Re: Best pipe for trap primer to floor drain?
Posted by LonnythePlumber on April 26, 2003 at 18:37:05:
In response to Re: Best pipe for trap primer to floor drain?
: Copper.

: What is the best type of pipe to use under slab to connect the trap primer to a flood drain?

: : Bruce

I disagree with hj about the use of copper under slab. Concrete eats on copper and so does some sand and soil conditions. The copper institute gives a useful life of copper that I believe is 35 years or less. I'm starting to replace copper water services about once a year.
Copper is the traditional method and is often specified on commercial prints. You're not putting floor drains in a wood floor are you?
Additionally I don't feel they have the technology good enough on these primers. I favor the lavatory drain water connection over the potable water supply source of water which requires maintenance. I don't reccommend them unless required.

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