements or Spin-On models with disposable canisters. Both feature heavy duty top caps with 3/4 in. or 1 in. NPT pipe fittings and include a gasket. Fuel flows from the inward port of the filter top cap through the paper element inside, which removes microscopic particles from the fuel. Clean fuel then flows up through the center of the element and out through the outward port. Change filter element or canister when fuel flow is restricted.