HTH
Howard
The original post was.capewind said:As I wrote, the contractor COULD be correct, but if a contractor is UNWILLING to answer QUESTIONS, that is a red flag. HOW do you know this contractor is trying to be helpful with a LACK of info??? Then again, there's a saying about assumptions.
It is not clear that texmaster asked why.So I have a delimma. I've already purchased 100 feet of black flex pvc 1.5' pipe for my pond but the company I'm having come in to do the final install "highly recommends" hard pvc. Didn't explain why but I thought flex was the way to go.
Texmaster it come down to wanting pipes that flow the most water for a given pump.. It is best to have pipes with a smooth interior and no sharp corners.. Rigid PVC is smooth. From the pictures it looks like some of the flex PVC may be close to or even smooth. Flex PVC has the advantage that you can use wide sweeping bends. If your flex is smooth or close I would say good enough.
If you have enough pipe you could use a Y fitting at the pump and run 2 lengths of pipe. That would help even if you had rigid. You can play with this. Get a Y and connect it up and see how much more water you get with 1 vs 2 pipes. Beats having the extra sit in the garage.