Abstract: A filter apparatus and distributor plate therefor of the quick-change type which are easily fabricated from plastic material by injection molding are disclosed. The distributor plates which are flangeless can accommodate one, two, three or more canisters. The canisters which are neckless have two prong-like arcuate member with flanges. The prong-like members extend through the distributor plate and the canisters are secured to the distributor plate by locking knobs which have mating flanges for engaging the flanges on the prong-like members. Opposing ports in the canisters and distributor plate are seal by O-rings which are housed on the flat top surface of the canisters. For filter apparatuses having more than one canister, the distributor is preferably made in two parts, namely a main body part and an insert part which are bonded into a single unitary part by sonic welding.