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Question:

Difference between Schedule 40 and Class 200 PVC pipe?

I am doing an estimate for my sprinkler system materials and it calls for Class 200 PVC pipe. I found a great deal on Schedule 40 PVC pipe. Will this work instead of the Class 200? What is Class 200?Thanks very much for your help.

Answer:

PVC glue basically chemically welds the PVC together. It shouldn't ever turn if glued properly.
If you have 80mm of spacers and rim thickness, I would have to say you are probably doing it wrong. You gotta admit that sounds a little rediculous. Have you considered buying rims that fit, even a little bit?
Most PVC pipe is glued together, occasionally there are screw thread fittings such as at sink traps, unions etc. it would help if you gave more info on what you are trying to do. Added: If you are trying to disconnect the place where water enters the float valve. there should be a plastic or metal nut that unscrews off the bottom of the fill valve. Make sure you are trying to turn it in the correct direction to loosen. Because the nut is on the bottom of the tank, if you are above it and reaching underneath to remove, you will need to turn clock wise to remove. If you are on your back looking up at, it turn counter clockwise to loosen.

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