PSI running through return line question

[Mr Hughes]

Does anyone know the general PSI range our return lines handle? We all talk about head pressure but I can’t seem to find anything on the PSI. I know there are a crap-ton of variables, hence the range request, but maybe there’s a max PSI calculation based on max head pressure? Really just trying to find out if my impatient butt needs to wait hours for the pvc cement to cure or if it is only a few minutes based on the Oatey guide. 180 PSI seems high but could be localized pressure close to the return, maybe. Doubting it but maybe someone out there knows more than I. Hoping I can get it all up and running before the bowl games tonight. LoL

 

[PotatoPig]

The PSI from your return pump should be minuscule compared to what these connection systems are designed for.

10psi is, for example, is equivalent to about a 23 foot head of water.

For a quick calculation of maximum pressure at the pump.

Max Head (in feet) x 0.43 = psi

 

[The_Paradox]

Depends on diameter and pump size but for most people the number is gonna be well under 20psi.

 

[MrGisonni]

Pvc cement cures in minutes.

 

[Mr Hughes]

Pvc cement cures in minutes.

Good enough for me!

 

[jsker]

Good enough for me!

Ahhh yes, and correct. PVC cement sets in minutes and in most environments, 10 minute set time is all one needs. With a fish tanks, I would suggest to wait 24 hr for the cement to completely set, so that one does not run the risk of any toxicity from the cement not drying hard to bleed in to a closed system.

A work around to be safe would be, one can run a bit of carbon for a day or two to filter out and bad stuff that the cement would leek in to the system if you are in a hurry.