Water Velocity in PP-R (Polypropylene Random Copolymer)

[EnOm]

Hi,
I was wondering if anyone has experience regarding the maximum allowable velocity in PP-R pipes for domestic water supply.
What I'm currently using is 6 ft/s for cold water supply, and 4 ft/s for hot water supply. I'm especially doubtful about the hot water supply figure because I am actually using a value I got from a presentation done by Grundfos for domestic circulation systems so I'm starting to think that a higher value can be used for non-circulation systems because the flow is not continuous, as opposed to circulation systems where continuous flow might be harsher on the pipes.

Best Regards

 

[PEDARRIN2]

Continuous flow systems would exhibit more probability to erosion and other velocity driven phenomena.

I have not used PP-R piping for domestic water, but I would assume it would have similar recommendations as CPVC and other plastic pipes.

I typically limit velocities to 5 ft/s in plastic pipe, but I have seen other documentation that increases the limit to 8 ft/s.

 

[EnOm]

PEDARRIN2,
Thank you for your response. Understood.