Replies

1. 
   plumbbill | Jan 28, 2006 05:36am | #1

   Not sure about a membrane but there is a fluid that lets water pass through it & it stays there.

   they use it for waterless urinals.

2. 
   roger g | Jan 28, 2006 05:46am | #2

   skin

    

    

   roger

3. 
   BillHartmann | Jan 28, 2006 06:38am | #3

   Are you talking about an insert for places like floor drains. It is not a membrane, but more like a funnel that closes up, but opens will when filled with water.

   The function is to trap sewer gass, but not need a water filled trap that can evaporate.

   Is that what you are talking about?

1. 
   PBJ | Jan 30, 2006 10:56pm | #4

   Thanks for the reply on my membrane question!!Do you have the name of this funnel type check valve or where I can purchase one??

    

   Rob

1. 
   constantin | Jan 30, 2006 11:03pm | #5

   Ask, and ye shall receive. You're looking for a TrapGuard. I have three and they're a godsend. Even approved in MA, and if I'd known about them before ISH NA, I would have a basement with floor drains (sigh).

   [Edited to make the HTML work as intended]

   Edited 1/30/2006 3:04 pm ET by Constantin

1. 
   JonE | Jan 31, 2006 12:29am | #6

   Do ya know if a TrapGuard would work as a retrofit in a trap that was already plumbed with trap primers?  The primers aren't hooked up yet, we're still in rough-in stages, but the concrete is poured.  I'd rather have a passive system than actively pouring water in each trap when a faucet is turned on.

     

1. 
   constantin | Jan 31, 2006 02:38am | #7

   No idea, sorry. I guess it would depend on how far the trap primer plumbing reaches into the stack, I suppose. I'd call the manufacturer, I am sure this is not the first time they've heard of a problem like this.