Types of PVC
Schedule 40 PVC
Pool PVC should be marked "Schedule 40". Schedule 40 PVC is made for water under pressure.
Schedule 80 PVC
You may also find Schedule 80 PVC. Schedule 80 PVC is designed for higher pressure applications and can be used in place of Schedule 40 PVC.
DWV PVC
You will find PVC pipe and fittings marked DWV (Drain, Waste, Vent). DWV is for non-pressurized plumbing and should not be used for a pool. DWV PVC has thinner walls then Schedule 40 PVC.
Schedule 40 PVC parts have deeper hubs (ends) then DWV PVC parts. The shallower ends on DWV parts is the way to identify their incorrect use in pool plumbing.
CPVC
CPVC is sometimes used in pump unions. CPVC can withstand heat and can safely carry drinking water.
Cutting PVC
Gluing PVC
Painting PVC
Prolonged exposure to UV rays (the sun) can degrade PVC and make it prone to cracking. In sunny climates PVC is often painted to protect it from UV degradation.
PVC Parts Sources
Schedule 40 parts are hard to find in the home improvement stores. Below are sources members have found useful.
PVC Fittings Online
PVC Fittings Online has a TON of PVC parts you can't find at HD or Lowes and shipping is affordable. They have a lot of the hard to find stuff like a 2" 90 with a 1" tee.[1]
