Brettski,
Sorry for the delayed reply...
It is 1/2" PEX. I used ty-wraps to secure it to the wire mesh. I think everything else has been covered. Try to plan ahead on whether you might want to zone off any areas, and run one of your loops into that area. Say for instance, an office area in your workshop. You may never zone it off, but the option will be there. I wouldn't worry too much about damage to one of the loops. That PEX is really tough.
Also, Google "Grundfos UPS15-58". This is a 3 speed circulator pump that is perfect for this kind of application. I got one for $35 + shipping.
Nick added a very important point. Pressurize the PEX before the pour. I put 40PSI in and watched it hold for 2 weeks before the pour.
Last edited by Jersey; 03/17/09 12:50 PM.
