NP60 Pex

[StupidSheet]

Is this alright to use or do I need NP75? What's the difference?

 

[StupidSheet]

No one knows? I would like to pick it up this weekend when I'm in the States but I want to make sure I get the right one. I did do a search and came up empty handed.

 

[stingry]

Is this alright to use or do I need NP75? What's the difference?

NP75 for radiant heating. It is an oxygen barrier PEX which keeps oxygen out of your radiant fluid. Oxygen will promote rust with any ferrous metals in the system.

NP60 is for potable water.

Cheers
Steve

 

[porschedude996TT]

The NP60 is for potable (drinking) water and NP75 is for radiant heating (barrier).

 

[StupidSheet]

Thanks guys! Glad I asked I would've bought the 60.

 

[StupidSheet]

So I picked up some Pex over the weekend. I wanted to grab a 1200' roll but all they had in stock were 250' rolls. After reading through a lot of posts most guys are running loops of 300'. Should I run 250' loops or should I make a connection and run 300' loops? Does it matter?

 

[Highbeam]

I bought 300 foot rolls and ran 6-300 foot loops. 250 footers will be better so long as they are all within about 10% of each other. Where I discovered that shorter is better is when doing head loss calcs. 300 feet at the recommended flow velocity creates a lot of head loss.

 

[StupidSheet]

I bought 300 foot rolls and ran 6-300 foot loops. 250 footers will be better so long as they are all within about 10% of each other. Where I discovered that shorter is better is when doing head loss calcs. 300 feet at the recommended flow velocity creates a lot of head loss.

Thanks.

 

[Highbeam]

You'll be glad you didn't get a single 1200 foot roll. That would have been a heavy sucker and you would have needed some sort of unroller device like they use for electrical but bigger.

With the 250 size rolls you can anchor one end and then roll out the loop on the floor like walking around with a hula hoop. This makes it easy to lay everything out accurately.

Here is my 1800 SF floor. The mesh works as a giant sized sheet of graphing paper to accurately lay out the pipe. The roll in the picture is a 300 footer. Easy to deal with.

 

[StupidSheet]

Thanks Highbeam! Do you mind if I send you a few PMs when I'm about to get going on this? You have replied on a few of my posts and know what you are talking about.

 

[Highbeam]

You can always PM but I am here to learn too and it is best to post your questions as a thread. That way we all can optimize it for you.