Only use I can think of is to stop smells coming up when your grey water tank gets dirty. That is if your motorhome doesn't have water traps on the shower drain line(s).I don’t have one for this MH last one (Hymer) has one but to be honest never used it.
should I have?
Our motorhome does have traps on both the shower drains, but I understand that many others do not.No need for a plug (or plugs). If there is a smell coming from the waste tank, there should be a trap below and it needs re-filling with water after you've stopped travelling. Shower trays don't usually hold much water, you could flood the van if you let the water build up and it could be made of materials that were not expected to get wet.
You've either not taken off the plastic protective cover or you've got a serious limescale problem in your camper!
Yes they are abd then the top clicks on to stop the water had to by a pack of 2 as only one fits bought a second this week as a spareAre they the basket type plugs?
Stops all the crap going down the plug hole when you shower. Collects it all, then easy to empty. Should have been supplied with van.
Any good?That's the size I need.
i will try a caravan shop as Google doesn't seem to come up with the right size.