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Old 11-23-2022, 10:34 AM   #1
Funny1
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Floor under shower not insulated.

So I just took the cover off at the bottom of the corner shower to see if there are any leak issues and it all looks nice and dry, BUT I noticed a cutout under the shower drain for whatever reason without any insulation. This normal? Wouldn't you think they throw some batting in there? Anyhow I was also curious what the measurements of the sandwiched floor was like and what I think I see is styrofoam sandwiched between a layer of 1/4' plywood floor and maybe a 1/8" bottom layer. No wonder these floors become soft in high traffic areas by 200lb+ users......
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Old 11-23-2022, 12:39 PM   #2
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Just a WAG, but I bet it was for the P trap to fit, but they used the Hepvo instead.
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Old 11-23-2022, 04:04 PM   #3
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OK, I will admit ignorance. What does Hepvo mean? How does it keep odors from coming up from the gray tank?
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Old 11-23-2022, 04:45 PM   #4
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Quote:
Originally Posted by German Shepherd Guy View Post
OK, I will admit ignorance. What does Hepvo mean? How does it keep odors from coming up from the gray tank?
Google is your friend my friend

Click the link

https://hepvo.com/hepvo-waterless-valve/

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Old 11-23-2022, 04:46 PM   #5
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I'm with Chuck. Looks like a P trap cutout and either the threw in the Hepvo as OE or in the years since it was built someone changed the P trap to the hepvo.

https://hepvo.com/
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Old 11-23-2022, 04:56 PM   #6
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Originally Posted by German Shepherd Guy View Post
OK, I will admit ignorance. What does Hepvo mean? How does it keep odors from coming up from the gray tank?

I know how it works but you sent me down the rabbit hole looking for the meaning of Hepvo.....I give up


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Old 11-23-2022, 05:08 PM   #7
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Quote:
Originally Posted by chuckster57 View Post
Just a WAG, but I bet it was for the P trap to fit, but they used the Hepvo instead.
Quote:
Originally Posted by sourdough View Post
I'm with Chuck. Looks like a P trap cutout and either the threw in the Hepvo as OE or in the years since it was built someone changed the P trap to the hepvo.
Thanks guys I get it now. Never heard of these devices but they have been around for many years it looks like.
A good option for people that don't use their RV showers.
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Old 11-24-2022, 05:07 AM   #8
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Thanks guys. I had never heard of these devices and for all I know I might have one under my shower. One of the reasons I like this site, always learning.
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Old 11-24-2022, 08:39 AM   #9
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Originally Posted by Funny1 View Post
Thanks guys I get it now. Never heard of these devices but they have been around for many years it looks like.
A good option for people that don't use their RV showers.
Your shower should drain just as well with the Hepvo as it would with a P trap.
If you check you may have one at the kitchen sink &/or the bath lavatory. They're used typically in rvs & modular homes where there's no space for a P trap.
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Old 11-24-2022, 09:07 AM   #10
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I have the same floor cutout under my drain (it is a standard p-trap). Typical with RV manufacturers where nothing is precise, all openings tend to be much larger than necessary. At least yours has the Darco covering in place, mine was a big open hole to the underbelly space. I had the Coroplast opened for some other work at one point and screwed a piece of plywood over the hole from underneath. We don’t camp in cold weather so I am not worried about the lack of floor insulation in that area. The floor doesn’t have much R-value in the first place, especially considering all the other holes and openings.
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Old 11-25-2022, 05:34 AM   #11
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Quote:
Originally Posted by foldbak View Post
I know how it works but you sent me down the rabbit hole looking for the meaning of Hepvo.....I give up


Here's 10 minutes I'll never get back....

I think I've got the 'Hep' part...the original patent was applied for in 2005 by 'Hepworth Building Products'. I thought maybe the 'v' was for valve, and the 'o' for one-way, but those letters appear in all the various pieces they make, so perhaps not.
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Old 11-27-2022, 06:39 AM   #12
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Quote:
Originally Posted by travelin texans View Post
Your shower should drain just as well with the Hepvo as it would with a P trap.
If you check you may have one at the kitchen sink &/or the bath lavatory. They're used typically in rvs & modular homes where there's no space for a P trap.
I only have the Hepvo under the shower. The bath sink and kitchen sink both have the P-trap. I see no reason to modify them as it won't give me much more storage space. From what I read it's common for people to switch to the Hepvo is when they don't use the shower in the RV and the P-trap will dry up.



Quote:
Originally Posted by NH_Bulldog View Post
I have the same floor cutout under my drain (it is a standard p-trap). Typical with RV manufacturers where nothing is precise, all openings tend to be much larger than necessary. At least yours has the Darco covering in place, mine was a big open hole to the underbelly space. I had the Coroplast opened for some other work at one point and screwed a piece of plywood over the hole from underneath. We don’t camp in cold weather so I am not worried about the lack of floor insulation in that area. The floor doesn’t have much R-value in the first place, especially considering all the other holes and openings.
We may camp in cold weather otherwise it's stored on my driveway so I will throw some insulation in there and cover it up with a thin sheet of ply I have laying around.
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Old Today, 08:50 AM   #13
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I had the same problem, but I installed a Henway instead...
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Old Today, 09:00 AM   #14
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I'm more concerned with them cutting the floor support framing with no reinforcement. But nothing the manufacturers let slide out the door surprises me anymore.
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Old Today, 10:40 AM   #15
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Originally Posted by Moneyslinger View Post
I had the same problem, but I installed a Henway instead...
I put two of them in myself.
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