whats the most gPH you can push through a 1.5” drain ? I have a 4300gph pump I was hoping to use to get a better turnover rate without drilling another drain. Any inputs would be appreciated !
Tried pushing 1.5” drain over the max?
- Thread starter yodaLBC
- Start date
Depending on your drain height, 1.5" drain on full siphon should handle that much or more flow.
Theoretical flow can be calculated pretty accurately with Hazen-williams formula. This does not take into account friction loss due to plumbing fittings.
http://www.calctool.org/CALC/eng/civil/hazen-williams_g
http://www.calctool.org/CALC/eng/civil/hazen-williams_g
Yup that chart is a decent ballpark figure. As long as you slap a gate valve on it you should be able to come close. I have my gate barely opened with two 1.5 inch drains tee'd to it. I could lnt get the tip of my pinky finger in the opening
I've been waiting for this to come up again....here's another chart I've been keeping on my desktop for just this occasion.
Your 4300gph pump probably wont give you 4300gph once it is in your system making accurate calculations / predictions difficult. If the flow from the pump is too much for your overflow then just put a restrictor between the pump and the tank to throttle the flow to match your return.
