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Old 09-20-2021, 03:31 PM   #1
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shower drain

2018 Dutch Star, 4018 floor plan. My shower drain seems to be draining slowly. What do you folks use to keep your drains flowing at a steady pace?? Thanks in advance for your comments.
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Old 09-20-2021, 04:02 PM   #2
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Originally Posted by DSRamblers View Post
2018 Dutch Star, 4018 floor plan. My shower drain seems to be draining slowly. What do you folks use to keep your drains flowing at a steady pace?? Thanks in advance for your comments.
I do not have a Newmar but I have a friend who does. There is some kind of a trap in there that he buys the drain cleaner hooks at the big box store. I don't think there are screws to remove the screen over it.

In my Winnebago, I think there is a flap in the pipe that goes to the trap. What I do is let the water run for a minute, while it is still running I take a plunger, hold it over the drain, let about 1 inch of water build and give it a couple couple pumps. The first is always pretty dry but as the 1 inch of water starts to drain I do it several more times. I think it forces water past the little flap and clears it out. I was warned not to do it to hard as not to damage the flap.
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Old 09-20-2021, 05:57 PM   #3
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The drain cover you see in the shower has a screw in the center. Remove that screw/cover and you'll find another screen (crossbars) underneath it. Those will often hold hair and cause slow draining.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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Old 09-20-2021, 06:05 PM   #4
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We bought some of these and they did the trick.
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Old 09-20-2021, 06:09 PM   #5
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Originally Posted by DKRITTER View Post
We bought some of these and they did the trick.
If you have a HEPVO drain valve instead of a P-Trap, DO NOT USE these as it will destroy the rubber duckbill valve. Drano or Liquid Plumbr is recommended for these valves.
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Old 09-20-2021, 11:43 PM   #6
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shower drain

DSÖ.. In a 2018 coach, Iím guessing you have a HEPVO valve, as suggested by LtDan. If your shower floor is less than ~5 inches above the base floor, that would tend to confirm the HEPVO. DO NOT use that barbed clean out tool!
My DS is older (2002) so I donít have to deal with a HEPVO valve, but this same process will be acceptable for you. I buy two bottles of the Mr Plumber brand drain cleaner at Walmart. I use the kitchen sink as my indicator. When that gets a little slow, I clean them all. Or, every 6-8 months regardless. At bedtime I pour about 2/3 bottle down each of my three drains,ó kitchen, bath sink, shower. I leave it overnight and flush all three in the morning. This has worked for me for almost 10 years.
John, Diane, and Lincoln, the guard cat. RVM103
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