Things You'll Need
Mobile homes are generally set 2 to 4 feet above a concrete foundation. The metal frame underneath the dwelling is suspended in the air by a set of blocks. The manufactured home is secured to the foundation with "tie-down straps" which are anchored into the ground with 4 to 5-foot augers. The home is then surrounded with decorator blocks or skirting to conceal the gap between the foundation and the home. This makes plumbing lines more easy to access.
Turn off the water supply to the mobile home at the main water valve.
Put on gloves and pull a section of decorator blocks from under the mobile home out to gain access to the underside of the manufactured home. If equipped with skirting, remove the skirting or open the access panel in the skirting by unfastening the screws securing it in place with a screw gun.
Spread out a drop cloth to lie on underneath the mobile home. Crawl to the drain where the shower is located and disconnect the drain line with a pipe wrench.
Hold the drain line away from you and wait for all the water in the line to drain onto the ground.
Follow the drain line to the sewer or septic tank and disconnect it using the pipe wrench. You can now replace the old shower drain line with a new one.