DO NOT leave tubing exposed to direct sunlight for more than 30 days DO NOT forget to insulate exterior rim joists DO NOT take tubing off the end or side of coil ROLL IT OUT DO NOT leave adhesive tapes on tubing DO NOT allow kinks to remain in the tubing see SPLICES DO NOT allow debris to enter tubing, keep ends of tubing taped DO NOT allow tubing to rub on electric wire while pulling tubing DO NOT allow electric wire to rub on tubing while pulling wire DO NOT put heat under food storage areas DO NOT place the tubing close to recessed lights, insulate thetubing DO NOT place tubing within 18 ins. of exterior slab edge DO NOT allow tubing to sag, support every 12 to 16 ins. DO NOT install heat under toilet, it could melt the wax ring DO NOT purchase tubing that has been stored outside. DO NOT use wool carpet DO NOT use cork floor coverings unless they are very thin
Pex-A and Pex-B are both acceptable and will outlast any house you install them in. Pex-C and Pex-Al-Pex is not good and can fail if frozen or subjected to some installation methods. Pex-A is not better tubing than Pex-B, the A-B letters simply indicate that the Pex-A process was invented before the Pex-B process. Pex-A is slightly more flexible than Pex-B, Pex-B is more uniform in wall thickness and will often outperform Pex-A in strength both in freezing and temperature performance.
REMEMBER TO STAPLE UP WARNING SIGNS ONCE YOU START INSTALLING TUBING
EXTRA CARE MUST BE TAKEN IF INSTALLING TUBING IN VERY COLD WEATHER
Avoid putting heat under toilets, refrigerators, freezers and pantries. If tubing goes under these areas, insulate the tubing with foam pipe insulation, or put 2 ins. of high density foam insulation under the appliance or floor.