THE "Y" FITTING<a data-hook="product-link-linked" class="a-link-normal" href="/Woodstock-International-G1552-4-Y-Fitting/dp/B0000223YC/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Woodstock International G1552 4" Y-Fitting</a>&nbsp;IS MORE EFFICIENT THAN A 90 DEGREE INTERSECTION (FOR SUCTION IN A DUST-COLLECTION SYSTEM).