Does this part have the flapper valve in it?
Answer Hello! No the inlet sump WD18X10008 does not have the flapper valve included. For the flapper valve order WD01X10175. Thanks!
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Does the inlet sump need to be replaced from bottom, therefore needing to remove dishwasher disconnect and turn over?
Answer Hello Ron,
This depends on you level of patience and manual dexterity. I have changed these with the unit in place but it is easier to change with the unit pulled and laying on its' back. It really depends on how tough the un-install and re-install will be. If there is enough electric line and a flexible water supply line, it would be just as well to pull the unit. If the plumbing is solid and the power cord is short, it may be easier to do it in place, realizing that you will have to work blind and sometimes an inspection mirror is necessary.