https://www.roedersplumbing.com/post/what-is-a-riser-in-plumbing 2026-04-28 https://static.wixstatic.com/media/3263a2_29eaffcb30be47a3918c3d5538e2189f~mv2.jpg https://www.roedersplumbing.com/post/what-is-a-main-line-in-plumbing 2026-04-28 https://static.wixstatic.com/media/3263a2_c8c111e90eb7403d8c2127e9bb61255e~mv2.jpg https://www.roedersplumbing.com/post/what-is-dfu-in-plumbing 2026-04-28 https://static.wixstatic.com/media/3263a2_eeb259a2deb348b4abb0ce3974fd848e~mv2.jpg